CN1307944C - Digital foreign matter position finder - Google Patents
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- CN1307944C CN1307944C CNB2004100402504A CN200410040250A CN1307944C CN 1307944 C CN1307944 C CN 1307944C CN B2004100402504 A CNB2004100402504 A CN B2004100402504A CN 200410040250 A CN200410040250 A CN 200410040250A CN 1307944 C CN1307944 C CN 1307944C
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Abstract
The present invention relates to a digital foreign matter positioning instrument which can detect and position the foreign matter in the human body tissue. The present invention is mainly composed of a high voltage generator 1, an X-ray tube 2, a collimator 3, an image intensifier 4, a digital CCD 5, a computer digital imaging system 6, an image display device 7 and a mechanical support frame 8, wherein the high voltage generator 1 is connected with the X-ray tube 2 by an electric cable. The collimator 3 is positioned at the rear end of the X-ray tube 2, and simultaneously, the X-ray tube 2 is connected with the image intensifier 4 by the mechanical support frame 8. The digital CCD 5 is installed at the rear end of the image intensifier 4, and a digital imaging module device controls the CCD 5 to collect and input the signals to a digital imaging device for the real-time processing operation. The signals are outputted to the image display device 7 to display after processing. The present invention has the advantages of accurate positioning, small-size whole machine work and simple and convenient operation.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments, especially a kind of to tissue inside foreign body detecting, localized digital foreign body position finder.
Background technology
Both at home and abroad traditional localization method of foreign body was mainly contained: 1, positive side position method: observe metallic foreign body according to normotopia (being anteroposterior position or postero-anterior position) and occupy the inboard or the outside in the past, and lateral view is examined the situation that metal occupy veutro or dorsal part, judge the position and the degree of depth of foreign body, make skin marker simultaneously so that surgical removal, generally need take perspective and take the photograph the sheet way that combines and reach accurate location; 2, contact pin method: be used for cooperating foreign body location and excision in the surgeon extremity soft tissue more, under perspective, rotate the patient earlier, find foreign body apart from body surface nearest a bit, carry out partly sterilised and anesthesia then, again the perspective under name a person for a particular job cushion thus to foreign body, touch foreign body after, inject tracer immediately, along the tracer direction foreign body is extractd then, said method all must directly position foreign body under the perspective by means of the X-ray sheet or at the X line.Its major defect is: 1. mobility is relatively poor, and the X-ray machine volume of each hospital's equipment is bigger at present, and not only mobility is poor, and owing to field power supply both cannot say for sure to demonstrate,prove, also unstable, thereby be difficult to produce the high-quality photo; 2. complicated operation, time and effort consuming: because the foreign body location needs the film operation mostly, so must the outfit darkroom.And the unit of hospital except that radiology department do not have the darkroom more, constitutes for interim even have yet, and both darkening was bad, also time-consuming water wasting.If use xerogram, though can omit the darkroom, exposure voltage must be brought up to 10～15 kilovolts, and machine loss is increased, and operating process is difficult for streamlined, therefore can not replace film fully; 3. intelligent degree is low: because existing foreign body location adopts common X-ray machine to carry out mostly, thereby not only intelligent degree is low, and resolution is also poor, is difficult for finding small fragmentation and causes and fail to pinpoint a disease in diagnosis mistaken diagnosis; 4. can not provide quantitative information: traditional localization method is with perusal, subjective determination to the judgement of foreign body position mostly, can't obtain to quantize accurately digital information.
Summary of the invention
The purpose of this invention is to provide a kind of to biological in-vivo metal or non-metal foreign body carry out fast, accurate location, easy and simple to handle, the digital foreign body position finder of the defective that can overcome that existing localization method mobility is poor, complicated operation, degree of intelligence is low, the foreign body location can't be quantitative.
In order to achieve the above object, the present invention is by high tension generator, X-ray tube, collimator, image amplifier, numeral CCD, the computer digit imaging system, image display, machinery mount is formed, wherein the computer digit imaging system is mainly formed by main frame and based on the digital imaging apparatus and the digital image modular device of main frame, collimator is positioned at the rear end of X-ray tube, X-ray tube links to each other with image amplifier by machinery mount, numeral CCD also is fixed in the rear end of image amplifier by machinery mount, high tension generator links to each other with X-ray tube by cable, numeral CCD links to each other with the computer digit imaging system by cable, the computer digit imaging system links to each other with image display by cable, digital imaging apparatus and digital image modular device all are installed in the main frame, digital image modular device control figure CCD carries out acquired signal and signal is input to digital imaging apparatus handling in real time, and the signal after the processing outputs to image display and shows.
