title: Absorbed fractions for dose calculations of neuroreceptor PET studies.
abstract: A simple Monte Carlo program was constructed for the purpose of calculating absorbed fractions of relevance to neurologic positron-emission-tomography studies. The caudate, putamen, and cerebellum regions of the brain were mathematically modeled to serve as source regions for the absorbed-fraction calculations for positron-annihilation photons. The target organs were the caudate, putamen, cerebellum, brain, spine portion in the head, skull, and head. Absorbed fractions were also calculated for a uniform ring source which encircled the head phantom.
mesh_terms: D000042:Absorption; D001921:Brain / Q000000981:diagnostic imaging* / Q000378:metabolism; D002421:Caudate Nucleus / Q000378:metabolism; D002531:Cerebellum / Q000378:metabolism; D006801:Humans; D008433:Mathematics; D008961:Models, Structural; D009010:Monte Carlo Method; D011699:Putamen / Q000378:metabolism; D011829:Radiation Dosage; D011868:Radioisotopes; D011954:Receptors, Dopamine / Q000378:metabolism; D012886:Skull / Q000378:metabolism; D013131:Spine / Q000378:metabolism; D014055:Tomography, Emission-Computed
chemical_list: D011868:Radioisotopes; D011954:Receptors, Dopamine