Pinhole collimators are widely used to image small organs and animals. The sensitivity of
knife-edge pinhole collimators has been previously estimated using an" effective diameter" …

131I radionuclide therapy studies have not shown a strong relationship between tumor
absorbed dose and response, possibly due to inaccuracies in activity quantification and …

To account for photon penetration, the formulas used to calculate the geometric resolution of
a pinhole collimator use an equivalent diameter d/sub e/rather than the physical diameter of …

A method is presented to estimate the acquisition geometry of a pinhole single photon
emission computed tomography (SPECT) camera with a circular detector orbit. This …

Accurate estimation of the 3D in vivo activity distribution is important for dose estimation in
targeted radionuclide therapy (TRT). Although SPECT can potentially provide such …

Polymerization of amyloid-β peptide (Aβ) into amyloid fibrils is a critical step in the
pathogenesis of Alzheimer's disease (AD). Inhibition of Aβ aggregation and destabilization …

Pinhole collimators are widely used to image small organs and animals. The pinhole
response function (PRF) of knife-edge pinhole collimators has been estimated previously …

Results Ten patients (8 female; 2 male) aged from 50 to 83 years presenting with a
metastatic progressive WD-GEP-NET (7 small intestine, 2 pancreas, 1 rectum) were …

The sensitivity of a pinhole collimator for gamma ray imaging in nuclear medicine is
dependent on the angle of incidence of the gamma rays. The effect of penetration near the …

Pinhole collimators are widely used to image small organs and small animals because
sensitivity and resolution improve as the distance between the aperture and the object …