Method and apparatus for the measurement of X-ray sources

摘要: An X-ray measurement device (20) is disclosed which utilizes a pair of detector units (29, 30) receive X-rays through filters (40, 41) differing attenuation X-rays. The preferably include two pairs photodiode detectors arranged symmetrically in four quadrants with the diodes each unit diagonally opposite quadrants, thereby minimizing effects changes orientation respect to axis beam. outputs are passed variable gain amplifiers (42, 43) gains automatically adjusted bring output voltages within desired range, and integrated by integrators (49, 50). After selected period time, integration stopped 50) held an analog-to-digital converter (57) determines ratio signals from provides multi-bit signal on bus (58) address lines (59) preprogrammed memory (60). data location addressed conventer may contain corresponds kVp value machine at calculated ratio, provided display (63) provide visual decimal form measured value.