ATTENUATION CORRECTION METHOD FOR SINGLE-PHOTON EMISSION CT WITHOUT ANY ADDITIONAL DATA COLLECTION.

Ritsu Kusaba, Masato Nakajima, Koichi Ogawa, Shinichi Yuta, Tatsuru Morozumi

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This paper considers the single-photon emission CT (SPECT) for the object containing a large spatial variation of gamma -ray absorption distribution, and proposes a new correction method for the effect of attenuation. In the past corrections of the image degradation by attenuation in the SPECT source distribution image, it is necessary to have an a priori knowledge about the attenuation distribution within the object. However, it should be noted that the emission data measured on the opposite side are not the same when the object has attenuation. By utilizing this property, it seems possible to acquire both the source distribution and the attenuation distribution from the measured emission data. The proposed method is based on this idea, and while estimating in parallel the source distribution and the attenuation distribution from the measured emission data, makes a correction of the source distribution. A practical and clinical application of the method is expected. As a result of numerical simulation, it was verified that the proposed method is effective even when the emission data contain a noise of the level usually observed in a clinical siuation.

Original languageEnglish
Pages (from-to)64-71
Number of pages8
JournalSystems and Computers in Japan
Volume18
Issue number12
Publication statusPublished - 1987 Dec
Externally publishedYes

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Photons
Gamma rays
Degradation
Computer simulation

ASJC Scopus subject areas

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

Cite this

Kusaba, R., Nakajima, M., Ogawa, K., Yuta, S., & Morozumi, T. (1987). ATTENUATION CORRECTION METHOD FOR SINGLE-PHOTON EMISSION CT WITHOUT ANY ADDITIONAL DATA COLLECTION. Systems and Computers in Japan, 18(12), 64-71.

ATTENUATION CORRECTION METHOD FOR SINGLE-PHOTON EMISSION CT WITHOUT ANY ADDITIONAL DATA COLLECTION. / Kusaba, Ritsu; Nakajima, Masato; Ogawa, Koichi; Yuta, Shinichi; Morozumi, Tatsuru.

In: Systems and Computers in Japan, Vol. 18, No. 12, 12.1987, p. 64-71.

Research output: Contribution to journalArticle

Kusaba, R, Nakajima, M, Ogawa, K, Yuta, S & Morozumi, T 1987, 'ATTENUATION CORRECTION METHOD FOR SINGLE-PHOTON EMISSION CT WITHOUT ANY ADDITIONAL DATA COLLECTION.', Systems and Computers in Japan, vol. 18, no. 12, pp. 64-71.
Kusaba, Ritsu ; Nakajima, Masato ; Ogawa, Koichi ; Yuta, Shinichi ; Morozumi, Tatsuru. / ATTENUATION CORRECTION METHOD FOR SINGLE-PHOTON EMISSION CT WITHOUT ANY ADDITIONAL DATA COLLECTION. In: Systems and Computers in Japan. 1987 ; Vol. 18, No. 12. pp. 64-71.
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