Title :
Digital X-ray imaging using gas microstrip detectors
Author :
Dixit, M.S. ; Armitage, J.C. ; Bouius, D. ; Diaconescu, L. ; Dubeau, J. ; Grabari, M. ; Johns, P.C. ; Karlen, D. ; Oakham, F.G.
Author_Institution :
Centre for Res. in Particle Phys., Carleton Univ., Ottawa, Ont., Canada
Abstract :
Gas microstrip detectors (GMDs) could be ideal for use in digital X-ray imaging because of their ability to measure accurately, with virtually no noise, the energy and the position of X-ray photons at radiological counting rates. Thus a GMD based imaging system will have high detective quantum efficiency and will also be capable of dual energy radiography using a single X-ray exposure. As proof of principle, a prototype atmospheric pressure GMD imaging system has been built and its performance characterized by imaging standard phantoms and biological specimens. Using 8 keV X-rays from a copper target a line spread function with a FWHM of 230 μm (determined by the photoelectron range of 190 μm) was obtained for a gas mixture of 90% Ar and 10% isobutane
Keywords :
X-ray detection; biomedical equipment; diagnostic radiography; 8 keV; Ar; Cu; X-ray photons; biological specimens; digital X-ray imaging; gas microstrip detectors; gas mixture; high detective quantum efficiency; isobutane; line spread function; medical instrumentation; photoelectron range; prototype atmospheric pressure imaging system; radiological counting rates; standard phantoms; Atmospheric measurements; Energy measurement; Microstrip; Noise measurement; Optical imaging; Position measurement; Radiography; X-ray detection; X-ray detectors; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference Record, 1995., 1995 IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-3180-X
DOI :
10.1109/NSSMIC.1995.500332
