Title :
The effects of pulse pile-up on point-source measurements performed on different PET scanning devices
Author :
Badawi, R.D. ; Surti, S. ; Kemp, B. ; Zimmerman, R.E. ; El Fakhri, G. ; Holdsworth, C.H. ; Worstell, W.A.
Author_Institution :
Dana-Farber Cancer Inst., Harvard Med. Sch., Boston, MA, USA
Abstract :
We have quantified resolution and contrast loss as a function of noise-equivalent count rate on the GSO-based Philips Allegro and the pixelated NaI CPET2 using previously developed methodology involving the NEMA NU 2-2001 70 cm test phantom and a Na-22 point source. We found that at peak NEC, neither system showed significant loss of resolution. However, after accounting for event loss due to dead time, loss of contrast was seen in both systems.
Keywords :
phantoms; positron emission tomography; scintillation counters; GSO-based Philips Allegro; NEMA NU 2-2001; Na-22 point source; PET scanning devices; dead time; noise-equivalent count rate; peak NEC; pixelated NaI CPET2; point-source measurements; pulse pile-up; scintillation detectors; test phantom; Event detection; Gamma ray detection; Gamma ray detectors; Loss measurement; National electric code; Nuclear medicine; Performance evaluation; Positron emission tomography; Pulse measurements; Radiology;
Conference_Titel :
Nuclear Science Symposium Conference Record, 2003 IEEE
Print_ISBN :
0-7803-8257-9
DOI :
10.1109/NSSMIC.2003.1352418
