{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T17:28:58Z","timestamp":1791134938310,"version":"4.1.0"},"reference-count":86,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2009,3,23]],"date-time":"2009-03-23T00:00:00Z","timestamp":1237766400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Medical Physics"],"published-print":{"date-parts":[[2009,4]]},"abstract":"<jats:p>The authors report on the performance of two small field of view, compact gamma cameras working in single photon counting in planar imaging tests at 122 and 140 keV. The first camera is based on a <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/mp1412-math-0003.png\" xlink:title=\"urn:x-wiley:00942405:media:mp1412:mp1412-math-0003\"\/> scintillator continuous crystal <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/mp1412-math-0004.png\" xlink:title=\"urn:x-wiley:00942405:media:mp1412:mp1412-math-0004\"\/> assembled with a flat panel multianode photomultiplier tube with parallel readout. The second one belongs to the class of semiconductor hybrid pixel detectors, specifically, a CdTe pixel detector <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/mp1412-math-0005.png\" xlink:title=\"urn:x-wiley:00942405:media:mp1412:mp1412-math-0005\"\/> with <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/mp1412-math-0006.png\" xlink:title=\"urn:x-wiley:00942405:media:mp1412:mp1412-math-0006\"\/> square pixels and a pitch of <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/mp1412-math-0007.png\" xlink:title=\"urn:x-wiley:00942405:media:mp1412:mp1412-math-0007\"\/>, read out by a CMOS single photon counting integrated circuit of the Medipix2 series. The scintillation camera was operated with selectable energy window while the CdTe camera was operated with a single low\u2010energy detection threshold of about 20 keV, i.e., without energy discrimination. The detectors were coupled to pinhole or parallel\u2010hole high\u2010resolution collimators. The evaluation of their overall performance in basic imaging tasks is presented through measurements of their detection efficiency, intrinsic spatial resolution, noise, image SNR, and contrast recovery. The scintillation and CdTe cameras showed, respectively, detection efficiencies at 122 keV of 83% and 45%, intrinsic spatial resolutions of 0.9 mm and <jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/mp1412-math-0008.png\" xlink:title=\"urn:x-wiley:00942405:media:mp1412:mp1412-math-0008\"\/>, and total background noises of 40.5 and 1.6 cps. Imaging tests with high\u2010resolution parallel\u2010hole and pinhole collimators are also reported.<\/jats:p>","DOI":"10.1118\/1.3081412","type":"journal-article","created":{"date-parts":[[2009,3,31]],"date-time":"2009-03-31T07:55:42Z","timestamp":1238486142000},"page":"1298-1317","source":"Crossref","is-referenced-by-count":34,"title":["Imaging performance comparison between a  scintillator based and a CdTe semiconductor based photon counting compact gamma camera"],"prefix":"10.1002","volume":"36","author":[{"given":"P.","family":"Russo","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"G.","family":"Mettivier","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R.","family":"Pani","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"R.","family":"Pellegrini","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"M. 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