CN100577104C - Heart four-dimensional reestablishment imaging method and system - Google Patents
Heart four-dimensional reestablishment imaging method and system Download PDFInfo
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- CN100577104C CN100577104C CN200710175995A CN200710175995A CN100577104C CN 100577104 C CN100577104 C CN 100577104C CN 200710175995 A CN200710175995 A CN 200710175995A CN 200710175995 A CN200710175995 A CN 200710175995A CN 100577104 C CN100577104 C CN 100577104C
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Abstract
The present invention relates to a heart four-dimensional reconstruction imaging method and a system in the medical detection technology field. The method is to make use of a marked point as a location reference point, which is fixed near a heart and on a relative position with no X rays penetrated. A catheter clings to a certain point of an endocardium. An X ray is projected in different angles on the top end of the catheter and the location reference point. And two planes which contain the projections of the location reference point and the endocardium point are obtained. Perpendiculars are made through the projection points of the endocardium on the planes. The crossing point of the two perpendiculars is the space position point of the endocardium. The system consists of an X-ray machine and a computer which is connected with the X-ray machine and embarks heart four-dimensional reconstruction imaging software. The present invention improves the accuracy and the precision of the heart dynamic image reconstruction, adds a time coordinate, reconstructs the heart tri-dimensional images with different time points of the cardiac cycle and visually reflects heart four-dimensional images for the first time.
Description
Technical field
The present invention relates to technical field of medical detection, particularly a kind of method and system of heart four-dimensional reestablishment imaging.
Background technology
Along with the development that gets involved cardiology apparatus and technology, its status in the cardiovascular disease diagnosis and treatment is more and more noticeable.Simultaneously, get involved the progress of cardiology,, also rebuild and have higher requirement to cardioanatomy for the target spot of mapping treatment more accurately.Classical X line plane imaging system can not fully meet clinical needs.In recent years, electrocardio is dissected mapping system (CARTO, manufacturer are Johnson Co.), contactless electro-anatomical mapping system (Ensite) is the greatness progress of this respect training equipment, makes imaging system develop into three-dimensional from two dimension.
Electrocardio is dissected mapping system (CARTO) and is utilized the principle of GPS navigation system that interested cardiac intima structure is carried out three-dimensional reconstruction.To there be the location-plate of 3 magnetic emission receiving devices to be fixed in the catheter bed below during application, the patient is flat to crouch in the catheter bed top, paste 1 reference electrode (reference point) at the patient back, after conduit sent into the chambers of the heart, place the vertical magnetic field sensor of ablation catheter just can import the variation in amplitude, frequency and the cycle of the field signal that receives into CARTO magnetoelectricity processor, thereby with the three-dimensional position (X of catheter tip in magnetic field, Y, Z) and the anteroposterior diameter of the direction of catheter tip indication, catheter tip bending show after handling by computer workstation.When concrete operations, when conduit contacts with locular wall well, when cardiac cycle is stablized, can automatic or manual be got off by the electromagnetic location of this point and the change records of local electrocardiosignal.The CARTO system has following function: 1. three dimensional display chambers of the heart structure: after with the intact a certain chambers of the heart of CARTO conduit mapping, can reconstruct the three dimensional structure of this chambers of the heart by computer, for the position tool of placing conduit, accurately judging dystopy excitement and conduit is very helpful; 2. location memory: the position of all mapping points is all remembered in computer, the direction of the residing position of ablation catheter, catheter tip curve form and indication when comprising this place of mapping, the time of local electrocardio excitement, wave amplitude and form, with the relation of reference electrode.Like this, whenever ablation catheter can be placed in again a certain ad-hoc location that mapping is once crossed, be specially adapted to the very not frequent ventricular premature contraction of mapping outbreak, artrial premature beat (being called for short the room early), or conduit is shifted when melting, and the more important thing is the light exposure that can significantly reduce the X line.The shortcoming and the limitation of CARTO system are: location-plate places catheter bed below and catheter bed position relative fixed, and after patient moved in bed, then location-plate and patient's relative position changed.Therefore, system requirements pastes a reference electrode at the patient back, and after patient moved, system can report to the police, and there are three problems in this, the first, reference point retract original position but the relative position that can not guarantee heart and location-plate as before; The second, if the relative position of the position of reference point and location-plate does not change, but the relative position of heart and location-plate changes, and system can not report to the police; The 3rd, if the patient shift position is few, system can not report to the police, but repeatedly moves, and takes care of the pence, and can have a strong impact on the accuracy of three-dimensional reconstruction.
