Title :
Calorimetric Measurement of the Energy Fluence of Diagnostic X-Ray Beams
Author :
Nitzan, Meir ; Mahler, Yona ; Bodenheimer, Joseph S. ; Siew, Fred P.
Author_Institution :
Department of Diagnostic Radiology, Hadassah University Hospital, Jerusalem, Israel, and the Medical Physics Group, Racah Institute of Physics, The Hebrew University
Abstract :
A method for measurement of the energy fluence of diagnostic X-ray beams is described, using total absorption calorimetry. Optimization of the absorbing element is discussed quantitatively, and it is shown that a lead plate of 1 mm is as sensitive as gold or platinum absorbers. Using Styrofoam insulation, semiadiabatic conditions pertain during the measurement time of 2-6 s. Use of the method is illustrated in measurement of energy fluence corresponding to tube voltages of 55-115 kVp. The results are in good agreement with those obtained from X-ray energy spectrum data.
Keywords :
Biomedical measurements; Calorimetry; Density measurement; Electromagnetic wave absorption; Energy measurement; Hospitals; Physics; Radiology; Time measurement; Voltage; Biomedical Engineering; Calorimetry; Mathematics; Radiation, Ionizing; Thermodynamics; X-Rays;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.1983.325188
