专利名称：Method and apparatus for examining a body
by a beam of X-rays or other penetratingradiation
发明人：Leonard G. Rich申请号：US05/601308申请日：19750804公开号：US04032784A公开日：19770628
摘要：A system for examining a body through the use of X-rays or other penetratingradiation includes a means or moving a beam of radiation over a body to be examined anda detector for detecting the intensity of the non-absorbed or body-exiting portion of thebeam. The system is formed into a dynamic closed loop by comparing the detected beamintensity with a given reference signal and utilizing the error signal so obtained todynamically vary the body- incident intensity, or body-incident intensity and wavelength,of the beam in such a manner as to hold the detected intensity at a constant value. Withthe detected intensity held constant, the control signal which dictates the body- incidentintensity, or body- incident intensity and wavelength, of the beam becomes a function ofthe transmissivity of that portion of the body through which the path of the beaminstantaneously passes. As the beam is scanned over the body, the beam control signal issupplied to a computer or other utilization device which extracts transmissivity datatherefrom and processes such data to compose a pictorial or other graphic display.
申请人：THE GERBER SCIENTIFIC INSTRUMENT COMPANY
代理机构：McCormick, Paulding & Huber
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