Title :
Radiation response characteristics of amorphous silicon arrays for megavoltage radiotherapy imaging
Author :
Antonuk, L.E. ; Yorkston, J. ; Huang, W. ; Boudry, J. ; Morton, E.J. ; Longo, M.J. ; Street, R.A.
Author_Institution :
Dept. of Radiat. Oncology, Michigan Univ. Med. Center, Ann Arbor, MI, USA
fDate :
8/1/1992 12:00:00 AM
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 quantitative radiation signal sizes reported for such arrays. The initialization times of these arrays are reported. The performance of arrays of various sizes and pitches with respect to these measured values is compared. These results are part of an ongoing effort to develop flat-panel, real-time gamma and X-ray imagers
Keywords :
biomedical equipment; hydrogen; radiation therapy; semiconductor counters; silicon; 6 to 15 MV; X-ray imagers; amorphous Si:H arrays; initialization times; megavoltage beams; megavoltage radiotherapy imaging; real time gamma imaging; Amorphous silicon; Biomedical imaging; Calcium; Collaboration; Image quality; Medical diagnostic imaging; Optical imaging; Pixel; Readout electronics; X-ray imaging;
Journal_Title :
Nuclear Science, IEEE Transactions on
