LONGITUDINAL ECT IMAGING USING gamma -RAY CAMERA.

Satoshi Iwata, Masato Nakajima, Shinichi Yuta, Koichi Ogawa

Research output: Contribution to journalArticle

Abstract

Single-photon emission CT, a radioisotope (RI) is injected into the body and by external detection of the radiated gamma -ray the RI distribution on an arbitrary layer (slice) is reconstructed from the data, permitting visual representation of physiological information. In Longitudinal imaging, the object is regarded as composed of layered RI distributions. From the gamma -ray projection data obtained by gamma -ray detectors placed parallel to the layer, the RI distribution at each slice is reconstructed. However, the projection data are observed only along a particular direction and the working range of the detector is restricted, leading to blur and degradation of the reconstructed image. This paper discusses the quality degradation inherent in longitudinal imaging and proposes a reconstruction algorithm which employs the contour information of the object in the reconstruction computation to make correction for the quality. The result of a numerical simulation is also reported.

Original languageEnglish
Pages (from-to)11-19
Number of pages9
JournalSystems and Computers in Japan
Volume17
Issue number10
Publication statusPublished - 1986 Oct
Externally publishedYes

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Radioisotopes
Gamma rays
Imaging techniques
Detectors
Degradation
Photons
Computer simulation

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Hardware and Architecture
  • Information Systems
  • Theoretical Computer Science

Cite this

Iwata, S., Nakajima, M., Yuta, S., & Ogawa, K. (1986). LONGITUDINAL ECT IMAGING USING gamma -RAY CAMERA. Systems and Computers in Japan, 17(10), 11-19.

LONGITUDINAL ECT IMAGING USING gamma -RAY CAMERA. / Iwata, Satoshi; Nakajima, Masato; Yuta, Shinichi; Ogawa, Koichi.

In: Systems and Computers in Japan, Vol. 17, No. 10, 10.1986, p. 11-19.

Research output: Contribution to journalArticle

Iwata, S, Nakajima, M, Yuta, S & Ogawa, K 1986, 'LONGITUDINAL ECT IMAGING USING gamma -RAY CAMERA.', Systems and Computers in Japan, vol. 17, no. 10, pp. 11-19.
Iwata S, Nakajima M, Yuta S, Ogawa K. LONGITUDINAL ECT IMAGING USING gamma -RAY CAMERA. Systems and Computers in Japan. 1986 Oct;17(10):11-19.
Iwata, Satoshi ; Nakajima, Masato ; Yuta, Shinichi ; Ogawa, Koichi. / LONGITUDINAL ECT IMAGING USING gamma -RAY CAMERA. In: Systems and Computers in Japan. 1986 ; Vol. 17, No. 10. pp. 11-19.
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