Contactless electro-anatomical mapping system (Ensite) is an intracardiac contactless conduit mapping system, it is the technology of new development in recent years, it writes down intracardiac current potential and rebuilds " virtual " three-dimensional intracardiac isoelectric level scaling graph after the machine processing as calculated by contactless sacculus shape electrode catheter in the chambers of the heart, thereby can show ARR originating point and the exciting order of heart in the chambers of the heart intuitively.Intracardiac contactless conduit mapping technology is by 1 64 contactless utmost point sacculus shape electrode being placed in the chambers of the heart and do not contact with endocardium, to survey the intracardiac current potential in far field, rebuild 3360 one pole graph of heart then according to these current potentials, and the generation on virtual three-dimensional endocardium of machine processing back comprises the intracardiac isoelectric level scaling graph of 3360 points as calculated, thereby shows the big originating point often of the interior rhythm of the heart of the chambers of the heart and in proper order exciting intuitively.Because it carries out the structure of chambers of the heart geometry when sinus rhythm, and, after one heir makes up and finishes, can write down the whole depolarization and the process of repolarization of any 1 cardiac cycle, its virtual three-dimensional endocardium equipotential diagram can be observed on computers at any angle, also can select any position and observe its graph of heart waveform.Therefore, be difficult for the case of bringing out or being difficult to continue, have stronger superiority for mapping hemodynamic instability, arrhythmia clinically.Because this mapping system still can show the residing position of ablating electrode, can use to instruct and melt the location of target spot and need not or shorten radiography, therefore, the target spot setting accuracy can be improved, and the time of radiation exposure might be shortened.Its major defect and limitation are that it mainly carries out three-dimensional reconstruction according to the contrary resolution principle of electrocardio, and its accuracy is relatively poor, and is approaching inadequately with true value.
Summary of the invention
The objective of the invention is to propose a kind of method and system of heart four-dimensional reestablishment imaging in order to overcome the weak point of above-mentioned prior art.
The method of a kind of heart four-dimensional reestablishment imaging that the present invention proposes be utilize be positioned near the heart and the fixed radiopaque index point of heart relative position as location reference point, during operation radiopaque electrophysiologicalcatheter catheter sent into the intracardiac endocardium of being close to, catheter tip is as point-of-interest, the top contacts with endocardium point, locus to catheter tip positions, promptly be equivalent to this point of endocardium is positioned, the a certain moment in a complete cardiac cycle, respectively to catheter tip be positioned near the heart and X line that the fixed radiopaque location reference point of heart relative position is carried out different angles is thrown and shone, under electrocardio triggers, obtain two planes that comprise location reference point and this endocardium spot projection respectively, make this planar perpendicular bisector by this intracardiac film spot at these two planar subpoints respectively then, the cross point of two perpendicular bisectors is this intracardiac film spot locus point at a time, by this intracardiac film spot each locus point location constantly in a complete cardiac cycle being come out, form the space-time movement locus of this o'clock a complete cardiac cycle with quadrat method.
Move conduit according to said method and arrive other each point of endocardium, and respectively other each point is positioned as stated above, curved surface is carried out in the position of all points to be connected, because heart moves again and again with respect to each cardiac cycle, trigger with electrocardio, added time coordinate, made the locus of each point of 3-D view of heart corresponding one by one, thereby realized heart four-dimensional reestablishment with each time point of cardiac cycle.
The heart four-dimensional reestablishment imaging system that the present invention proposes is used to realize said method be by can carrying out the X line machine of X line image data acquisition and the computer of the lift-launch one cover heart four-dimensional reestablishment imaging software that is connected with X line machine constitutes to intracardiac film spot, and X line machine is input to the X line image data of gathering in the computer of lift-launch heart four-dimensional reestablishment imaging software and finishes heart four-dimensional reestablishment imaging.