Described digital imaging apparatus comprises:
PCI image transport sector is used to accept and transmit the digital video signal of input;
The luminance signal processing mechanism carries out image index, γ correction to the digital video signal of importing, and output image is to video data bus VBUS;
Recursive filtering mechanism, the X line image that video data bus VBUS is exported carries out being input to recursive video data/address bus RBUS after real-time de-noising is handled;
HPI adopts the isa bus access mode, connects video data bus VBUS, recursive video data/address bus RBUS, host bus ISABUS and transfer bus PBUS;
Digital-to-analogue conversion mechanism accepts the signal that transfer bus PBUS exports;
Described digital image modular device is made of hardware controls mechanism, flow operations mechanism and system software module mechanism, and described system software module comprises:
The funcall imaging task is finished in user interactions control;
Data management, process invocation, data manipulation;
Flow operations, funcall obtains state;
User interactions control directly and flow operations mechanism transmits signal or by data management transmission signal, flow operations mechanism is by hardware controls mechanism controls hardware device;
Flow operations mechanism in the described digital image modular device comprises:
Image acquisition mechanism carries out video acquisition to fluoroscopy images;
The real-time processor structure strengthens in real time with recursive noise reduction the image of gathering and to handle;
The foreign body detent mechanism is that benchmark carries out geometric calibration with the mark, and the measurement foreign body is at three-dimensional coordinate and quantitative information is provided.
Mesohigh generator of the present invention produces tens of kilovoltages and acts on X-ray tube and make it to launch X ray, through the scattering of collimator with the minimizing ray, the ray that passes tested object is changed into visible light and this signal is amplified enhancing by image amplifier, numeral CCD at first changes visible light signal into analog electrical signal, then analog electrical signal is changed into data image signal and import the computer digit imaging system into, digital imaging apparatus is proofreaied and correct in real time with recursive noise reduction the digital picture of being gathered and is handled to reach display effect clearly, the digital image modular device adopts modularized design, mainly comprise hardware controls, flow process control, data management and user interactions control, all hardware relevant of hardware controls module drive with the X line imaging, wherein be divided into the plurality of sub module again, divide basically identical with the function of hardware.Process control module is based upon on the basis of hardware controls module, utilize its basic function that provides to realize flow processs such as image acquisition, storage, analysis to measure and readjustment, the operational objectives of data management module mainly is the patient data, accept the order of user interactive module, and use process control module to transmit data flow.User interactive module is to user report system mode and data message, converts user's requirement to control command simultaneously and sends to data management control module and process control module.
Advantage of the present invention is:
1, compares with the photography of the related traditional X-ray line of existing positioning mode, the digital imaging technology that this machine adopts has following advantage: 1. the traditional X-ray line imaging with film as medium, integrate image acquisition, demonstration, storage and propagation function, therefore limited the wherein improvement of certain simple function.Digital imaging technology then becomes different independent sectors with these Function Decomposition, thereby can optimize separately each function.2. traditional X-ray line imaging mode is not high for the utilization rate of X heat input.Its detective quantum efficiency only is 20～30%, and digital imaging system can reach more than 60%, so the required radiation dose of latter's imaging can reduce significantly.3. the dynamic range of traditional X-ray line imaging is narrow far beyond digitalized image.The former only is linear change at 2 orders of magnitude, and the latter then can keep linear change in 5 orders of magnitude, so digitalized image can obtain higher density resolution and tolerance is penetrated in bigger exposing to the sun.4. the image of traditional X-ray line imaging gained can not carry out the imaging post processing.If picture quality does not reach the diagnosis requirement for various reasons, can only rechecking because of not improving treatment of picture, digitalized image then can carry out a series of post-processing technologies such as window width and window level adjusting, edge enhancing, greyscale transformation, has increased diagnostic message greatly; 5. the characteristics that have realtime imaging, brightroom operation, resolution height, quantitative analysis.
2, adopt digital CCD to carry out the photoelectricity coupling, realize the front end digitized of detection signal, greatly lower loss and noise in the image signal transmission process.
