RCT Image Study by Angular Interval of Sampling

A multi-purpose gamma camera system which had 2 detectors of opposed position and was capable of radionuclide computed tomography (RCT) imaging was installed in Division of Nuclear Medicine, Chiba Cancer Center Hospital. In this study, the variance of RCT image due to the angular interval of samplin...

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Veröffentlicht in:RADIOISOTOPES 1982/06/15, Vol.31(6), pp.297-301
Hauptverfasser: AKIYAMA, Yoshihisa, YUI, Nobuharu, KINOSHITA, Fujimi, KOAKUTSU, Masaki, TABUSHI, Katsuyoshi, SAKATA, Suoh
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Sprache:jpn
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Zusammenfassung:A multi-purpose gamma camera system which had 2 detectors of opposed position and was capable of radionuclide computed tomography (RCT) imaging was installed in Division of Nuclear Medicine, Chiba Cancer Center Hospital. In this study, the variance of RCT image due to the angular interval of sampling was analized. The full width at half maximum (FWHM) and full width at tenth maximum (FWTM) of point source were almost same for all sampling intervals investigated. The distortion of RCT images with uniform activity source could not be detected even for larger intervals. When the RCT images were obtained using a phantom contained 3 line sources and a bar phantom for RCT which were located at right angle with the plane of reconstruction, the images did not change between 1° and 6° of sampling interval, but for 9° or more the distortion of images occured explicity. For our system, sampling interval of 2° was predicted from the theorectical calculation considering both resolution and statistical noise. But, results from the phantom studies of present work showed that sampling interval of 6° was sufficient to reconstruct RCT images without distortion, and could be applicable to dynamic RCT images.
ISSN:0033-8303
1884-4111
DOI:10.3769/radioisotopes.31.6_297