Design and evaluation of a positron emission tomograph: HEADTOME III

Iwao Kanno*, Shuichi Miura, Seiichi Yamamoto, Hidehiro Iida, Matsutaro Murakami, Kazuhiro Takahashi, Kazuo Uemura

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

68 Citations (Scopus)


A high performance positron emission tomograph, HEADTOME HE with 480 bismuth germanate oxide detectors (13.4 x 25.0 x 40.0 mm), arranged in three rings of 750 mm diameter, with independent shadow masks and septa, is described. Image plane resolution at the center of the field of view (FOV) is 7.9 and 6.5 mm full width at half maximum (FWHM) in low resolution (LR) and high resolution (HR) mode, respectively. Axial resolution is 13.1, 11.3, and 9.1 mm FWHM at the center of FOV for direct planes of low quantitation (LQ). cross planes of LQ, and high quantitation (HQ) mode, respectively. Sensitivities evaluated by true events for a 6SGa 20 cm diameter cyclindrical pool were 34.5 (56.7), 16.4 (27.5), 19.4 and 9.5 keps (μCi/ml)-1 with the direct (cross) planes of LQLR, direct (cross) planes of LQHR. And direct planes of HQLR and HQHR, respectively. The fraction of scattered coincidence in a cold spot phantom after software correction is 2.5% in LRLQ mode. Count rate linearity after software correction is within 1% up to 50 x 103 true events per second per plane with LRLQ mode.

Original languageEnglish
Pages (from-to)931-939
Number of pages9
JournalJournal of Computer Assisted Tomography
Issue number5
Publication statusPublished - 1985
Externally publishedYes


  • Detectors
  • Emission computed tomography
  • Resolution
  • Scatter

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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