Energy response of LiF (TLD-100) and CaSO4:Dy TL dosimeters to different diagnostic spectra.
Energy response of LiF (TLD-100) and CaSO4:Dy TL dosimeters to different diagnostic X-ray spectra has been studied. Through energy response the X-ray spectrum influences the dose to be measured with a thermoluminescence dosimeter. The energy responses of both dosimeters were calculated with typical diagnostic high voltages 60-140 kVp and with 1-50 mmAl total filtrations for 2-pulse and constant potential generators. Theoretical X-ray spectra were used. Pulse form and small differences in high voltage and in total filtration do not cause any significant error in measured dose due to energy response. The ratio of the energy responses of CaSO4: Dy and LiF does not produce a sufficiently strongly sloping curve as a function of high voltage for the determination of the half-value layer with typical diagnostic exposure values.
D002133:Calcium Sulfate; D002138:Calibration; D005459:Fluorides; D006801:Humans; D008094:Lithium; D018020:Lithium Compounds; D011859:Radiography; D013819:Thermoluminescent Dosimetry / Q000295:instrumentation*
D018020:Lithium Compounds; C027651:lithium fluoride; D008094:Lithium; D005459:Fluorides; D002133:Calcium Sulfate