Reverse Geometry X-radiography imaging uses a unique configuration of x-ray source, patient, and x-ray detector to produce high resolution images. With the current system, produced by Digiray, one can obtain a resolution of 16 lp/mm and a contrast sensitivity of 0.2%. Using a lead focusing grid with 100 keV x-rays at 1 mA a dose of less than 20 mR/sec was measured. Typical acquisition times are 1/16 sec for 256 line resolution to 8 sec for 2048 line resolution. An optimized multi-detector system under development should reduce the dose rate to far less than 1 mR/sec and allow the possibility for fast volume CT applications providing laminographic view of the patient. Also `mini-probe' detectors have been developed which may be used to produce in-vitro unobstructured views.
Real-time x-ray stereoscopic imaging is obtained with the Reverse Geometry X-rayR (RGXR) system using a large raster scanning x-ray source and two small point detectors. The detectors range in size from 1 inch to 2 millimeters in diameter. The detectors can be mounted on fiber optic cables to increase accessibility. Industrial and medical applications are broad since the small detectors acquire a field of view as large as 10 inches in diameter. Polarized glasses are typically used to separate the fields on a shuttered monitor; the stereoscopic imaging displays can be used as well.
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