The present invention uses the electrocardio trigger theory and carries out heart four-dimensional reestablishment imaging, added time parameter, embodied the corresponding relation of each point and each time point of cardiac cycle of the 3-D view of heart first intuitively, utilization be positioned near the heart and the fixed radiopaque index point of heart relative position as location reference point, improved accuracy and precision that the heart dynamic image is rebuild greatly.
Description of drawings
Fig. 1 is that the location reference point and the X line of heart of the present invention thrown according to the direction sketch map.
Fig. 2 is the positioning principle sketch map of heart 3-D view of the present invention.
Fig. 3 is the cardiac cycle figure of heart of the present invention.
Fig. 4 is a heart four-dimensional reestablishment imaging of the present invention system.
The specific embodiment
Be described in further detail below in conjunction with the method and system of the drawings and specific embodiments a kind of heart four-dimensional reestablishment imaging of the present invention.As shown in Figure 1, the method of a kind of heart four-dimensional reestablishment imaging that the present invention proposes be utilize be positioned near the heart and the fixed radiopaque index point of heart relative position as location reference point (present embodiment is an example with three location reference point A, B, C point), during operation radiopaque electrophysiologicalcatheter catheter sent into the intracardiac endocardium of being close to, catheter tip G
1Put as point-of-interest top G
1Point contacts with endocardium point, and the locus of catheter tip is positioned, and promptly is equivalent to endocardium G
1Point positions, at a complete cardiac cycle (as shown in Figure 3) T
0-T
nIn T
0Constantly, respectively to catheter tip G
1Near point and be positioned over the heart and X line that the fixed radiopaque location reference point A of heart relative position, B, C point carry out different angles S1 direction and S2 direction is thrown photograph under the electrocardio triggering, obtains T in a cardiac cycle respectively
0Constantly comprise location reference point A, B, C point and this intracardiac film spot G
1The plane 1 of spot projection and plane 2, as shown in Figure 2, then respectively by this intracardiac film spot G
1Point is at these two planar subpoint T1G
1And T2G
1Point is made the perpendicular bisector V1 and the V2 on plane 1 and plane 2, and the cross point of two perpendicular bisectors is this intracardiac film spot G
1Point is at T
0Locus point G constantly
1 0, press with quadrat method this intracardiac film spot G
1O'clock at a complete cardiac cycle (as shown in Figure 3) T
0-T
nIn T
1, T
2, T
3... T
nLocus point G constantly
1 1, G
1 2, G
1 3... G
1 nComing out in the location, forms this o'clock at a complete cardiac cycle T
0-T
nIn the space-time movement locus, that is:
Intracardiac film spot G
1The point:
Mobile conduit arrives other each point of endocardium G
2, G
3... G
mThe point, and respectively endocardial these points are positioned as stated above, curved surface is carried out in the position of all points to be connected, because heart moves again and again with respect to each cardiac cycle, trigger with electrocardio, added time coordinate, make each each locus in its movement locus in the heart 3-D view all corresponding cardiac cycle T
0-T
nIn a time parameter, thereby form heart four-dimensional reestablishment.The principle of above-mentioned four-dimensional reconstruction and method can be summarized as follows:
Intracardiac film spot G
1The point:
Intracardiac film spot G
2The point:
Intracardiac film spot G
3The point:
. . . . . .
. . . . . .
. . . . . .
. . . . . .
. . . . . .
. . . . . .
Intracardiac film spot G
mThe point
Wherein: G
m nRepresent endocardium G
mPoint is at cardiac cycle T
nLocus constantly;
G
m-4D represents endocardium G
mThe four-dimensional movement track of point;
G
n-3D represents T
nMoment heart 3-D view.
