Thanassas, D.Zioga, M.Mikeli, M.Rapsomanikis, A.-N.Stiliaris, E.The sensitivity and the spatial resolution of a small-field γ-Camera system based on a Position Sensitive Photomultiplier Tube (PSPMT) on a tomographic level are examined in this study. A cylindrical Gel-Phantom (d = 40 mm, h = 50 mm) with cylindro-conoidal tubes and capillaries (from 64 to 640 mm3 in volume) containing water solution of 99mTc is used as a test phantom in the present work. A total of 24 projections covering the full angle region (0°-360°) are obtained with the γ-Camera system under examination. The planar information is further analyzed to reconstruct the tomographic images taking into account all off-line corrections needed to remove barreloid deformations appearing at the edges of the Field-of- View. The reconstruction procedure is performed with iterative algorithms and for comparison reasons two different techniques (MLEM and accelerated ART) are used. The variety of the 99mTc-volumes in the phantom with the given specific radioactivity and the phantom axial asymmetry, due to the diÆerent radial distances of the tubes in the gel environment, allow a realistic characterization of the system’s performance on a tomographic level. Obtained experimental results for the system sensitivity and spatial resolution are presented and discussed in this work.application/pdfhttps://eproceedings.epublishing.ekt.gr/index.php/hnps/article/view/251610.12681/hnps.2516engHellenic Nuclear Physics Society (HNPS)Πνευματική ιδιοκτησία (c) 2019 A.-N. Rapsomanikis, M. Zioga, M. Mikeli, D. Thanassas, E. StiliarisAnnual Symposium of the Hellenic Nuclear Physics Society2654-00882654-007XAnnual Symposium of the Hellenic Nuclear Physics Society; Τόμ. 19 (2011): HNPS2011; 55-59HNPS Advances in Nuclear Physics; Vol. 19 (2011): HNPS2011; 55-59ARTMLEMTomographic Image ReconstructionSPECTγ-CameraSensitivity and Resolution Study of a Small-Field γ-Camera System on a Tomographic Levelinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion2020-01-01Πυρηνική φυσικήNuclear Physicsisi - Physics, Nuclear includes resources on the study of nuclear structure, decay, radioactivity, reactions, and scattering. Resources in this category focus on low-energy physics. High-energy physics is covered in the PHYSICS, PARTICLES & FIELDS category.Άρθρο συνεδρίουConference articleΕπιστημονικό άρθροScientific articleHellenic Nuclear Physics SocietyGreek Aggregator OpenArchives.gr | National Documentation Centre (EKT)other