Non-invasive measurer of dentistry KVp for x-rays

In this paper it is discussed the response of an instrument developed for non invasive measure of the kilovoltage (KVp) applied to the X-ray tube. The operation principle of the instrument is based on the differential attenuation of the X-ray beam that is produced by copper filters of different thickness. The ratio of the signals produced by photodiodes detectors is related with the KVp applied to the X-ray tube. The equipment response was compared with a calibrated digital equipment (RMI), that measures KVp. The results have shown an excellent correlation between the ratio of signs of both sensors and the KVp. The variation in KVp measured with the instrument and the obtained with RMI was less than 2%. (author)