TY  - JOUR
AU  - Grkovski, M.
AU  - Brzezinski, K.
AU  - Cindro, V.
AU  - Clinthorne, N. H.
AU  - Kagan, H.
AU  - Lacasta, C.
AU  - Mikuz, M.
AU  - Solaz, C.
AU  - Studen, A.
AU  - Weilhammer, P.
AU  - Zontar, D.
PY  - 2015
DA  - 2015//
TI  - Evaluation of a high resolution silicon PET insert module
T2  - Nucl. Instrum. Methods Phys. Res. A
JO  - Nuclear Instruments & Methods in Physics Research A
SP  - 86
EP  - 94
VL  - 788
PB  - Elsevier Science Bv
KW  - Positron emission tomography
KW  - Silicon detectors
KW  - PET insert
KW  - Image reconstruction
AB  - Conventional PET systems can be augmented with additional detectors placed in close proximity of the region of interest. We developed a high resolution PET insert module to evaluate the added benefit of such a combination. The insert module consists of two back-to-back 1 mm thick silicon sensors, each segmented into 1040 1 mm(2) pads arranged in a 40 by 26 array. A set of 16 VATAGP7.1 ASICs and a custom assembled data acquisition board were used to read out the signal from the insert module. Data were acquired in slice (20) geometry with a Jaszczak phantom (rod diameters of 12-4.8 mm) Filled with F-18-FDG and the images were reconstructed with ML-EM method. Both data with full and limited angular coverage from the insert module were considered and three types of coincidence events were combined. The ratio of high-resolution data that substantially improves quality of the reconstructed image for the region near the surface of the insert module was estimated to be about 4%. Results from our previous studies suggest that such ratio could be achieved at a moderate technological expense by using an equivalent of two insert modules (an effective sensor thickness of 4 mm).
SN  - 0168-9002
UR  - https://doi.org/10.1016/j.nima.2015.03.078
DO  - 10.1016/j.nima.2015.03.078
LA  - English
N1  - WOS:000354870700016
ID  - Grkovski_etal2015
ER  -