Experimental test of a new method for kVp measurements

We present the results of an experimental test of a new method for measuring the kVp of a diagnostic x‐ray beam. The method involves measuring x‐ray attenuation in copper or tin absorbers and plotting the attenuation curve in a new way. Our measurements were done at 60, 90, 100, and 120 kVp on a 3‐phase, 12‐pulse diagnostic generator. The kVp was measured with a calibrated voltage divider‐oscilloscope system. Except at 90 kVp, excellent agreement was found, with precisions on the order of ±1%. The 90‐kVp point appeared to be somewhat affected by characteristic tungsten radiation and gave agreement with a lower value of precision.