@Article{Grkovski_etal2015,
author="Grkovski, M.
and Brzezinski, K.
and Cindro, V.
and Clinthorne, N. H.
and Kagan, H.
and Lacasta, C.
and Mikuz, M.
and Solaz, C.
and Studen, A.
and Weilhammer, P.
and Zontar, D.",
title="Evaluation of a high resolution silicon PET insert module",
journal="Nuclear Instruments {\&} Methods in Physics Research A",
year="2015",
publisher="Elsevier Science Bv",
volume="788",
pages="86--94",
optkeywords="Positron emission tomography; Silicon detectors; PET insert; Image reconstruction",
abstract="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).",
optnote="WOS:000354870700016",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2232), last updated on Thu, 11 Jun 2015 20:18:08 +0000",
issn="0168-9002",
doi="10.1016/j.nima.2015.03.078",
opturl="https://doi.org/10.1016/j.nima.2015.03.078",
language="English"
}