3, recursive filtering mechanism can carry out real-time hardware self-adapting recursive filtering processing to the image of being gathered in real time, reduces the noise that ray system is introduced, and improves imaging efficiency and quality greatly, need not the pictorial display that the software post processing can obtain fine definition.
4, the digital imaging system analysis software adopts modularized design, and Chinese interface is easy and simple to handle.Particularly can provide quantitative description and graphical directly perceived the expression to the three-dimensional space position of foreign body, calculate the physical dimension (straight length, area circumference, region area etc.) of foreign body.Can choose a certain zone according to actual needs and carry out special handling (as linear stretch, segmentation demonstration, painted, the pseudo-coloured silk processing of segmentation etc.).After finishing diagnosis, all diagnostic images are handled in order to post analysis with bmp or the storage of pg form, and picture and text report is provided.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the theory diagram of digital imaging apparatus among the present invention;
Fig. 3 is a flow operations mechanism principle figure in the digital image modular device among the present invention;
Fig. 4 is a system software module schematic diagram in the digital image modular device among the present invention;
Fig. 5 is the schematic diagram of digital CCD5 among the present invention;
Fig. 6 is a flow operations mechanism flow chart in the digital image modular device among the present invention.
The specific embodiment
See that Fig. 1 as can be known: the present invention is mainly by high tension generator 1, X-ray tube 2, collimator 3, image amplifier 4, numeral CCD5, computer digit imaging system 6, image display 7, machinery mount 8 is formed, wherein high tension generator 1 links to each other with X-ray tube 2 by cable, collimator 3 is positioned at the rear end of X-ray tube 2, X-ray tube 2 links to each other with image amplifier 4 by machinery mount 8, the rear end of image amplifier 4 is equipped with digital CCD5, numeral CCD5 links to each other with computer digit imaging system 6 by cable, computer digit imaging system 6 links to each other with image display 7 by cable, computer digit imaging system 6 is formed by main frame and based on the digital imaging apparatus and the digital image modular device of main frame, wherein digital image modular device control figure CCD5 carries out acquired signal and signal is input to digital imaging apparatus handling in real time, and the signal after the processing outputs to image display 7 and shows.Act on X-ray tube 2 in the tens of kilovoltages of this structure mesohigh generator 1 generation and make it to launch X ray, through the scattering of collimator 3 with the minimizing ray, the ray that passes tested object is changed into visible light and this signal is amplified enhancing by image amplifier 4, numeral CCD5 at first changes visible light signal into analog electrical signal, then analog electrical signal is changed into data image signal and import computer digit imaging system 6 into, digital imaging apparatus is proofreaied and correct in real time with recursive noise reduction the digital picture of being gathered and is handled to reach display effect clearly, the digital image modular device adopts modularized design, mainly comprise hardware controls, flow process control, data management and user interactions control, all hardware relevant of hardware controls module drive with the X line imaging, wherein be divided into the plurality of sub module again, divide basically identical with the function of hardware.Process control module is based upon on the basis of hardware controls module, utilize its basic function that provides to realize flow processs such as image acquisition, storage, analysis to measure and readjustment, the operational objectives of data management module mainly is the patient data, accept the order of user interactive module, and use process control module to transmit data flow.User interactive module is to user report system mode and data message, converts user's requirement to control command simultaneously and sends to data management control module and process control module.
See that Fig. 2 is as can be known: described digital imaging apparatus comprises:
PCI image transport sector is used to accept and transmit the digital video signal of input;
The luminance signal processing mechanism carries out image index, γ correction to the digital video signal of importing, and output image is to video data bus VBUS;
Recursive filtering mechanism, the X line image that video data bus VBUS is exported carries out being input to recursive video data/address bus RBUS after real-time de-noising is handled;
HPI adopts the isa bus access mode, connects video data bus VBUS, recursive video data/address bus RBUS, host bus ISABUS and transfer bus PBUS.
Digital-to-analogue conversion mechanism accepts the signal that transfer bus PBUS exports.
Described digital imaging apparatus also comprises:
Picture frame is deposited, and the output image signal that the luminance signal processing mechanism is inputed to video data bus VBUS carries out real-time storage;
The recursive filtering frame is deposited mechanism, and the X line image after real-time de-noising is handled carries out real-time storage;
The HPI frame is deposited mechanism, to the picture signal real-time storage of HPI;
The signal that image storage, logarithmic mode shifter are accepted carries out real-time storage, and and host bus ISABUS between transmit signal.
