WO2008099314A3 - Apparatus and method for determining high density shadows in projection data - Google Patents
Apparatus and method for determining high density shadows in projection data Download PDFInfo
- Publication number
- WO2008099314A3 WO2008099314A3 PCT/IB2008/050458 IB2008050458W WO2008099314A3 WO 2008099314 A3 WO2008099314 A3 WO 2008099314A3 IB 2008050458 W IB2008050458 W IB 2008050458W WO 2008099314 A3 WO2008099314 A3 WO 2008099314A3
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- projection data
- high density
- determining high
- projection
- shadows
- Prior art date
Links
Classifications
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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
- G06T11/005—Specific pre-processing for tomographic reconstruction, e.g. calibration, source positioning, rebinning, scatter correction, retrospective gating
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/42—Arrangements for detecting radiation specially adapted for radiation diagnosis
- A61B6/4208—Arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector
- A61B6/4233—Arrangements for detecting radiation specially adapted for radiation diagnosis characterised by using a particular type of detector using matrix detectors
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/11—Region-based segmentation
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/174—Segmentation; Edge detection involving the use of two or more images
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10072—Tomographic images
- G06T2207/10081—Computed x-ray tomography [CT]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10116—X-ray image
- G06T2207/10124—Digitally reconstructed radiograph [DRR]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/20—Special algorithmic details
- G06T2207/20212—Image combination
- G06T2207/20224—Image subtraction
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30004—Biomedical image processing
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medical Informatics (AREA)
- Theoretical Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Public Health (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Radiology & Medical Imaging (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- High Energy & Nuclear Physics (AREA)
- Veterinary Medicine (AREA)
- Mathematical Physics (AREA)
- Pulmonology (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
The invention relates to an apparatus for determining high density shadows in projection data, wherein the apparatus comprises a first projection data providing unit (1, 2, 3, 6, 7, 8) for providing first projection data, which correspond to a projection through an object having an amount of high density elements. The apparatus comprises further a second projection data providing unit (12) for providing second projection data, which correspond to a projection through a model of the object, in which the amount of high density elements is reduced. The apparatus further comprises a determination unit (13) for determining high density shadows in the first projection data by comparing the first projection data with the second projection data.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07102266.9 | 2007-02-13 | ||
EP07102266 | 2007-02-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2008099314A2 WO2008099314A2 (en) | 2008-08-21 |
WO2008099314A3 true WO2008099314A3 (en) | 2009-05-14 |
Family
ID=39690595
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2008/050458 WO2008099314A2 (en) | 2007-02-13 | 2008-02-08 | Apparatus and method for determining high density shadows in projection data |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2008099314A2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2922028A1 (en) * | 2014-03-17 | 2015-09-23 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Exploiting residual projection data and reference data for processing data produced by imaging modality |
JP2015228923A (en) * | 2014-06-03 | 2015-12-21 | 株式会社東芝 | X-ray computer tomography apparatus and x-ray diagnostic apparatus |
US10524756B2 (en) * | 2015-08-27 | 2020-01-07 | Varian Medical Systems International | Methods and systems for image artifacts reduction |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005008586A2 (en) * | 2003-07-18 | 2005-01-27 | Koninklijke Philips Electronics N.V. | Metal artifact correction in computed tomography |
US20060020200A1 (en) * | 2004-07-08 | 2006-01-26 | Medow Joshua E | Artifact-free CT angiogram |
-
2008
- 2008-02-08 WO PCT/IB2008/050458 patent/WO2008099314A2/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005008586A2 (en) * | 2003-07-18 | 2005-01-27 | Koninklijke Philips Electronics N.V. | Metal artifact correction in computed tomography |
US20060020200A1 (en) * | 2004-07-08 | 2006-01-26 | Medow Joshua E | Artifact-free CT angiogram |
Non-Patent Citations (2)
Title |
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BAL M ET AL: "Metal artifact reduction in CT using tissue-class modeling and adaptive prefiltering", MEDICAL PHYSICS AIP FOR AMERICAN ASSOC. PHYS. MED USA, vol. 33, no. 8, August 2006 (2006-08-01), pages 2852 - 2859, XP012092215, ISSN: 0094-2405 * |
TOMIZAWA M ET AL: "Improvement of X-ray CT image quality by use of prior information", SYSTEMS AND COMPUTERS IN JAPAN SCRIPTA TECHNICA USA, vol. 30, no. 11, October 1999 (1999-10-01), pages 67 - 76, XP002520421, ISSN: 0882-1666 * |
Also Published As
Publication number | Publication date |
---|---|
WO2008099314A2 (en) | 2008-08-21 |
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