Three-dimensional signal correction on UltraPeRL CZT detectors

KIM J., Donmez B., NELSON K., HE Z.

IEEE Nuclear Science Symposium/Medical Imaging Conference, Hawaii, Amerika Birleşik Devletleri, 26 Ekim - 03 Kasım 2007, ss.1289-1290 identifier identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Doi Numarası: 10.1109/nssmic.2007.4437237
  • Basıldığı Şehir: Hawaii
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Sayfa Sayıları: ss.1289-1290
  • Akdeniz Üniversitesi Adresli: Hayır

Özet

Three-dimensional signal correction on pixellated CdZnTe (CZT) detectors for the UltraPeRL project has been studied using Monte Carlo simulations. Each 2 cm x 2 em x 0.5 cm CZT detector has 8 X 8 pixellated anodes with a pitch of 2.4 mm. A depth and lateral correction algorithm has been developed in order to estimate both the depth of interaction (DOI) and the lateral position underneath the collecting pixel and therefore correct the signal amplitude. Using only the simple depth correction technique, the energy resolution can reach about 1.2% FWHM at 662 keV for single-pixel gamma-ray interactions. The relative detector-thickness photopeak efficiency is close to 79%. After lateral correction, the relative detector-thickness photopeak efficiency increased to about 88%, while the energy resolution changed little.