Two recent publications (1, 2) in the Journal of Nuclear Medicine have discussed the loss of
spatial resolution in positron imaging devices due to the varying range of posi trons of …

Three letters in Vol. 17 of this Journal have discussed the effects of positron range and
annihilation-angle spread (ie deviations from 180Â) on the resolution limit of posi tron …

MUEHLLEHNER energy band as Compton events. Figure 1, Curve B shows the energy
spectrum of a point source sur rounded by Scattering material, the difference be tween …

Developments in positron emission tomography (PET) technology have resulted in systems
with finer detector elements designed to further improve spatial resolution. However, there is …

In recent times there has been renewed interest in scintigraphic imaging of positron emitters,
particu larly in connection with three-dimensional tomogra phy using positron annihilation …

[en] The capability to reconstruct both longitudinal or transverse tomographic slices with the
positron camera system affords unique advantages. The longitudinal tomographic mode …

(FWHM) ofthe count profile (line-spread function) through the reconstructed image ofa line
source (1). Several variables (often unspecified) can affect the FWHM. First, as the diameter …

The goal of positron emission tomography (PET) is to generate images of the distribution of
positron emitters in vivo. PET systems rely on the detection of annihilation gamma rays that …

Recording the chronology of nuclear medicine instrumentation poses some difficult
decisions as does the determination of the “father” of nuclear medicine?. Historians can …

312 Objectives: With SPECT using stationary NaI detectors and highly focussed multi-
pinhole (HFMP) collimators (U-SPECT-I & II) sub-half mm resolution images can be …