Microcomputer Controlled Diagnostic X-Ray Exposure Factors: A Pilot Study

A TRS-80 Model 1 with 4 K of memory was programmed according to the XVS system of determining x-ray exposures originally described by Gerhardt Schwartz, M.D. The computer program asks the technician for the parameters of the examination. From these parameters, an XVS number is calculated which yields 3 different kV choices and each of these is associated with 3 different MAS exposures. Since this method of operating provides known exposure factors, it is possible for the technician to make more informed corrections when films are under or over exposed than when phototiming is used. This method is also more satisfying to the technician because he has more control over the radiographic process.