68Ga-EDTA Positron Emission Tomography in Cases with Brain Tumour
Since the first report by Moore in 1948, external counting with radioactive materials for localization of various intracranial lesions has proved a useful screening test. The technique is simple to perform, noninvasive, repeatable at short intervals and has high diagnostic accuracy. Gamma-ray emitting radionuclides have usually been used to locate intracranial lesions, but since 1951 positron emitting radionuclides have also been employed. With recent refinements of both hardware and analytical method, the system for transaxial reconstruction tomography using the positron annihilation coincidence detecting principle has been further developed to take advantage of depth-independent and depth-equal responses by back-to-back emission of 511 KeV gamma rays.
KeywordsPositron Emission Tomography Brain Tumour Regional Cerebral Blood Flow Focal Uptake High Density Area
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