X-ray or gamma ray systems or devices – Beam control – Scanner
Patent
1990-06-15
1991-09-17
Church, Craig E.
X-ray or gamma ray systems or devices
Beam control
Scanner
378147, G21K 510
Patent
active
050501992
ABSTRACT:
A radiographic apparatus includes an X-ray generator for radiating X-rays, two slit members sequentially arranged to oppose the X-ray generator, a subject being arranged between the slit members, and each of the slit members having at least one linear slit for narrowing down X-rays to obtain a slit-like X-ray beam, a slit member moving unit for moving the slit members in such a manner that an X-ray tube focal point and the slits of the slit members are always aligned with each other, and a cassette film for two-dimensionally recording a slit-like X-ray beam obtained by causing X-rays to pass through the object and the linear slits of the slit members.
REFERENCES:
patent: 4096391 (1978-06-01), Barnes
patent: 4097748 (1978-06-01), Monvoisin
patent: 4355409 (1982-10-01), Amplatz
patent: 4841555 (1989-06-01), Doi et al.
Medical Physics, vol. 6, No. 3, May/Jun. 1979, New York (US); pp. 197-204, Barnes and Brezovich: "The Design and Performance of a Scanning Multiple Slit Assembly,", 1.1.-pp. 200, 1.12.
Church Craig E.
Kabushiki Kaisha Toshiba
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