CONTINUOUS MODE SPECT IN ^<123>I MIBG MYOCARDIAL SCINTIGRAPHY : AN EVALUATION

Abstract

Continuous-mode SPECT is a method of data acquisition, in which the detectors are continuously rotated. The total conuts of SPECT images with continuous-mode SPECT increased 1.17 times greater compared with step-mode SPECT, because the former method can collect data without delay. The increased information resulted in improvement of the signal-to-noise ratio and resolution, and the influence of activity of surrounding organs on the target organ was reduced. When radionuclide decay during data acquisition was observed, the dacay in counts was less with continuous-mode SPECT (2.2%) than with step-mode SPECT (3.3%). Since smaller sampling angles were available in continuous-mode SPECT, the artifacts dependent on angles could be reduced.