As shown in Figure 4, the heart four-dimensional reestablishment imaging system that the present invention is used to realize said method is by carrying out the X line machine (X line machine has X line image data output port) of X line image data acquisition and the computer of the lift-launch one cover heart four-dimensional reestablishment imaging software that is connected with X line machine constitutes to intracardiac film spot, X line machine is input to the X line image data of gathering in the computer that carries heart four-dimensional reestablishment imaging software by the PORT COM (com port) of X line image data output port and computer, by the four-dimensional reconstruction image of output heart after the heart four-dimensional reestablishment imaging software processes of computer.
The invention is not restricted to the foregoing description, to those skilled in the art, any improvement that the above embodiment of the present invention is made or change can not exceed the embodiments of the invention that only illustrate by way of example and the protection domain of claims.
Claims (3)
1. the method for a heart four-dimensional reestablishment imaging is characterized in that, may further comprise the steps:
(1) at a complete cardiac cycle T
0-T
nIn a certain moment, respectively to endocardium G
1Near point and be positioned over the heart and X line that the fixed radiopaque location reference point of heart relative position is carried out different angles S1 direction and S2 direction is thrown and shone, under electrocardio triggered, what obtain in cardiac cycle a certain moment respectively comprised location reference point and this intracardiac film spot G
1The plane 1 of spot projection and plane 2;
(2) then respectively by this intracardiac film spot G
1Point is at these two planar subpoint T1G
1And T2G
1Point is made the perpendicular bisector V1 and the V2 on plane 1 and plane 2, and the cross point of two perpendicular bisectors is this intracardiac film spot G
1Point locus point is at a time pressed with quadrat method this intracardiac film spot G
1O'clock at a complete cardiac cycle T
0-T
nIn each locus point location constantly come out, form the space-time movement locus of this o'clock a complete cardiac cycle;
(3) other each point from the acquired endocardium, and respectively other each point of endocardium is positioned as stated above, curved surface is carried out in the locus of all points connect, then form the heart four-dimensional image reconstruction.
2. according to the method for the described heart four-dimensional reestablishment imaging of claim 1, it is characterized in that: each locus in its movement locus of each on the described endocardium is all corresponding cardiac cycle T
0-T
nIn a time parameter, form heart four-dimensional reestablishment.
3. the system of a heart four-dimensional reestablishment imaging, it is characterized in that, comprise with the lower part: can carry out the computer of the X line machine of X line image data acquisition and the lift-launch that is connected with X line machine one cover heart four-dimensional reestablishment imaging software to intracardiac film spot, the described X line machine that intracardiac film spot is carried out the data acquisition of X line image is provided with near heart and the radiopaque index point that is used for location reference point of heart relative position basic fixed; The described X line machine that intracardiac film spot is carried out the data acquisition of X line image adopts radiopaque electrophysiologicalcatheter catheter to be close to endocardium and makes electrophysiologicalcatheter catheter top G
1Point contacts with endocardium point.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710175995A CN100577104C (en) | 2007-10-17 | 2007-10-17 | Heart four-dimensional reestablishment imaging method and system |
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|---|---|---|---|
| CN200710175995A CN100577104C (en) | 2007-10-17 | 2007-10-17 | Heart four-dimensional reestablishment imaging method and system |
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| CN100577104C true CN100577104C (en) | 2010-01-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8861830B2 (en) | 2011-11-07 | 2014-10-14 | Paieon Inc. | Method and system for detecting and analyzing heart mechanics |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100581453C (en) * | 2008-09-12 | 2010-01-20 | 北京大学 | Determination method of extreme point of magnetocardiogram measurement area |
| CN102722905A (en) * | 2012-05-21 | 2012-10-10 | 上海大学 | Progressive display design for catheter and heart |
| JP6548383B2 (en) * | 2014-11-28 | 2019-07-24 | キヤノンメディカルシステムズ株式会社 | Magnetic resonance imaging system |
| CN109830283A (en) * | 2017-11-23 | 2019-05-31 | 安影科技（北京）有限公司 | A kind of cerebral arteriovenous malformation measurement medical imaging work station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8861830B2 (en) | 2011-11-07 | 2014-10-14 | Paieon Inc. | Method and system for detecting and analyzing heart mechanics |
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