Design concepts and preliminary performances of stationary sampling whole-body high-resolution positron emission tomograph: HEADTOME IV

I. Kanno, H. Iida, S. Miura, S. Yamamoto, M. Amano, Y. Hirose, M. Murakami, K. Takahashi, H. Sasaki, F. Shishido, A. Inugami, K. Uemura

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Design concepts and preliminary performances of a stationary sampling high-resolution whole-body positron emission tomograph, HEADTOME IV, were reported. The system comprises four layers of detector ring which consists of 768 BGO crystals with 3 mm width, 96 photomultiplier tubes arrayed on 825 mm circle. A sufficiently fine sampling-interval allows data sampling without scan motion along the transaxial plane. But an axial motion (Z-motion) is installed to interlace between adjacent planes. Preliminary performance characteristics were an in-plane resolution of 4.5 mm in full width at half maximum (FWHM), and axial resolution of 9.5 mm in FWHM, sensitivities of 14 and 24 kcps/(μCi/ml) for direct and cross planes, respectively, with 20 cm diam. cylindrical flood phantom. A large scale cache memory prepared for each plane allows a realtime correction for the deadtime and the radionuclide decay, and a realtime calculation of the rate constants using the weighted integral method.

Original languageEnglish
Pages (from-to)477-485
Number of pages9
JournalKaku igaku. The Japanese journal of nuclear medicine
Volume26
Issue number4
Publication statusPublished - 1989
Externally publishedYes

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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