Evaluation of a high resolution silicon PET insert module Journal Article
| Authors: | Grkovski, M.; Brzezinski, K.; Cindro, V.; Clinthorne, N. H.; Kagan, H.; Lacasta, C.; Mikuž, M.; Solaz, C.; Studen, A.; Weilhammer, P.; Žontar, D. |
| Article Title: | Evaluation of a high resolution silicon PET insert module |
| 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 mm2 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 (2D) geometry with a Jaszczak phantom (rod diameters of 1.2-4.8 mm) filled with 18F-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). © 2015 Elsevier B.V. All rights reserved. |
| Keywords: | positron emission tomography; image processing; high resolution; image reconstruction; silicon; region of interest; image segmentation; silicon detectors; data acquisition; pet insert; close proximity; data acquisition board; high resolution data; high-resolution pet; pet inserts; reconstructed image |
| Journal Title: | Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |
| Volume: | 788 |
| ISSN: | 0168-9002 |
| Publisher: | Elsevier Science BV |
| Date Published: | 2015-07-11 |
| Start Page: | 86 |
| End Page: | 94 |
| Language: | English |
| DOI: | 10.1016/j.nima.2015.03.078 |
| PROVIDER: | scopus |
| PMCID: | PMC7650022 |
| PUBMED: | 33173251 |
| DOI/URL: | |
| Notes: | Export Date: 4 May 2015 -- Source: Scopus |
