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Improving spatial resolution in SPECT with the combination of PSPMT based detector and iterative reconstruction algorithms

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Improving spatial resolution in SPECT with the combination of PSPMT based detector and iterative reconstruction algorithms (EN)
Archimandritis, SC (EN)
Giokaris, ND (EN)
Varvarigou, D (EN)
Maintas, D (EN)
Nikita, KS (EN)
Loudos, GK (EN)
Uzunoglo, NK (EN)
Papanicolas, CN (EN)
journalArticle (EN)
2014-03-01T01:19:02Z
2003 (EN)
This paper investigates the possibility of developing a SPECT system that combines the high spatial resolution of position sensitive photomultiplier tubes (PSPMTs) with the excellent performance of iterative reconstruction algorithms. A small field of view (FOV) camera based on a PSPMT and a pixelized scintillation crystal made of CsI(TI) have been used for the acquisition of the projections. With the use of maximum likelihood expectation maximization (ML-EM) and ordered subsets expectation maximization (OSEM) slices of the object are obtained while three-dimensional (3D) reconstruction of the object is carried out using a modified marching cubes (MMC) algorithm. The spatial resolution of tomographic images obtained with the system was 2-3 mm. The spatial resolution of a conventional system that uses filtered backprojection (FBP) for slices reconstruction was more than 9 mm. (C) 2002 Elsevier Science Ltd. All rights reserved. (EN)
Radiology, Nuclear Medicine & Medical Imaging (EN)
crystal (EN)
Humans (EN)
Position sensitive photomultiplier tube (EN)
Tomography, Emission-Computed, Single-Photon (EN)
scintillation camera (EN)
SPECT (EN)
Image reconstruction (EN)
Photomultipliers (EN)
Tomography (EN)
priority journal (EN)
Imaging, Three-Dimensional (EN)
algorithm (EN)
single photon emission computer tomography (EN)
Maximum likelihood estimation (EN)
Gamma Cameras (EN)
image reconstruction (EN)
article (EN)
three dimensional imaging (EN)
Algorithms (EN)
Image Processing, Computer-Assisted (EN)
Cameras (EN)
Iterative algorithms (EN)
Phantoms, Imaging (EN)
Spatial resolution (EN)
intermethod comparison (EN)
Computerized Medical Imaging and Graphics (EN)
English
PERGAMON-ELSEVIER SCIENCE LTD (EN)
National Technical University of Athens
Digital Library of National Technical University of Athens | Dspace@NTUA
Κεντρική Βιβλιοθήκη Ε.Μ.Π.
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