X-ray diagnostic apparatus for producing transverse layer images

Details X-ray diagnostic apparatus for producing transverse layer images X-ray diagnostic apparatus for producing transverse layer images

1977-07-20

1980-05-13

Anderson, Bruce C.

Radiant energy

Inspection of solids or liquids by charged particles

Analyte supports

250505, G01N 2300

Patent

active

042030366

ABSTRACT:
In an illustrated embodiment, a ring-shaped X-ray source is operative to supply a fan-shaped X-ray beam from an incremental region thereof, successive incremental regions being sequentially activated to change the angular relationship between the beam and the subject. By way of example, three incremental regions equally spaced about the source ring may be simultaneously activated and then shifted in synchronism with the rotation of a collimator ring such that openings in the collimator ring are continually aligned with the active source regions, and collimator blades are continuously aligned with the active source regions so as to supply transmitted rays from each source region to a series of stationary detector elements. In the illustrated embodiment, the X-ray source regions and a detector ring are laterally offset from each other, and a diaphragm arrangement directs each beam at a slight angle so as to laterally bypass the adjacent portion of the detector ring while impinging on the receiving detectors. Motion of the collimator ring may be utilized to control shifting of the X-ray beams, so that such shifting is precisely synchronized with the movement of the collimator ring.

REFERENCES:
patent: 3250916 (1966-05-01), Rogers
patent: 3778614 (1973-12-01), Hounsfield
patent: 4031395 (1977-06-01), Lemay
patent: 4047041 (1977-09-01), Hounston
patent: 4052618 (1977-10-01), Hounsfield
"Computerized Tomographic Scanner," American Science and Engineering, Inc., Pub. No. ASE-3869, Apr. 1976.

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