Wherein between digital-to-analogue conversion mechanism and image storage, be connected with image controller, picture frame deposit and video data bus VBUS between be connected with controller of frame storage.
The continuously real-time X line image digital video signal that digital ccd video camera of the present invention produces reaches the luminance signal processing mechanism by PCI high-speed figure image transmission card, after carrying out the correction of image index, γ correction, output 8bits view data is to video bus VBUS; Recursion filter carries out X line image real-time de-noising to be handled; Picture frame saves as 64Mbytes, supports the real time imaging storage; Image storage is used for superpose literal, symbol note and figure on output image.HPI adopts the isa bus access mode, by connecting video data bus VBUS, recursive video data/address bus RBUS, host bus ISA BUS and transfer bus PBUS storage and readjustment view data.
See Fig. 3, Fig. 6 as can be known: the flow operations mechanism among the present invention in the digital image modular device comprises:
Initialization mechanism carries out initialization; Start software and carry out initialization.
Patient's information browse mechanism to not needing to carry out fluoroscopic examination, directly enters patient's information browse; As not carrying out fluoroscopic examination, directly enter patient's information browse; Carry out fluoroscopic examination as need, then enter next step.
Perspective mechanism begins perspective and makes image acquistion system be in waiting state; Begin perspective, image capturing system is in waiting state; Step on the position finder backpedalling brake, make high tension generator, X-ray tube and image amplifier in running order.
Image acquisition mechanism carries out video acquisition to fluoroscopy images; The light energy of image amplifier rear end is carried out opto-electronic conversion, video acquisition (25 frame/second) and transmission.
The real-time processor structure strengthens in real time with recursive noise reduction the image of gathering and to handle; The image of gathering strengthened in real time with recursive noise reduction handle.
The image storing mechanism is preserved the image after having an X-rayed; Stop perspective, preserve end-frame image.
Check mechanism, the patient's personal information that only needs fluoroscopic observation is preserved; As only carrying out fluoroscopic observation, enter " checking " step, by regulating window width, the outstanding focus details in window position, preserve patient's personal information and fluoroscopy images then; Carry out the foreign body location as need, enter " foreign body location " step.
The foreign body detent mechanism is that benchmark carries out geometric calibration with the mark, and the measurement foreign body is at three dimensional space coordinate and quantitative information is provided; Carrying out the foreign body location, is that benchmark carries out geometric calibration with the metal flag thing promptly, measures the three dimensional space coordinate of foreign body and quantitative information is provided.
Information storage mechanism, the locating information of preserving patient's personal information, fluoroscopy images and foreign body; Preserve the locating information of patient's personal information, fluoroscopy images and foreign body.
Patient's report is printed by figure message printing mechanism; Print patient's report (graph text information).Patient's information browse mechanism to not needing to carry out fluoroscopic examination, directly enters patient's information browse;
Real-time processor structure among the present invention: in X line digital imaging system, inevitably have various noises,, cause the image effect exported not good, influence the identification and the extraction of foreign body as the noise that x-ray system, CCD camera system and A/D conversion are introduced.This foreign body position finder employing figure image intensifying and self adaptation recursive filtering are realized effective elimination of system noise in the real-time digital imaging process, thus the digital picture of the fine definition of obtaining, high s/n ratio.
The enhanced purpose of image is the contrast that increases object of observation performance.Its principle is based on the general line selective filtering, is shown below:
P wherein
iThe sequence of=one n width of cloth image, the collection moment of i=image, W
i=P
iIn the weight coefficient of each pixel, the result images that P=handles obviously reduces through the picture noise of enhancement process.
