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Sensitivity and Resolution Study of a Small-Field γ-Camera System on a Tomographic Level

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Hellenic Nuclear Physics Society   

Αποθετήριο :
Annual Symposium of the Hellenic Nuclear Physics Society  | ΕΚΤ eProceedings   

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Sensitivity and Resolution Study of a Small-Field γ-Camera System on a Tomographic Level (EN)
Thanassas, D.
Zioga, M.
Mikeli, M.
Rapsomanikis, A.-N.
Stiliaris, E.
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
2020-01-01
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. (EN)
ART (EN)
MLEM (EN)
Tomographic Image Reconstruction (EN)
SPECT (EN)
γ-Camera (EN)
Annual Symposium of the Hellenic Nuclear Physics Society
Αγγλική γλώσσα
Hellenic Nuclear Physics Society (HNPS) (EN)
2654-0088
2654-007X
Annual Symposium of the Hellenic Nuclear Physics Society; Τόμ. 19 (2011): HNPS2011; 55-59 (EL)
HNPS Advances in Nuclear Physics; Vol. 19 (2011): HNPS2011; 55-59 (EN)
Πνευματική ιδιοκτησία (c) 2019 A.-N. Rapsomanikis, M. Zioga, M. Mikeli, D. Thanassas, E. Stiliaris (EL)
Hellenic Nuclear Physics Society
Annual Symposium of the Hellenic Nuclear Physics Society
Oral contributions



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