Lesion detectability as a function of pulse-height selection for dynamic imaging with 99mTc.

Previous studies on pulse-height selection for scintillation cameras have been concerned with static imaging or asymmetric window settings around the photo peak. For count densities typical of those encountered in flow studies and for the customary symmetric window it is shown here, both computationally and experimentally, that a window setting in the range of 25-35% provides the maximum lesion detectability rate for lesions of 0.5- to 2.0-cm diameter.