The principle of recursive filtering algorithm is to utilize the dependency superposed average of adjacent image to remove the Gaussian image noise.Through the image that Filtering Processing generates come down to present image and before image accumulation in time, recursion coefficient is big more, depth of recursion is dark more, noise to remove effect good more, but the sensitivity to image motion also increases thereupon simultaneously, its consequence is to cause the pseudo-shadow of moving target, influences observing effect.This foreign body position finder adopts the method improvement filter effect of variable coefficient recurrence, promptly carries out Region Segmentation earlier, calculates the kinematic coefficient of moving region, different according to the result of calculation practice factor again recursive filterings, and the moving region is high more, and coefficient is more little.The self adaptation recursive filtering algorithm that native system adopts is as follows:
g
n(x，y)＝f
n(x，y)+T(q(M(x，y(g
n-1(x，y)-f
n(x，y))))
G wherein
n(x, y), f
n(x y) is respectively recurrence and handles back image and current input image, and (x y) be the motion detection template to M, and q (r) and T (r) are respectively the mapping function that kinematic coefficient quantization function and motion quantization parameter arrive recursion coefficient.Usually, (x y) is the template of 16 * 16 to 64 * 64 sizes to M, and q (r) produces about 6 grades quantification kinematic coefficient, and T (r) maximum is 0.75, and minima is 0.The setting of recursive filtering mechanism comprises recursion coefficient, recurrence picture size and recurrence picture blanking control, wherein recurrence picture size and recurrence picture blanking are controlled fully by system, and system has enough high-speed memories to realize the recursive filtering of the arbitrary dimension that system can reach, thereby the self adaptation recursive filtering does not need main frame that coefficient is set, independently produce by hardware, its processing capability in real time reaches 50M pixel/second, can finish the real-time synchronous recursive filtering of vertical 1249 row of level 1024 pixels.
Foreign body detent mechanism among the present invention: foreign body three-dimensional fix in vivo need determine that foreign body ties up on the XOY projection plane vertical dimension l apart from reference coordinates axle OX with respect to reference coordinates
x, apart from the air line distance l of reference coordinate system initial point
XyAnd the upright projection on the Z axle is apart from l
ZWith level, vertical-direction length is the crosswise metal flag thing of 10mm as geometric calibration benchmark and reference coordinate system, place near the wound, when detecting sick and wounded's foreign body in vivo, earlier position to be checked is placed between x-ray source and the image amplifier with the position of coronalplane perpendicular to directions of rays, after the start recursive filtering parameter is placed the self adaptation state, adjusting crosswise metal flag thing makes it to be in the same visual field with foreign body, the image that gathered this moment is the projection of foreign body at XOY plane, with x-ray source-image amplifier half-twist, the image of being gathered is that foreign body is in the planar projection of XOZ then.After utilizing the scale of metal flag thing to carry out the geometry calibration, draw two vertical line segment l to X, the Z axle of reference coordinate system respectively from the geometric center of foreign body
x, l
Z, draw straight line l to initial point
Xy, software calculates the length of these three line segments automatically, obtains the quantification three-dimensional localization information of foreign body in reference coordinate system thus.
Image acquisition mechanism is finished by digital CCD assembly among the present invention, the present invention adopts technology and the technologies such as digitized processing of high performance big battle array scientific grade CCD chip and coupling of multizone fibre faceplate and total system 12Bit, makes this assembly have characteristics such as photoelectric transformation efficiency height, energy grade resolution height, signal to noise ratio height, multiple signals high conformity and high-speed real-time.This numeral CCD assembly adopts unique computer power supply design, makes the work of getting final product that links to each other with PCI high-speed figure transmission card of cable of its need, uses flexibly, conveniently.
See that Fig. 4 is as can be known: the digital image modular device is made of hardware controls mechanism, flow operations mechanism and system software module mechanism, and described system software module comprises:
The funcall imaging task is finished in user interactions control;
Data management, process invocation, data manipulation;
Flow operations, funcall obtains state;
User interactions control directly and flow operations mechanism transmits signal or by data management transmission signal, flow operations mechanism is by hardware controls mechanism controls hardware device.
System software module of the present invention is divided into four levels altogether: hardware controls, flow process control, data management and user interactions control.All hardware relevant with the X line imaging of hardware controls module drive wherein are divided into the plurality of sub module again, divide basically identical with the function of hardware.Process control module is based upon on the basis of hardware controls module, utilizes its basic function that provides to realize flow processs such as image acquisition, storage, analysis to measure and readjustment.The operational objectives of data management module mainly is the patient data, accepts the order of user interactive module, and uses process control module to transmit data flow.User interactive module is to user report system mode and data message, converts user's requirement to control command simultaneously and sends to data management control module and process control module.
See that Fig. 5 is as can be known: digital CCD5 comprises:
The CCD chip becomes transform light energy the analog electrical signal be directly proportional with luminous energy;
A/D mechanism converts analog electrical signal to digital signal;
The multi-path digital signal processing mechanism becomes the suitable low level differential digital signal of transmitting with digital signal conversion;
The LVDS interface is connected to the low level differential digital signal on the PCI transmission card through cable;
Sequential control mechanism obtains the control command of PCI transmission card the working status parameter of A/D mechanism is controlled by the LVDS interface;
Logical drive mechanism obtains signal from sequential control mechanism the CCD chip is driven.
