FR2332740A2 - Transverse tomography system having multibeam orbital scanning - with all beams offset from centre of orbit - Google Patents
Transverse tomography system having multibeam orbital scanning - with all beams offset from centre of orbitInfo
- Publication number
- FR2332740A2 FR2332740A2 FR7635649A FR7635649A FR2332740A2 FR 2332740 A2 FR2332740 A2 FR 2332740A2 FR 7635649 A FR7635649 A FR 7635649A FR 7635649 A FR7635649 A FR 7635649A FR 2332740 A2 FR2332740 A2 FR 2332740A2
- Authority
- FR
- France
- Prior art keywords
- orbit
- patient
- centre
- assemblies
- distance
- 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.)
- Pending
Links
- 238000003325 tomography Methods 0.000 title abstract 2
- 230000000712 assembly Effects 0.000 abstract 4
- 238000000429 assembly Methods 0.000 abstract 4
- 230000001133 acceleration Effects 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000009977 dual effect Effects 0.000 abstract 1
- 230000005855 radiation 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
- A61B6/02—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
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/027—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis characterised by the use of a particular data acquisition trajectory, e.g. helical or spiral
-
- 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
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4488—Means for cooling
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Radiology & Medical Imaging (AREA)
- Molecular Biology (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- High Energy & Nuclear Physics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Pulmonology (AREA)
- Theoretical Computer Science (AREA)
- Apparatus For Radiation Diagnosis (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
A dual axial scanner in a transverse tomography system collects nonredundant data throughout one or more substantially 360 deg. orbital scan paths with uniform motion about a patient. A set of N X-ray beams scans the patient so as to allow collection of two sets of non-redundant data corresponding to a pair of 180 deg. scans in each 360 deg. scan. Overall time to conduct the study is decreased, and the number of required accelerations and decelerations of the assemblies is minimized. The source and detector assemblies are positioned prior to the first orbit such that the field centre is offset a distance D from a centre of orbit lying in the orbital plane. While maintaining the offset distance D, the assemblies orbit the patient, and radiation intensity data is collected at predetermined angles of orbit. In one embodiment for doubling the effective field size of the patient scanned, the source and detector assemblies are rotated about the source axis to provide the distance D.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/635,952 US4008400A (en) | 1975-03-18 | 1975-11-28 | Transverse tomography system having multibeam orbital scanning with all beams offset from the center of orbit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2332740A2 true FR2332740A2 (en) | 1977-06-24 |
Family
ID=24549779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7635649A Pending FR2332740A2 (en) | 1975-11-28 | 1976-11-26 | Transverse tomography system having multibeam orbital scanning - with all beams offset from centre of orbit |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE2654110A1 (en) |
| FR (1) | FR2332740A2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1283915A (en) * | 1968-08-23 | 1972-08-02 | Emi Ltd | A method of and apparatus for examination of a body by radiation such as x or gamma radiation |
| FR2232294B1 (en) * | 1973-06-05 | 1978-01-13 | Emi Ltd |
-
1976
- 1976-11-26 FR FR7635649A patent/FR2332740A2/en active Pending
- 1976-11-29 DE DE19762654110 patent/DE2654110A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE2654110A1 (en) | 1977-06-23 |
| DE2654110C2 (en) | 1987-08-20 |
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