X-ray or gamma ray systems or devices – Beam control – Antiscatter grid
Patent
1988-05-25
1989-06-06
Church, Craig E.
X-ray or gamma ray systems or devices
Beam control
Antiscatter grid
378 17, 378 62, 378 99, 378145, 378155, 378147, 358111, G21K 100
Patent
active
048377961
ABSTRACT:
An X-ray imaging system has an X-ray source, an X-ray image detection section, an X-ray mask member, a drive unit, a memory, a calculating section, and an image output unit. An X-ray image is detected by the X-ray image detection section. The X-ray mask member has X-ray shielding regions, distributed in a predetermined pattern, which locally shield the X-ray. The mask member is driven by the drive unit so that it is inserted in or removed from an X-ray radiation field between the X-ray image detection section and the X-ray source, and is sequentially displaced to predetermined positions in the radiation field. The calculating section calculates scattered X-ray intensity distribution data based on a plurality of transmission X-ray data obtained by irradiating an object with X-rays with the mask member located at different positions in the radiation field, and transmission X-ray data obtained by irradiating the object with X-rays with the mask member located outside this field. The calculating section then calculates X-ray image data from the scattered X-ray intensity distribution data and transmission X-ray data obtained with the mask member located outside the radiation field.
REFERENCES:
patent: 2336026 (1943-12-01), Millenaar
patent: 2679008 (1953-05-01), Hall
patent: 3860821 (1975-01-01), Barrett
patent: 4081681 (1978-03-01), Froggatt
patent: 4087837 (1978-05-01), Geluk
patent: 4114041 (1978-09-01), Oliver
patent: 4286156 (1981-08-01), Wagner
patent: 4380817 (1983-04-01), Harding et al.
patent: 4380818 (1983-04-01), Pfeiler
patent: 4399457 (1983-08-01), Riederer et al.
patent: 4497062 (1985-01-01), Mistretta et al.
patent: 4549307 (1985-10-01), Macovski
patent: 4550419 (1985-10-01), Aichinger et al.
patent: 4571635 (1986-02-01), Mahmoodi et al.
patent: 4599742 (1986-07-01), Kikuchi et al.
patent: 4653080 (1987-03-01), Kikuchi et al.
patent: 4656650 (1987-04-01), Kikuchi et al.
patent: 4677681 (1987-06-01), Klausz
patent: 4688242 (1987-08-01), Ema
Reference Data for Radio Engineers, 4th Ed., International Telephone and Telegraph Co., 1956, pp. 1002-1003.
"Fortschritte auf dem Gebiet der Rontgen-Computer-Tomographie," Von Peter Keil, Erlangen, Phys. Bl. 39 (1983) Nr. 1, pp. 2-8.
Church Craig E.
Freeman John C.
Kabushiki Kaisha Toshiba
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