Design and clinical utility of a fan beam collimator for SPECT imaging of the head

B. M.W. Tsui, G. T. Gullberg, E. R. Edgerton, D. R. Gilland, J. R. Perry, W. H. McCartney

Research output: Contribution to journalArticlepeer-review


A long bore fan beam collimator for imaging the head was designed and constructed for a SPECT system with a rotating scintillation camera. In order to avoid the patient's shoulder during rotation of the camera with a thick camera housing, the long bore design is necessary to allow the collimator to get closer to the patient's head for improved spatial resolution. Operating at the minimum radius of rotation, the prototype fan beam collimator provides about the same spatial resolution as the high resolution collimator, while the geometric efficiency is equal to ~85% of that of the general purpose and ~55% higher than the high resolution collimator. Images from a phantom study demonstrate good image quality and are void of artifacts. Comparative clinical studies on temporomandibular joints (TMJ) between the LEGP and fan beam collimators also confirm the superior image quality obtained with the fan beam collimator.

Original languageEnglish (US)
Pages (from-to)810-819
Number of pages10
JournalJournal of Nuclear Medicine
Issue number6
StatePublished - Dec 1 1986
Externally publishedYes

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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