METHODS While both lead and tantalum tubes are available, we have found the latter to be
the material of choice. The relevant physical characteristics of the two ele ments are …

MATERIALS AND METHODS Systems description. The imaging systems studied were a
Pho/Gamma III scintillation camera, initially with conventional S-11 phototubes and later with …

METHOD A geometrical phantom3 (Fig. 1) has been constructed that is easy to re produce.
With a circular saw grooves are cut into a 10 mm thick rectangular Lucite plate 30-by 30-cm …

A collimator is essentially a block of lead larger than the detector, containing an
arrangement of holes which allows gamma rays to pass through from a specified direction …

This is the final article in a four-part continuing education series on scintillation camera
technology. After studying this article the reader should be able to: 1) understand the …

The design and use of parallel-channel collimators with the s cintillatio!'.. camera are
described. Equations for calculating the optimum hole diameter, length,. and septal …

The performance characteristics of 5 scintillation cameras were compared: Searle 19, Searle
37, Ohio Nuclear, Picker 2C and Toshiba GCA 202. Inherent characteristics including spatial …

We have performed studies using the 4,000-hole and 1,000-hole collimator provided with
the Nuclear Chicago Pho-Gamma III scintillation camera and a@ mTcsource similar to that …

Many radioactive isotopes decay with the emission of low-energy photons, which are either
(a) gamma rays or (b) x rays emitted subsequent to electron capture or internal conversion. It …

MATERIALS AND METHODS The LFOV has 37 photomultiplier tubes with a useful field of
view of 15.25 in. using parallel-hole collimation. Several low-energy collimators, both …