GB1522307A - Radiography - Google Patents

Radiography

Info

Publication number
GB1522307A
GB1522307A GB45548/74A GB4554874A GB1522307A GB 1522307 A GB1522307 A GB 1522307A GB 45548/74 A GB45548/74 A GB 45548/74A GB 4554874 A GB4554874 A GB 4554874A GB 1522307 A GB1522307 A GB 1522307A
Authority
GB
United Kingdom
Prior art keywords
detectors
beams
drum
source
oct
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
Application number
GB45548/74A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EMI Ltd
Original Assignee
EMI Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EMI Ltd filed Critical EMI Ltd
Priority to GB45548/74A priority Critical patent/GB1522307A/en
Publication of GB1522307A publication Critical patent/GB1522307A/en
Expired legal-status Critical Current

Links

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]
    • A61B6/035—Mechanical aspects of 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
    • A61B6/40—Arrangements for generating radiation specially adapted for radiation diagnosis
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
    • G01N23/06—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption
    • G01N23/083—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and measuring the absorption the radiation being X-rays

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Medical Informatics (AREA)
  • Immunology (AREA)
  • General Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Public Health (AREA)
  • Radiology & Medical Imaging (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Optics & Photonics (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Biophysics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Toxicology (AREA)
  • Theoretical Computer Science (AREA)
  • Pulmonology (AREA)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

1522307 Radiography EMI Ltd 22 Oct 1975 [22 Oct 1974] 45548/74 Heading H4F In a radiological examination apparatus of the type wherein a divergent beam of X or gamma radiation passes through a planar slice of a body 2 and the transmitted radiation is collimated at 3 into a number of beams, the transmitted radiation is measured by detectors 5, the number of detectors being greater than the number of collimated beams and the detectors being mounted for movement relative to the source and collimators 3, e.g. on a rotating drum 6 which can also carry photo-diodes if the detectors are scintillators, and also amplifiers and digitisers. At respective positions around the drum there can be a calibration source 23 and a shield 22 to permit the "afterglow" of the detectors to be measured. As usual in such apparatus the source collimators and detectors are orbited about an axis 7 perpendicular to the planar slice and by suitably arranging the overall orbiting and the rotation of drum 6 the effect of using a parallel set of beams can be obtained instead of that of a divergent set.
GB45548/74A 1975-10-22 1975-10-22 Radiography Expired GB1522307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB45548/74A GB1522307A (en) 1975-10-22 1975-10-22 Radiography

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB45548/74A GB1522307A (en) 1975-10-22 1975-10-22 Radiography

Publications (1)

Publication Number Publication Date
GB1522307A true GB1522307A (en) 1978-08-23

Family

ID=10437623

Family Applications (1)

Application Number Title Priority Date Filing Date
GB45548/74A Expired GB1522307A (en) 1975-10-22 1975-10-22 Radiography

Country Status (1)

Country Link
GB (1) GB1522307A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2337884A1 (en) * 1976-01-07 1977-08-05 Philips Nv DEVICE FOR MEASURING DIFFERENCES IN ABSORPTION DEGREE
EP0367856A1 (en) * 1988-11-09 1990-05-16 Siemens Aktiengesellschaft Computerised tomography apparatus
US4969165A (en) * 1987-11-19 1990-11-06 Bio-Imaging Research, Inc. Automatic dynamic focusing for computed tomography

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2337884A1 (en) * 1976-01-07 1977-08-05 Philips Nv DEVICE FOR MEASURING DIFFERENCES IN ABSORPTION DEGREE
US4969165A (en) * 1987-11-19 1990-11-06 Bio-Imaging Research, Inc. Automatic dynamic focusing for computed tomography
EP0367856A1 (en) * 1988-11-09 1990-05-16 Siemens Aktiengesellschaft Computerised tomography apparatus
US5029192A (en) * 1988-11-09 1991-07-02 Siemens Aktiengesellschaft Computer tomography apparatus with detector which is rotatable separately from the x-ray source

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee