WO2006006966A3 - Drr generation using a non-linear attenuation model - Google Patents

Drr generation using a non-linear attenuation model Download PDF

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Publication number
WO2006006966A3
WO2006006966A3 PCT/US2005/011200 US2005011200W WO2006006966A3 WO 2006006966 A3 WO2006006966 A3 WO 2006006966A3 US 2005011200 W US2005011200 W US 2005011200W WO 2006006966 A3 WO2006006966 A3 WO 2006006966A3
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WO
WIPO (PCT)
Prior art keywords
scan data
scan
drr
modified
bone
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Application number
PCT/US2005/011200
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French (fr)
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WO2006006966A9 (en
WO2006006966A2 (en
Inventor
Dongshan Fu
Gopinath Kuduvalli
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Accuray Inc
Dongshan Fu
Gopinath Kuduvalli
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Publication date
Application filed by Accuray Inc, Dongshan Fu, Gopinath Kuduvalli filed Critical Accuray Inc
Priority to EP05735607A priority Critical patent/EP1773198A4/en
Publication of WO2006006966A2 publication Critical patent/WO2006006966A2/en
Publication of WO2006006966A9 publication Critical patent/WO2006006966A9/en
Publication of WO2006006966A3 publication Critical patent/WO2006006966A3/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T11/00—2D [Two Dimensional] image generation
    • G06T11/003—Reconstruction from projections, e.g. tomography
    • G06T11/008—Specific post-processing after tomographic reconstruction, e.g. voxelisation, metal artifact correction

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Image Processing (AREA)

Abstract

A method and system are presented for generating a DRR of an anatomical region so that the visibility within the DRR of one or more skeletal reference structures is enhanced. 3D scan data, which have been obtained from a 3D scan of the object conducted at a 3D scan energy level, are provided. The 3D scan data are modified to compensated for a difference between the ratio of bone-to-tissue attenuation at the 3D scan energy level, and the ratio of bone-to-tissue attenuation at the intensity of the imaging beam which the DRR emulates. The modified 3D scan data are related to the raw 3D scan data by a non-linear, exponential relationship. A plurality of hypothetical rays are cast through the modified 3D scan data, from the known geometry of the imaging beam. The 3D scan data are integrated along each hypothetical ray, and the integrated values are projected onto an imaging plane.
PCT/US2005/011200 2004-06-30 2005-04-01 Drr generation using a non-linear attenuation model WO2006006966A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05735607A EP1773198A4 (en) 2004-06-30 2005-04-01 Drr generation using a non-linear attenuation model

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/881,206 US7366278B2 (en) 2004-06-30 2004-06-30 DRR generation using a non-linear attenuation model
US10/881,206 2004-06-30

Publications (3)

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WO2006006966A2 WO2006006966A2 (en) 2006-01-19
WO2006006966A9 WO2006006966A9 (en) 2006-03-23
WO2006006966A3 true WO2006006966A3 (en) 2006-12-28

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US (2) US7366278B2 (en)
EP (1) EP1773198A4 (en)
WO (1) WO2006006966A2 (en)

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