![]() ![]() Rollo and Schulz (1971), and Sanders et al. (1969), and Beck and Harper (1966), have examined the effects of energy selection to establish the optimum window setting for 99Tc m brain scanning. (b) a low base-line settng to maximize the countrate at the expense of image contrast and resolution. (a) the use of a high base-line energy, resulting in reduced sensitivity because of rejection of unscattered photons, or With only a single energy channel available in a rectilinear scanner or gamma camera, a choice must be made between ![]() However, with low energy isotopes such as 99TC m the limited energy resolution of scintillators allows only imperfect discrimination against scattered photons. Energy discrimination can substantially reduce the effects of scatter in radiosotope imaging. ![]() In many radiological imaging situations photon scattering leads to degradation of image quality. ![]()
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