Depth of interaction resolution measurements for a high resolution PET detector using position sensitive avalanche photodiodes

Physics in Medicine and Biology
Yongfeng YangS R Cherry

Abstract

We explore dual-ended read out of LSO arrays with two position sensitive avalanche photodiodes (PSAPDs) as a high resolution, high efficiency depth-encoding detector for PET applications. Flood histograms, energy resolution and depth of interaction (DOI) resolution were measured for unpolished LSO arrays with individual crystal sizes of 1.0, 1.3 and 1.5 mm, and for a polished LSO array with 1.3 mm pixels. The thickness of the crystal arrays was 20 mm. Good flood histograms were obtained for all four arrays, and crystals in all four arrays can be clearly resolved. Although the amplitude of each PSAPD signal decreases as the interaction depth moves further from the PSAPD, the sum of the two PSAPD signals is essentially constant with irradiation depth for all four arrays. The energy resolutions were similar for all four arrays, ranging from 14.7% to 15.4%. A DOI resolution of 3-4 mm (including the width of the irradiation band which is approximately 2 mm) was obtained for all the unpolished arrays. The best DOI resolution was achieved with the unpolished 1 mm array (average 3.5 mm). The DOI resolution for the 1.3 mm and 1.5 mm unpolished arrays was 3.7 and 4.0 mm respectively. For the polished array, the DOI resolution was only 16...Continue Reading

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Citations

Feb 16, 2011·Annals of Biomedical Engineering·Emilie Roncali, Simon R Cherry
May 8, 2008·Physics in Medicine and Biology·S Surti, J S Karp
Aug 13, 2008·Physics in Medicine and Biology·Tom K Lewellen
Aug 30, 2008·Physics in Medicine and Biology·Abhijit J ChaudhariRamsey D Badawi
Dec 23, 2008·Physics in Medicine and Biology·Yongfeng YangSimon R Cherry
Mar 5, 2009·Physics in Medicine and Biology·Huini DuSimon R Cherry
Dec 2, 2010·Physics in Medicine and Biology·Yongfeng YangSimon R Cherry
Sep 8, 2011·Physics in Medicine and Biology·Yongfeng YangSimon R Cherry
May 15, 2012·Physics in Medicine and Biology·Felipe GodinezRamsey D Badawi
Jul 24, 2010·AJR. American Journal of Roentgenology·Thomas K Lewellen
Jun 17, 2008·Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine·Yongfeng YangSimon R Cherry
Aug 22, 2007·Radiology·Martin S JudenhoferBernd J Pichler
Oct 29, 2014·Radiological Physics and Technology·Fumihiko NishikidoTaiga Yamaya
Mar 12, 2013·Physics in Medicine and Biology·Emilie Roncali, Simon R Cherry
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Mar 21, 2019·Physics in Medicine and Biology·Zhonghua KuangYongfeng Yang
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