Use of the pinhole collimator for imaging the posterior fossa on brain scans.
D001921:Brain; D002648:Child; D002675:Child, Preschool; D003388:Cranial Fossa, Posterior; D006801:Humans; D007223:Infant; D011858:Radiographic Magnification; D011877:Radionuclide Imaging / Q000295:instrumentation*; D012886:Skull