X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1981-11-12
1984-10-16
Church, Craig E.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378 4, G03B 4116
Patent
active
044779224
ABSTRACT:
In an extension of the utility of rotary scan tomographic x-ray apparatus, the apparatus is locked in a fixed angular relationship and the patient support is automatically advanced in small longitudinal increments relative to the angularly fixed scanner, the scanner being pulsed in synchronism with the longitudinal steps to produce successive sets of transmittance readings defining a radiographic shadow image having a substantial longitudinal extent. The stored sets of readings may be reproduced on a conventional television display unit. Advantageously, the scanner may present a fan-type beam which in a fixed angular relationship to the patient still scans a substantial portion of the patient cross section, the x-ray source or sources being pulsed at successive longitudinal positions of the patient relative to the scanning apparatus, and the successive sets of readings being utilized for on line display of a shadow radiograph covering the desired longitudinal extent.
REFERENCES:
patent: 3101407 (1963-08-01), Shipman, Jr.
patent: 3974388 (1976-08-01), Distler et al.
patent: 4047044 (1977-09-01), Weaver
patent: 4051379 (1977-09-01), Zacher
patent: 4174481 (1979-11-01), Liebetruth
Church Craig E.
Siemens Aktiengesellschaft
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