CORRECTION METHOD FOR COLLIMATOR EFFECT OF ECT.

Satoshi Iwata, Chiaki Yoshida, Masato Nakajima, Koichi Ogawa, Shinichi Yuta

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

One of the factors in the deterioration of the reconstructed image of the single-photon emission CT (SPECT) is the respective characteristics of the collimator used in the detection of the gamma -ray. The characteristics depend on the shape and material of the collimator, and produce shift-variant blurs on the reconstructed image. This kind of error cannot be eliminated by the deconvolution, which regards the blur as shift-invariant. This paper discusses the effect in the spatial frequency domain, and it is shown that the effect of the blur by collimator can be approximated analytically by a shift-invariant blur on the annular ring determined for each frequency. A method of improving the quality of the reconstructed image is proposed utilizing this property.

Original languageEnglish
Pages (from-to)43-50
Number of pages8
JournalSystems and Computers in Japan
Volume17
Issue number4
Publication statusPublished - 1986 Apr
Externally publishedYes

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Deconvolution
Gamma rays
Deterioration
Photons

ASJC Scopus subject areas

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

Cite this

Iwata, S., Yoshida, C., Nakajima, M., Ogawa, K., & Yuta, S. (1986). CORRECTION METHOD FOR COLLIMATOR EFFECT OF ECT. Systems and Computers in Japan, 17(4), 43-50.

CORRECTION METHOD FOR COLLIMATOR EFFECT OF ECT. / Iwata, Satoshi; Yoshida, Chiaki; Nakajima, Masato; Ogawa, Koichi; Yuta, Shinichi.

In: Systems and Computers in Japan, Vol. 17, No. 4, 04.1986, p. 43-50.

Research output: Contribution to journalArticle

Iwata, S, Yoshida, C, Nakajima, M, Ogawa, K & Yuta, S 1986, 'CORRECTION METHOD FOR COLLIMATOR EFFECT OF ECT.', Systems and Computers in Japan, vol. 17, no. 4, pp. 43-50.
Iwata S, Yoshida C, Nakajima M, Ogawa K, Yuta S. CORRECTION METHOD FOR COLLIMATOR EFFECT OF ECT. Systems and Computers in Japan. 1986 Apr;17(4):43-50.
Iwata, Satoshi ; Yoshida, Chiaki ; Nakajima, Masato ; Ogawa, Koichi ; Yuta, Shinichi. / CORRECTION METHOD FOR COLLIMATOR EFFECT OF ECT. In: Systems and Computers in Japan. 1986 ; Vol. 17, No. 4. pp. 43-50.
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