S. Webb et al., GEOMETRIC EFFICIENCY OF A ROTATING SLIT-COLLIMATOR FOR IMPROVED PLANAR GAMMA-CAMERA IMAGING, Physics in medicine and biology, 38(5), 1993, pp. 627-638
This note derives several expressions for the geometric efficiency of
a rotating collimator, comprising a set of parallel slits, for a gamma
camera. These expressions represent approximate analytic formulae und
er specific geometric conditions for which an algebraic analysis can b
e made. The expressions are limiting cases and have been validated by
numerical computation for some specific cases.