Digital CCD5 among the present invention passes to the CCD that is coupled with fibre faceplate with optical fiber with the luminous energy of each luminous point, the analog electrical signal that CCD becomes to be directly proportional with luminous energy with transform light energy, be transformed into digital signal, digital signal conversion become be fit to the low level differential digital signal (LVDS of transmission again through A/D, Low-voltage differential signaling), be connected on the special PCI transmission card through 50 core pattern private cables.By the PCI transmission card, computer system software will obtain digitized light energy signal and carry out corresponding date processing, to restore the intensity of each road light energy signal; Simultaneously, computer system software also can be controlled (as: gain, time of exposure etc.) to the working status parameter of energy collecting system.System works is when the external trigger state, its work schedule is shown in figure four: the trailing edge of external trigger pulse triggers frame CCD exposure signal output, output time=10ms, CCD is in exposure status simultaneously, behind this frame data end of output, CCD is in waiting state, and exposure is proceeded, wait for the arrival of next trigger impulse, to export this exposure signal that obtained.Time of exposure also is subjected to computer control except that being subjected to the external trigger cycle influences, and the checkout time of computer control CCD, checkout time are short more, time of exposure is long more, when checkout time=0 is set, can obtain maximum time of exposure.During practical application, the time of exposure that should preferentially extend, next is only the increasing amplification, to obtain the signal output of maximum signal to noise ratio.
Operation principle of the present invention is: the tens of kilovoltages of high tension generator 1 generation act on X-ray tube 2 makes it to launch X ray, through the scattering of collimator 3 with the minimizing ray, the ray that passes tested object is changed into visible light and this signal is amplified enhancing by image amplifier 4, numeral CCD5 at first changes visible light signal into analog electrical signal, then analog electrical signal is changed into data image signal and import computer digit imaging system 6 into, the operation doctor can carry out pivot operation to the patient according to digital image modular device flow process, digital imaging apparatus is proofreaied and correct in real time with recursive noise reduction the digital picture that digital CCD5 gathered and is handled to reach display effect clearly in operating process, in showing the position fixing process of foreign body, foreign body three-dimensional fix in vivo need determine that foreign body ties up on the XOY projection plane vertical dimension l apart from reference coordinates axle OX with respect to reference coordinates
x, apart from the air line distance l of reference coordinate system initial point
XyAnd the upright projection on the Z axle is apart from l
ZWith level, vertical-direction length is the crosswise metal flag thing of 10mm as geometric calibration benchmark and reference coordinate system, place near the wound, when detecting sick and wounded's foreign body in vivo, earlier position to be checked is placed between x-ray source and the image amplifier with the position of coronalplane perpendicular to directions of rays, after the start recursive filtering parameter is placed the self adaptation state, adjusting crosswise metal flag thing makes it to be in the same visual field with foreign body, the image that gathered this moment is the projection of foreign body at XOY plane, with x-ray source-image amplifier half-twist, the image of being gathered is that foreign body is in the planar projection of XOZ then.After utilizing the scale of metal flag thing to carry out the geometry calibration, draw two vertical line segment l to X, the Z axle of reference coordinate system respectively from the geometric center of foreign body
x, l
Z, draw straight line l to initial point
Xy, software calculates the length of these three line segments automatically, obtains the quantification three-dimensional localization information of foreign body in reference coordinate system thus.
