Investigation of depth-of-interaction by pulse shape discrimination in multicrystal detectors read out by avalanche photodiodes Export

@article{citeulike:3276994, abstract = {The measurement of depth of interaction (DOI) within detectors is necessary to improve resolution uniformity across the FOV of small diameter PET scanners. DOI encoding by pulse shape discrimination (PSD) has definite advantages as it requires only one readout per pixel and it allows DOI measurement of photoelectric and Compton events. The PSD time characteristics of various scintillators were studied with avalanche photodiodes (APD) and the identification capability was tested in multi-crystal assemblies with up to four scintillators. In the PSD time spectrum of an APD-GSO/LSO/BGO/CsI(Tl) assembly, four distinct time peaks at 45, 26, 88 and 150 ns relative to a fast test pulse, having resolution of 10.6, 5.2, 20 and 27 ns, can be easily separated. Whereas the number and position of scintillators in the multi-crystal assemblies affect detector performance, the ability to identify crystals is not compromised. Compton events have a significant effect on PSD accuracy, suggesting that photopeak energy gating should be used for better crystal identification. However, more sophisticated PSD techniques using parametric time-energy histograms can also improve crystal identification in cases where PSD time or energy discrimination alone is inadequate. These results confirm the feasibility of PSD DOI encoding with APD-based detectors for PET}, author = {Saoudi, A. and Pepin, C. M. and Dion, F. and Bentourkia, M. and Lecomte, R. and Andreaco, M. and Casey, M. and Nutt, R. and Dautet, H.}, booktitle = {Nuclear Science, IEEE Transactions on}, citeulike-article-id = {3276994}, citeulike-linkout-0 = {http://dx.doi.org/10.1109/23.775563}, citeulike-linkout-1 = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=775563}, doi = {10.1109/23.775563}, journal = {Nuclear Science, IEEE Transactions on}, keywords = {apd, crystal, detector, discrimination, doi, pulse}, number = {3}, pages = {462--467}, posted-at = {2008-09-17 00:32:41}, priority = {2}, title = {Investigation of depth-of-interaction by pulse shape discrimination in multicrystal detectors read out by avalanche photodiodes}, url = {http://dx.doi.org/10.1109/23.775563}, volume = {46}, year = {1999} }

TY - JOUR ID - citeulike:3276994 L3 - citeulike-article-id:3276994 N2 - The measurement of depth of interaction (DOI) within detectors is necessary to improve resolution uniformity across the FOV of small diameter PET scanners. DOI encoding by pulse shape discrimination (PSD) has definite advantages as it requires only one readout per pixel and it allows DOI measurement of photoelectric and Compton events. The PSD time characteristics of various scintillators were studied with avalanche photodiodes (APD) and the identification capability was tested in multi-crystal assemblies with up to four scintillators. In the PSD time spectrum of an APD-GSO/LSO/BGO/CsI(Tl) assembly, four distinct time peaks at 45, 26, 88 and 150 ns relative to a fast test pulse, having resolution of 10.6, 5.2, 20 and 27 ns, can be easily separated. Whereas the number and position of scintillators in the multi-crystal assemblies affect detector performance, the ability to identify crystals is not compromised. Compton events have a significant effect on PSD accuracy, suggesting that photopeak energy gating should be used for better crystal identification. However, more sophisticated PSD techniques using parametric time-energy histograms can also improve crystal identification in cases where PSD time or energy discrimination alone is inadequate. These results confirm the feasibility of PSD DOI encoding with APD-based detectors for PET IS - 3 JF - Nuclear Science, IEEE Transactions on EP - 467 TI - Investigation of depth-of-interaction by pulse shape discrimination in multicrystal detectors read out by avalanche photodiodes VL - 46 T2 - Nuclear Science, IEEE Transactions on SP - 462 KW - apd KW - crystal KW - detector KW - discrimination KW - doi KW - pulse AU - Saoudi, A AU - Pepin, CM AU - Dion, F AU - Bentourkia, M AU - Lecomte, R AU - Andreaco, M AU - Casey, M AU - Nutt, R AU - Dautet, H PY - 1999/// UR - http://dx.doi.org/10.1109/23.775563 ER -