Leckamwasam, D.2013-11-272013-11-271995Journal of the Ceylon College of Physicians, 28(1):p.74-78https://dl.nsf.gov.lk/handle/1/10033Medical SciencesSingle photon emission computed tomography - SPECTBrain functionDiagnostic techniquesClinical medicinePositron emission tomography - PETA