Abstract
The resolution available from cooled lithium drift solid state detectors with cooled FET preamplifiers was applied to the problem of accurate and rapid kVp measurement of diagnostic X-ray equipment. The highest energy in the MCA stored spectrum produced by a detector in the primary beam corresponds closely to the kVp at which the machine is operating. In spite of a system resolution of 3 keV FWHM (at 100 keV), computer analysis of the spectrum showed that a direct reading of the analyser memory was in error by only +1 keV. The method was found to be rapid, accurate, eminently feasible and was offered along with mA and beam on-time calibration as a commercial service throughout Southern New England in the summer of 1970.
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