On the use of a thick carbon target in the 90° Compton spectroscopy for the measurement of diagnostic X-rays

Abstract

In order to perform quality assurance (QA) and quality control (QC) of the X-ray radiographic systems, we studied the Compton spectroscopy using different shape and size of scatterer such as columnar carbon rods of 2 cm diameter, which were cut at different angles of 15°, 30°, 45°, 60° and 75°. The appropriate shape of a carbon scatterer was studied in terms of minimum multiple scattering, the energy broadening and easy practical use. Calculated exposure results from our Compton spectroscopy using two scatteres were confirmed by the results of exposure measurement using a calibrated ionization chamber. The Compton spectroscopy of x-ray radiographic systems with a thick carbon scatterer proved to be a useful method for the evaluation of such system performance.