Direct comparison of fluorine-18-FDG SPECT, fluorine-18-FDG PET and rest thallium-201 SPECT for detection of myocardial viability - Burt, RW; Perkins, OW; Oppenheim, BE; Schauwecker, DS; Stein, L; Wellman, HN; Witt, RM (J Nucl Med, 1995)