Method and apparatus for producing radiologic three-dimensional

Details Method and apparatus for producing radiologic three-dimensional Method and apparatus for producing radiologic three-dimensional

1994-02-23

1996-06-18

Church, Craig E.

X-ray or gamma ray systems or devices

Electronic circuit

With display or signaling

378 987, H05G 164

Patent

active

055286550

ABSTRACT:
A radiologic three-dimensional imaging apparatus comprises a device for generating an X-ray, a two-dimensional X-ray image detector including an avalanche multiplication image pickup tube for detecting an image of an object with the X-ray transmitted therethrough, a device for producing an average intensity distribution from a plurality of intensity distributions of the X-ray transmitted image, and a device for setting the target voltage applied to the photoconductive layer of the avalanche multiplication image pickup tube for each electron beam scanning position in such a manner the target voltage is high at the central portion of the visual field of the object and low at the peripheral portion thereof.

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"Image Reconstruction from Cone-Beam Projections: Necessary and Sufficient Conditions and Reconstruction Methods", by B. Smith, IEEE Trans. Med. Imaging MI-4, pp. 14-25 (1985).
"A Reconstruction Algorithm from Helical Cone-Beam SPECT" by Y. Weng et al, IEEE Trans. Nucl. Sci. NS-40, pp. 1092-1101 (1993).
"Analytic Reconstruction for Helical-Orbit Cone-Beam SPECT" by C. Wu et al, IEEE Nuclear Science Symposium and Medical Imaging Conference (1993).

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