TY - GEN
T1 - Characterization of highly pixelated CZT detectors for sub-millimeter PET imaging
AU - Yin, Yongzhi
AU - Komarov, Sergey
AU - Wu, Heyu
AU - Song, Tae Yong
AU - Li, Qiang
AU - Garson, Alfred
AU - Lee, Kuen
AU - Simburger, Garry
AU - Dowkontt, Paul
AU - Krawczynski, Henric
AU - Tai, Yuan Chuan
PY - 2009
Y1 - 2009
N2 - Cadmium Zinc Telluride (CZT) detectors with 600 μm pitches and 350 μm pitches in 5mm thickness were developed and tested for investigation pixilated CZT detector applications in Positron Emission Tomography. In addition to flood γ-ray source measurements (662keV, 122keV and 59.5keV), we scan across pixels with a collimated Co-57 source (collimated beam size < pixel size) with a step size 50 μm. We sorted events based on the number of pixels that detect a charge signal (single, double, triple) and analyzed the charge sharing at different energies for detectors of different pitches. Results show the number of charge sharing events increases when γ-ray energy increases or when pixel size decreases. Based on the collimated beam measurements of energy at 122keV, the charge sharing range in a 5mm thick CZT detector biased at -1000V was estimated to be around 125μm FWHM for both 600μm and 350μm pitched anodes, while the charge loss is more severe in 350μm pitched detectors than in 600μm pitched detectors.
AB - Cadmium Zinc Telluride (CZT) detectors with 600 μm pitches and 350 μm pitches in 5mm thickness were developed and tested for investigation pixilated CZT detector applications in Positron Emission Tomography. In addition to flood γ-ray source measurements (662keV, 122keV and 59.5keV), we scan across pixels with a collimated Co-57 source (collimated beam size < pixel size) with a step size 50 μm. We sorted events based on the number of pixels that detect a charge signal (single, double, triple) and analyzed the charge sharing at different energies for detectors of different pitches. Results show the number of charge sharing events increases when γ-ray energy increases or when pixel size decreases. Based on the collimated beam measurements of energy at 122keV, the charge sharing range in a 5mm thick CZT detector biased at -1000V was estimated to be around 125μm FWHM for both 600μm and 350μm pitched anodes, while the charge loss is more severe in 350μm pitched detectors than in 600μm pitched detectors.
UR - http://www.scopus.com/inward/record.url?scp=77951175220&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2009.5402160
DO - 10.1109/NSSMIC.2009.5402160
M3 - Conference contribution
AN - SCOPUS:77951175220
SN - 9781424439621
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 2411
EP - 2414
BT - 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009
T2 - 2009 IEEE Nuclear Science Symposium Conference Record, NSS/MIC 2009
Y2 - 25 October 2009 through 31 October 2009
ER -