Method and apparatus for enhanced sensitivity filmless medical x-ray imaging, including three-dimensional imaging

Title: Method and apparatus for enhanced sensitivity filmless medical x-ray imaging, including three-dimensional imaging

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A filmless X-ray imaging system includes at least one X-ray source, upper and lower collimators, and a solid-state detector array, and can provide three-dimensional imaging capability. The X-ray source plane is distance z{sub 1} above upper collimator plane, distance z{sub 2} above the lower collimator plane, and distance z{sub 3} above the plane of the detector array. The object to be X-rayed is located between the upper and lower collimator planes. The upper and lower collimators and the detector array are moved horizontally with scanning velocities v{sub 1}, v{sub 2}, v{sub 3} proportional to z{sub 1}, z{sub 2} and z{sub 3}, respectively. The pattern and size of openings in the collimators, and between detector positions is proportional such that similar triangles are always defined relative to the location of the X-ray source. X-rays that pass through openings in the upper collimator will always pass through corresponding and similar openings in the lower collimator, and thence to a corresponding detector in the underlying detector array. Substantially 100% of the X-rays irradiating the object (and neither absorbed nor scattered) pass through the lower collimator openings and are detected, which promotes enhanced sensitivity. A computer system coordinates repositioning of the collimators and detectormore »

Inventors:: Parker, S.

Issue Date:: 1995-10-24

OSTI Identifier:: 119050

Assignee:: Univ. of Hawaii, Honolulu, HI (United States) OAK; SCA: 550602; PA: EDB-95:151178; SN: 95001477065

Patent Number(s):: US 5,461,653/A/

Application Number:: PAN: 8-147,401

Contract Number:: AC03-83ER40103

Resource Relation:: Other Information: PBD: 24 Oct 1995

Research Org:: University of Hawaii

Country of Publication:: United States

Language:: English

Subject:: 55 BIOLOGY AND MEDICINE, BASIC STUDIES; BIOMEDICAL RADIOGRAPHY; X-RAY EQUIPMENT; DESIGN; RADIATION DETECTORS; POSITIONING; X-RAY DETECTION; COMPUTERIZED CONTROL SYSTEMS; REAL TIME SYSTEMS

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