GB1505498A - Apparatus for reconstructing body sections - Google Patents
Apparatus for reconstructing body sectionsInfo
- Publication number
- GB1505498A GB1505498A GB2072374A GB2072374A GB1505498A GB 1505498 A GB1505498 A GB 1505498A GB 2072374 A GB2072374 A GB 2072374A GB 2072374 A GB2072374 A GB 2072374A GB 1505498 A GB1505498 A GB 1505498A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ray
- section
- detectors
- source
- rails
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000011159 matrix material Substances 0.000 abstract 3
- 238000010521 absorption reaction Methods 0.000 abstract 2
- 238000005259 measurement Methods 0.000 abstract 1
- 238000002601 radiography Methods 0.000 abstract 1
Classifications
-
- 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]
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Optics & Photonics (AREA)
- Biomedical Technology (AREA)
- Biophysics (AREA)
- High Energy & Nuclear Physics (AREA)
- Theoretical Computer Science (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Pulmonology (AREA)
- Pathology (AREA)
- Radiology & Medical Imaging (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
1505498 Radiography M BARBIERI 12 May 1975 [10 May 1974 8 Nov 1974] 20723/74 and 48378/74 Heading H4F X-ray apparatus for providing an X-ray image of a section of a body of the type described in Specification 1,283,915, wherein the body B is scanned by moving two X-ray sources 28, 29 and two X-ray detectors 30, 31 in the plane of the section, e.g. along parallel rails 33 and 34 which are also rotated with respect to the body, each source being adjacent a detector and opposite the other source, and the resulting X-ray absorption measurement output signal values from the detectors being stored and processed to form display data corresponding to a reconstructed image of the section. An additional pair of X-ray sources, detectors and rails may be provided, these addition rails along which the additional sources and detectors are moved being orthogonal to the first pair of rails (Fig. 4, not shown). Alternatively the two source/detector pairs may be mounted on a circular track and driven at the same speed and in the same direction around the track as shown in Fig. 5, the body B' being scanned being also moveable relative to the track. By scanning the body section with two X-ray source/detector pairs the signal-to-noise ratio of the information used to reconstruct the image of the body section is improved since the two absorption values obtained for each X-ray path through the body but from opposite directions are averaged. The output signals are processed according to a set of iterative reconstruction algorithms including simultaneous equations for forming a first memory matrix whose elements correspond to the densities of the corresponding areas of the reconstructed image, the processing also including the steps of permanently setting to zero all elements having negative values after each iteration and permanently setting all elements having a positive value larger than a predefined value to the predefined value after each iteration. In addition those elements of the first memory matrix whose values remain substantially unchanged for successive iterations are detected and their values permanently set to their value after the previous iteration. Second and third memory matrices may also be formed from the first memory matrix.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2072374A GB1505498A (en) | 1974-05-10 | 1974-05-10 | Apparatus for reconstructing body sections |
| US05/576,109 US4053779A (en) | 1974-05-10 | 1975-05-09 | Method and apparatus for constructing models of body sections |
| IT49525/75A IT1035676B (en) | 1974-05-10 | 1975-05-09 | PROCEDOMENT AND EQUIPMENT FOR REBUILDING STRUCTURES BY MEANS OF X-RAY RADIOGRAPHIES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2072374A GB1505498A (en) | 1974-05-10 | 1974-05-10 | Apparatus for reconstructing body sections |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1505498A true GB1505498A (en) | 1978-03-30 |
Family
ID=10150589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2072374A Expired GB1505498A (en) | 1974-05-10 | 1974-05-10 | Apparatus for reconstructing body sections |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1505498A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009067394A3 (en) * | 2007-11-19 | 2009-12-17 | American Science And Engineering, Inc. | Multiple image collection and synthesis for personnel screening |
| US7796734B2 (en) | 2004-04-09 | 2010-09-14 | American Science And Engineering, Inc. | Multiple image collection and synthesis for personnel screening |
| US10901113B2 (en) | 2015-03-20 | 2021-01-26 | Rapiscan Systems, Inc. | Hand-held portable backscatter inspection system |
| US11143783B2 (en) | 2002-07-23 | 2021-10-12 | Rapiscan Systems, Inc. | Four-sided imaging system and method for detection of contraband |
| US11175245B1 (en) | 2020-06-15 | 2021-11-16 | American Science And Engineering, Inc. | Scatter X-ray imaging with adaptive scanning beam intensity |
| US11340361B1 (en) | 2020-11-23 | 2022-05-24 | American Science And Engineering, Inc. | Wireless transmission detector panel for an X-ray scanner |
| US11525930B2 (en) | 2018-06-20 | 2022-12-13 | American Science And Engineering, Inc. | Wavelength-shifting sheet-coupled scintillation detectors |
| US11579327B2 (en) | 2012-02-14 | 2023-02-14 | American Science And Engineering, Inc. | Handheld backscatter imaging systems with primary and secondary detector arrays |
-
1974
- 1974-05-10 GB GB2072374A patent/GB1505498A/en not_active Expired
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11143783B2 (en) | 2002-07-23 | 2021-10-12 | Rapiscan Systems, Inc. | Four-sided imaging system and method for detection of contraband |
| US8605859B2 (en) | 2004-04-09 | 2013-12-10 | American Science And Engineering, Inc. | Multiple image collection and synthesis for personnel screening |
| US9020100B2 (en) | 2004-04-09 | 2015-04-28 | America Science and Engineering, Inc. | Multiple image collection and synthesis for personnel screening |
| US7809109B2 (en) | 2004-04-09 | 2010-10-05 | American Science And Engineering, Inc. | Multiple image collection and synthesis for personnel screening |
| US7796734B2 (en) | 2004-04-09 | 2010-09-14 | American Science And Engineering, Inc. | Multiple image collection and synthesis for personnel screening |
| CN101960333A (en) * | 2007-11-19 | 2011-01-26 | 美国科技工程公司 | Multiple image collection and synthesis for personnel screening |
| WO2009067394A3 (en) * | 2007-11-19 | 2009-12-17 | American Science And Engineering, Inc. | Multiple image collection and synthesis for personnel screening |
| CN101960333B (en) * | 2007-11-19 | 2016-01-20 | 美国科技工程公司 | For collection and the synthesis of the multiple image of people screening |
| US11579327B2 (en) | 2012-02-14 | 2023-02-14 | American Science And Engineering, Inc. | Handheld backscatter imaging systems with primary and secondary detector arrays |
| US11561320B2 (en) | 2015-03-20 | 2023-01-24 | Rapiscan Systems, Inc. | Hand-held portable backscatter inspection system |
| US10901113B2 (en) | 2015-03-20 | 2021-01-26 | Rapiscan Systems, Inc. | Hand-held portable backscatter inspection system |
| US11300703B2 (en) | 2015-03-20 | 2022-04-12 | Rapiscan Systems, Inc. | Hand-held portable backscatter inspection system |
| US11525930B2 (en) | 2018-06-20 | 2022-12-13 | American Science And Engineering, Inc. | Wavelength-shifting sheet-coupled scintillation detectors |
| US11175245B1 (en) | 2020-06-15 | 2021-11-16 | American Science And Engineering, Inc. | Scatter X-ray imaging with adaptive scanning beam intensity |
| US11340361B1 (en) | 2020-11-23 | 2022-05-24 | American Science And Engineering, Inc. | Wireless transmission detector panel for an X-ray scanner |
| US11726218B2 (en) | 2020-11-23 | 2023-08-15 | American Science arid Engineering, Inc. | Methods and systems for synchronizing backscatter signals and wireless transmission signals in x-ray scanning |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |