Abstract
X-ray high-voltage generations have racently been developed. One type incorporating a monitoring unit for X-ray tube voltage and X-ray tube current, has been particularly popular. The output of the monitoring unit is said to be almost proportional to the X-ray tube voltage and current of the X-ray high-voltage generator. The output of the monitoring unit is obtained mainly by a built-in resistance bleeder. We compared the accuracy of the monitoring unit with conventional direct measuring using an invasive tube voltage and current meter(AB-2015D-MII, TOREX). For X-ray tube voltage, almost the same results were obtained with the monitoring unit and the conventional direct measuring method. But the results with inverter-type X-ray generators differed somewhat from those obtained by conventional direct measuring. The X-ray tube current signal measured by the monitoring unit has different overshoot and waveform from that obtained by the conventional direct measuring method. In the steady state, however, the data were almost in agreement. We conclude that the monitoring unit should be applicable to the quality control of X-ray high-voltage generators.
