Title :
Radiation response characteristics of amorphous silicon arrays for megavoltage radiotherapy imaging
Author :
Antonuk, L.E. ; Yorkston, J. ; Huang, Wei ; Boudry, J. ; Morton, Edward J. ; Longo, M.J. ; Street, R.A.
Author_Institution :
Dept. of Radiat. Oncol., Michigan Univ. Med. Center, Ann Arbor, MI, USA
Abstract :
Signal measurements for a variety of pixelated a-Si:H imaging arrays irradiated by megavoltage beams are reported. Data are presented for 6-, 10-, and 15-MV beam energies for screens containing gadolinium-oxysulfide and calcium tungstate. These results are the first quantitative radiation signal sizes reported for such arrays. In addition, the initialization times of these arrays are reported. The performances of arrays of various sizes and pitches with respect to these measured values are compared. These results are part of an ongoing effort to develop flat-panel, real-time gamma and X-ray imagers.<>
Keywords :
biomedical equipment; radiation therapy; 6 to 15 MV; X-ray imagers; array performance; flat-panel real-time imagers; gamma imagers; initialization times; megavoltage beam irradiation; megavoltage radiotherapy imaging; pixelated a-Si:H imaging arrays; quantitative radiation signal sizes; radiation response characteristics; signal measurements; Amorphous silicon; Biomedical imaging; Calcium; Collaboration; Image quality; Medical diagnostic imaging; Optical imaging; Pixel; Sensor arrays; X-ray imaging;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE
Conference_Location :
Santa Fe, NM, USA
Print_ISBN :
0-7803-0513-2
DOI :
10.1109/NSSMIC.1991.259245
