Depth of interaction measurement in gamma ray imaging detectors with continuous scintillation crystals Export

@inproceedings{citeulike:3278752, abstract = {A design for an inexpensive depth of interaction (DOI) detector for gamma rays, suitable for nuclear medical applications, especially positron emission tomography (PET), has been developed, studied by simulations and tested experimentally. The detector consists of a continuous LSO-scintillator of dimensions 42/spl times/42/spl times/10 mm/sup 3/ and a new compact large-area (49/spl times/49 mm/sup 2/) position sensitive photo-multiplier (PSPMT) H8500 from Hamamatsu. Since a continuous crystal is used, the scintillation light distribution is not destroyed and its first 3 moments can be used to determine the energy (0th moment), the centroids along the x- and y-direction (1st moments) and the depth of interaction (DOI), which is strongly correlated to the distribution's width and thus its standard deviation (2nd moment). The simultaneous computation of these moments allows a three-dimensional reconstruction of the position of interaction of the /spl gamma/-rays within the scintillating crystal and will be realized by a modified position sensitive proportional (PSP) resistor network. No additional photo detectors or scintillating crystals are needed. According to previous Monte Carlo simulations which estimated the influence of Compton scattering for 511 keV /spl gamma/-rays, the transport of the scintillation light within the detector assembly and also the behavior of the modified PSP resistor network, we expect a spatial resolution of /spl lsim/ 2 mm and a DOI resolution of /spl ap/ 5 mm. The first experimental results presented here yield an intrinsic spatial resolution of /spl lsim/ 1.8 mm and 2.6 mm for the x- and y-direction respectively and a DOI resolution /spl lsim/ 1 cm. Further we measured an energy resolution of 12\%-18\%.}, author = {Lerche, Ch and Benlloch, J. M. and Sanchez, F. and Pavon, N. and Gimenez, E. N. and Gimenez, M. and Fernandez, M. and Cerda, J. and Martinez, J. and Sebastia, A.}, booktitle = {Nuclear Science Symposium Conference Record, 2003 IEEE}, citeulike-article-id = {3278752}, citeulike-linkout-0 = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1352310}, journal = {Nuclear Science Symposium Conference Record, 2003 IEEE}, keywords = {crystal, detector, doi, gamma-ray, imaging, scintillator}, pages = {2169--2173 Vol.3}, posted-at = {2008-09-17 02:51:18}, priority = {2}, title = {Depth of interaction measurement in gamma ray imaging detectors with continuous scintillation crystals}, url = {http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1352310}, volume = {3}, year = {2003} }

TY - CONF ID - citeulike:3278752 L3 - citeulike-article-id:3278752 N2 - A design for an inexpensive depth of interaction (DOI) detector for gamma rays, suitable for nuclear medical applications, especially positron emission tomography (PET), has been developed, studied by simulations and tested experimentally. The detector consists of a continuous LSO-scintillator of dimensions 42/spl times/42/spl times/10 mm/sup 3/ and a new compact large-area (49/spl times/49 mm/sup 2/) position sensitive photo-multiplier (PSPMT) H8500 from Hamamatsu. Since a continuous crystal is used, the scintillation light distribution is not destroyed and its first 3 moments can be used to determine the energy (0th moment), the centroids along the x- and y-direction (1st moments) and the depth of interaction (DOI), which is strongly correlated to the distribution's width and thus its standard deviation (2nd moment). The simultaneous computation of these moments allows a three-dimensional reconstruction of the position of interaction of the /spl gamma/-rays within the scintillating crystal and will be realized by a modified position sensitive proportional (PSP) resistor network. No additional photo detectors or scintillating crystals are needed. According to previous Monte Carlo simulations which estimated the influence of Compton scattering for 511 keV /spl gamma/-rays, the transport of the scintillation light within the detector assembly and also the behavior of the modified PSP resistor network, we expect a spatial resolution of /spl lsim/ 2 mm and a DOI resolution of /spl ap/ 5 mm. The first experimental results presented here yield an intrinsic spatial resolution of /spl lsim/ 1.8 mm and 2.6 mm for the x- and y-direction respectively and a DOI resolution /spl lsim/ 1 cm. Further we measured an energy resolution of 12%-18%. JF - Nuclear Science Symposium Conference Record, 2003 IEEE EP - 2173 Vol.3 TI - Depth of interaction measurement in gamma ray imaging detectors with continuous scintillation crystals VL - 3 T2 - Nuclear Science Symposium Conference Record, 2003 IEEE SP - 2169 KW - crystal KW - detector KW - doi KW - gamma-ray KW - imaging KW - scintillator AU - Lerche, Ch AU - Benlloch, JM AU - Sanchez, F AU - Pavon, N AU - Gimenez, EN AU - Gimenez, M AU - Fernandez, M AU - Cerda, J AU - Martinez, J AU - Sebastia, A PY - 2003/// UR - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1352310 ER -