DISCUSSION For a fixed-diameter NaI (Tl) crystal, the useful field of view of a system with a
converging colli mator will decrease as the magnification increases. Because of this field-of …

METHOD FOR REDUCING THE ENERGY DEPENDENCE OF THE RESOLUTION OF
FOCUSED COLLIMATORS Page 1 Where the septa of focused collimators are thick enough to …

A Variable Angle Slant-Hole Collimator Page 1 A Variable Angle Slant-Hole Collimator
Richard H. Moore, Nathaniel M. Alpert, and H. William Strauss Massachusetts General …

Three low-energy multihole converging collimators were evaluated in reference to accepted
imaging parameters using a prototype large-field-of-view scintillation camera. A substantial …

[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 …

Distortion is intrinsic to converging collimator scintiphotography although converging
collimation offers improved resolution and sensitivity. The nature of the distortion is defined …

The design of a “depth independent” collimator for use with 99m Tc is discussed. Since this
is a novel design, not available commercially, experimental measurements of line spread …

Magnification is an indispensable technique in pediatric nuclear medicine that is used to
improve the relatively low resolution characteristics of gamma cameras typically equipped …

Higher resolution in brain scanning is achieved by the use of magnifying or converging
collimators compared with the resolution obtainable using standard parallel-hole …

This Supplement covers rectilinear scanner collimators only, and contains the complete line
spread function (LSF) and modulation transfer function (MTF) data synopsized in Table 2 of …