MATERIALS AND METhODS Collimator Uniformity A specialrectilinearscanner was
employedto measurethe uniformity of collimators. This scanner is similar to a com mercially …

The diverging collimator gives a field of view that is large enough for practically all clinical
applications. It can be used with existing 10-in.-diameter cameras, thus largely eliminating …

Because the aim of this paper is to discuss the performance of the camera in terms of
parameters that are measured easily, the following definition of resolution will be used …

An experimental arrangement which permitted the parallel multihole collimator of a gamma
camera to be set in rotary motion during image formation was fabricated. Various test …

[en] In the choice of one collimator or type of collimator over another for scanning purposes,
either isoresponse curves or the geometric response to a point source has been previously …

A collimator consisting of a series of parallel slats has been constructed and used in
conjunction with a conventional gamma camera to collect one-dimensional projections of …

[en] Focused collimators for radioisotope scanning must be chosen according to their spatial
resolution as a function of source-to-collimator distance, their plane-source sensitivity, and …

A device employing a slit collimator which limits the angle of acceptance of the gamma-rays
in only one direction is introduced. Each point in the activity distribution is thus emitting into …

Two types of distortions are produced by the gamma camera. One is nonuniform sensitivity
re sponse over the detecting area. The second is spatial distortion; that is, the displacement …

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 …