III. PRELIMINARY RESULTS
A single R5900-M64 PSPMT was instrumented with a
CsI(Tl) scintillator array and installed in the barrel-gantry.
Preliminary SPECT reconstruction images were obtained to
test the high-resolution imaging capability of the system. The
I-125 images were generated as we have described elsewhere
[4] by determining the center-of-gravity (COG) of the signal
from the X and Y anode signals.