Claims (5)
1, a kind of digital foreign body position finder, comprise high tension generator (1), X-ray tube (2), collimator (3), image amplifier (4), image display (7), machinery mount (8), it is characterized in that: the rear end of image amplifier (4) is equipped with digital CCD (5), numeral CCD (5) links to each other with computer digit imaging system (6) by cable, computer digit imaging system (6) links to each other with image display (7) by cable, computer digit imaging system (6) is formed by main frame and based on the digital imaging apparatus and the digital image modular device of main frame, wherein digital image modular device control figure CCD (5) carries out acquired signal and signal is input to digital imaging apparatus handling in real time, and the signal after the processing outputs to image display (7) and shows;
Described digital imaging apparatus comprises:
PCI image transport sector is used to accept and transmit the digital video signal of input;
The luminance signal processing mechanism carries out image index, γ correction to the digital video signal of importing, and output image is to video data bus VBUS;
Recursive filtering mechanism, the X line image that video data bus VBUS is exported carries out being input to recursive video data/address bus RBUS after real-time de-noising is handled;
HPI adopts the isa bus access mode, connects video data bus VBUS, recursive video data/address bus RBUS, host bus ISABUS and transfer bus PBUS;
Digital-to-analogue conversion mechanism accepts the signal that transfer bus PBUS exports;
Described digital image modular device is made of hardware controls mechanism, flow operations mechanism and system software module mechanism, and described system software module comprises:
The funcall imaging task is finished in user interactions control;
Data management, process invocation, data manipulation;
Flow operations, funcall obtains state;
User interactions control directly and flow operations mechanism transmits signal or by data management transmission signal, flow operations mechanism is by hardware controls mechanism controls hardware device;
Flow operations mechanism in the described digital image modular device comprises:
Image acquisition mechanism carries out video acquisition to fluoroscopy images;
The real-time processor structure strengthens in real time with recursive noise reduction the image of gathering and to handle;
The foreign body detent mechanism is that benchmark carries out geometric calibration with the mark, and the measurement foreign body is at three-dimensional coordinate and quantitative information is provided.
2, digital foreign body position finder according to claim 1, it is characterized in that: described digital imaging apparatus also comprises:
Picture frame is deposited, and the output image signal that the luminance signal processing mechanism is inputed to video data bus VBUS carries out real-time storage;
The recursive filtering frame is deposited mechanism, and the X line image after real-time de-noising is handled carries out real-time storage;
The HPI frame is deposited mechanism, to the picture signal real-time storage of HPI;
The signal that image storage, logarithmic mode shifter are accepted carries out real-time storage, and and host bus ISABUS between transmit signal.
3, digital foreign body position finder according to claim 1 is characterized in that: between digital-to-analogue conversion mechanism and image storage, be connected with image controller, picture frame deposit and video data bus VBUS between be connected with controller of frame storage; Described image storage and picture frame exist in the main frame.
4, digital foreign body position finder according to claim 1, it is characterized in that: the flow operations mechanism in the described digital image modular device also comprises:
Initialization mechanism carries out initialization;
Perspective mechanism begins perspective and makes image capturing system be in waiting state;
The image storing mechanism is preserved the image after having an X-rayed;
Check mechanism, to the patient's that only needs fluoroscopic observation fluoroscopy images by regulate window width, the focus details is checked in the window position, and preserves patient's personal information;
Information storage mechanism, the locating information of preserving patient's personal information, fluoroscopy images and foreign body;
Patient's report is printed by figure message printing mechanism;
Patient's information browse mechanism to not needing to carry out fluoroscopic examination, directly enters patient's information browse.
5, digital foreign body position finder according to claim 1, it is characterized in that: digital CCD (5) comprising:
The CCD chip becomes transform light energy the analog electrical signal be directly proportional with luminous energy;
A/D mechanism converts analog electrical signal to digital signal;
The multi-path digital signal processing mechanism becomes the suitable low level differential digital signal of transmitting with digital signal conversion;
The LVDS interface is connected to the low level differential digital signal on the PCI transmission card through cable;
Sequential control mechanism obtains the control command of PCI transmission card the working status parameter of A/D mechanism is controlled by the LVDS interface;
Logical drive mechanism obtains signal from sequential control mechanism the CCD chip is driven.
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| CNB2004100402504A CN1307944C (en) | 2004-07-16 | 2004-07-16 | Digital foreign matter position finder |
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| CNB2004100402504A CN1307944C (en) | 2004-07-16 | 2004-07-16 | Digital foreign matter position finder |
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| JP5188101B2 (en) * | 2007-06-01 | 2013-04-24 | 株式会社キーエンス | Magnification observation apparatus, magnified image photographing method, magnified image photographing program, and computer-readable recording medium |
| CN101614683B (en) * | 2008-06-27 | 2011-10-05 | 清华大学 | Real-time calibration equipment and method for substance identification system |
| EP2675151A1 (en) * | 2012-06-11 | 2013-12-18 | Agfa Healthcare | A method to evaluate the presence of a source of x-ray beam inhomogeneity during x-ray exposure. |
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