Title :
Development of gas microstrip detectors for digital X-ray imaging and radiation dosimetry
Author :
Dixit, M.S. ; Armitage, J.C. ; Dubeau, Jacques ; Gobbi, D.G. ; Johns, P.C. ; Karlen, D. ; Oakham, F.G. ; Waker, Anthony J.
Author_Institution :
Centre for Res. in Particle Phys., Carleton Univ., Ottawa, Ont., Canada
fDate :
6/1/1998 12:00:00 AM
Abstract :
Our recent work in the application of gas microstrip detector (GMD) technology to the fields of digital X-ray imaging and radiation dosimetry is described. The GMD can measure the position and the energy of individual photons at the high counting rates encountered in X-ray imaging. GMD-based imaging systems have high detective quantum efficiency and permit improvement of image quality and contrast using display windowing and measured energy information. Results are presented on the performance of a prototype GMD imaging system operated with a xenon/methane 90/10 gas mixture at 1 atm. Results are also presented on the performance of a GMD filled with tissue equivalent gases for applications in the field of radiation dosimetry in mixed neutron and γ fields. The results show that the GMD can be used for dosimetric discrimination between different types of radiation in mixed-field environments
Keywords :
X-ray imaging; diagnostic radiography; dosimetry; position sensitive particle detectors; proportional counters; digital X-ray imaging; gas microstrip detector; quantum efficiency; radiation dosimetry; tissue equivalent gas; xenon/methane gas mixture; Dosimetry; Energy measurement; Image quality; Microstrip; Optical imaging; Position measurement; Radiation detectors; X-ray detection; X-ray detectors; X-ray imaging;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
