FASTSPECT: electrical and mechanical design of a high-resolution dynamic SPECT imager

W. P. Klein, H. H. Barrett, I. W. Pang, D. D. Patton, M. M. Rogulski, J. D. Sain, W. E. Smith

Research output: Contribution to conferencePaper

Abstract

FASTSPECT is an imaging system designed for dynamic 3-D SPECT imaging of the brain. The system is based on 24 stationary modular cameras with a pinhole aperture structure having between 24 and 150 pinholes. Each camera is composed of 4 PMTs and a NaI(Tl) crystal. The original system has been replaced with a new gantry designed for use in a clinical environment. This opportunity was taken to add improved imaging capabilities. First, rotation of the aperture is now possible to acquire extra projections for static images. Second, high frame rates are obtainable by reducing dead-time between frames through distributed processing by assigning one Inmos T804 Transputer with 16 MB of RAM to each camera. Third, photomultiplier signals are now digitized to 8 bits instead of the previously used 5 bits. This additional ability allows different position-estimation schemes, including neural networks. The improved frame-rate capabilities have opened consideration of research in such areas as first-pass ventricular SPECT. Phantom studies have shown that sufficient counts can be collected in 1/20th second to reconstruct a full 3-D ventricular image. The new distributed electronics allows rapid data handling, so cardiac studies at 20 frames/sec are feasible.

Original languageEnglish (US)
Pages931-933
Number of pages3
StatePublished - Dec 1 1995
EventProceedings of the 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 3) - San Francisco, CA, USA
Duration: Oct 21 1995Oct 28 1995

Other

OtherProceedings of the 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 3)
CitySan Francisco, CA, USA
Period10/21/9510/28/95

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ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

Cite this

Klein, W. P., Barrett, H. H., Pang, I. W., Patton, D. D., Rogulski, M. M., Sain, J. D., & Smith, W. E. (1995). FASTSPECT: electrical and mechanical design of a high-resolution dynamic SPECT imager. 931-933. Paper presented at Proceedings of the 1995 IEEE Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 3), San Francisco, CA, USA, .