FR2391698A1 - DEVICE FOR COMPUTER TOMOGRAPHY - Google Patents
DEVICE FOR COMPUTER TOMOGRAPHYInfo
- Publication number
- FR2391698A1 FR2391698A1 FR7815571A FR7815571A FR2391698A1 FR 2391698 A1 FR2391698 A1 FR 2391698A1 FR 7815571 A FR7815571 A FR 7815571A FR 7815571 A FR7815571 A FR 7815571A FR 2391698 A1 FR2391698 A1 FR 2391698A1
- Authority
- FR
- France
- Prior art keywords
- patient
- source
- examined
- detection elements
- relatively small
- 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.)
- Granted
Links
- 238000002591 computed tomography Methods 0.000 title abstract 2
- 238000001514 detection method Methods 0.000 abstract 2
- 230000005855 radiation Effects 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000003814 drug Substances 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 230000035945 sensitivity Effects 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
- A61B6/42—Arrangements for detecting radiation specially adapted for radiation diagnosis
- A61B6/4275—Arrangements for detecting radiation specially adapted for radiation diagnosis using a detector unit almost surrounding the patient, e.g. more than 180°
-
- 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
- A61B6/06—Diaphragms
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)
- Veterinary Medicine (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Public Health (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)
- Pulmonology (AREA)
- Theoretical Computer Science (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
Dispositif pour la tomographie par voie d'ordinateur dans lequel le patient à examiner est soumis à l'influence, depuis différents points, d'un faisceau de Röntgen divergent à faible dimension transversale, engendré par une source à surface rayonnante relativement petite. Le rayonnement qui localement a pu traverser le patient est mesuré à l'aide d'un détecteur formé par un série d'éléments de détection à surface d'entrée de rayonnement relativement petite, rangés suivant un arc de cercle. Sur la base des résultats de mesure, on calcule par voie d'ordinateur la répartition de densité dans la partie irradiée du patient Au cours de l'examen, la source et le détecteur tournent dans des sens opposés autour d'un axe de rotation commun, transversal au pan du faisceau. Du fait que la source et le détecteur tournent dans des sens opposés, le patient à examiner est << exploré >> par la source et par un élément de détection dans des directions voisines pratiquement parallèles. Les différences éventuelles en sensibilité des éléments de détection ne se manifestent pas par la formation de configurations d'interférence annulaires dans le degré d'absorption calculé Application : appareillage radioscopique utilisé en médecine.A device for computer tomography in which the patient to be examined is subjected to the influence, from different points, of a diverging Röntgen beam of small transverse dimension, generated by a source with a relatively small radiating area. The radiation which may have passed through the patient locally is measured using a detector formed by a series of detection elements with a relatively small radiation entry surface, arranged in an arc of a circle. On the basis of the measurement results, the density distribution in the irradiated part of the patient is calculated by computer.During the examination, the source and the detector rotate in opposite directions around a common axis of rotation , transverse to the side of the beam. Because the source and detector rotate in opposite directions, the patient to be examined is "scanned" by the source and by a sensing element in neighboring substantially parallel directions. Any differences in the sensitivity of the detection elements are not manifested by the formation of annular interference patterns in the calculated absorption degree. Application: fluoroscopic equipment used in medicine.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7705788A NL7705788A (en) | 1977-05-26 | 1977-05-26 | DEVICE FOR COMPUTER TOMOGRAPHY. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2391698A1 true FR2391698A1 (en) | 1978-12-22 |
| FR2391698B1 FR2391698B1 (en) | 1983-07-08 |
Family
ID=19828617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7815571A Granted FR2391698A1 (en) | 1977-05-26 | 1978-05-25 | DEVICE FOR COMPUTER TOMOGRAPHY |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS53147493A (en) |
| BE (1) | BE867413A (en) |
| BR (1) | BR7803296A (en) |
| CA (1) | CA1107407A (en) |
| DE (1) | DE2822089A1 (en) |
| ES (1) | ES470148A1 (en) |
| FR (1) | FR2391698A1 (en) |
| GB (1) | GB1603593A (en) |
| IT (1) | IT1095910B (en) |
| NL (1) | NL7705788A (en) |
| SE (1) | SE7805837L (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0019826A1 (en) * | 1979-05-29 | 1980-12-10 | Siemens Aktiengesellschaft | Tomographic apparatus for transverse section imaging |
| FR2578643A1 (en) * | 1985-03-07 | 1986-09-12 | Siderurgie Fse Inst Rech | Assembly for measuring the transverse thickness profile of a product |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5738023A (en) * | 1980-08-20 | 1982-03-02 | Tokyo Electric Power Co Inc:The | Level detecting method of phase pulse signal |
| CN103860190B (en) * | 2013-04-15 | 2016-08-17 | 上海翰擎高新技术股份有限公司 | A kind of X-ray detection and 3D imaging device |
| CN116919432B (en) * | 2023-09-18 | 2023-12-05 | 四川大学华西第二医院 | Medical imaging equipment based on mobile DR |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5444597B2 (en) * | 1974-03-23 | 1979-12-26 |
-
1977
- 1977-05-26 NL NL7705788A patent/NL7705788A/en not_active Application Discontinuation
-
1978
- 1978-05-18 CA CA303,633A patent/CA1107407A/en not_active Expired
- 1978-05-20 DE DE19782822089 patent/DE2822089A1/en not_active Withdrawn
- 1978-05-23 SE SE7805837A patent/SE7805837L/en unknown
- 1978-05-23 GB GB21386/78A patent/GB1603593A/en not_active Expired
- 1978-05-23 BR BR7803296A patent/BR7803296A/en unknown
- 1978-05-23 JP JP6154578A patent/JPS53147493A/en active Granted
- 1978-05-23 IT IT23714/78A patent/IT1095910B/en active
- 1978-05-24 ES ES470148A patent/ES470148A1/en not_active Expired
- 1978-05-24 BE BE187984A patent/BE867413A/en unknown
- 1978-05-25 FR FR7815571A patent/FR2391698A1/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0019826A1 (en) * | 1979-05-29 | 1980-12-10 | Siemens Aktiengesellschaft | Tomographic apparatus for transverse section imaging |
| FR2578643A1 (en) * | 1985-03-07 | 1986-09-12 | Siderurgie Fse Inst Rech | Assembly for measuring the transverse thickness profile of a product |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2822089A1 (en) | 1978-12-14 |
| IT1095910B (en) | 1985-08-17 |
| CA1107407A (en) | 1981-08-18 |
| BE867413A (en) | 1978-11-24 |
| FR2391698B1 (en) | 1983-07-08 |
| BR7803296A (en) | 1979-01-23 |
| JPS6251622B2 (en) | 1987-10-30 |
| NL7705788A (en) | 1978-11-28 |
| ES470148A1 (en) | 1979-02-01 |
| JPS53147493A (en) | 1978-12-22 |
| SE7805837L (en) | 1978-11-27 |
| GB1603593A (en) | 1981-11-25 |
| IT7823714A0 (en) | 1978-05-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |