• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1996 Fiscal Year Final Research Report Summary

Development of a dual fanbeam gamma ray TCT system for quantitative myocardial SPECT

Research Project

Project/Area Number 07457202
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Radiation science
Research InstitutionKeio University, School of Medicine

Principal Investigator

KUBO Atsushi  Keio Univ., School of Med., Dept.of Radiology, Professor, 医学部, 教授 (90051771)

Co-Investigator(Kenkyū-buntansha) OGAWA Koichi  Hosei Univ., College of Eng., Dept.of EE., Associate Prof., 工学部, 助教授 (00158817)
NAKAJIMA Masato  Keio Univ., Faculty of Sci.and Eng., Dept.of EE., Professor, 理工学部, 教授 (20051766)
HASHIMOTO Jun  Keio Univ., School of Med., Dept.of Radiology, Assistant, 医学部, 助手 (20228414)
MITAMURA Hideo  Keio Univ., School of Med., Dept.of Internal Med., Associate Prof., 医学部, 助教授 (70129675)
OGAWA Satoshi  Keio Univ., School of Med., Dept.of Internal Med., Professor, 医学部, 教授 (90124940)
Project Period (FY) 1995 – 1996
KeywordsSingle Photon Emission CT / Fanbeam collimator / Gamma camera / Transmission CT / Myocardial imaging / Truncation / Image Reconstruction / Image Processing
Research Abstract

In order to reconstruct the quantitative SPECT images, it is necessary to correct attenuation of the gamma rays in the body, therefore, it is desired to obtain a true atenuation map measured by gamma-ray transmission CT.Many methods and geometries of the gamma-ray transmission data acquisition system have been proposed, however, there is a limitation in the size of the scintillator and this causes a serious artifact in reconstructed images of thorax. We propose a new geometry to acquire gamma-ray transmission CT data using fanbeam collimators. In the proposed data acquisition system, we use two detectors for the acquisition of gamma-ray transmission data. The two detectors equipped with the fanbeam collimator of the same focal length rotate together around the patient body. An external gamma-ray line source located at the focal point of the fanbeam collimators rotates simultaneously as the rotation of the detectors. From the two planar images acquired by two detectors, we make an ideal transmission data having large field of view. The size of the ideal field of view can be controlled by the focal length of the fanbeam collimators. If the detector length is 40cm and the focal length changes from 50cm to 60cm, the radius of the effective field of view increases from 13.5cm to 14.4cm using a single detector. On the other hand, if we use the proposed data acquisition geometry, the radius increases from 19.2cm to 23.5cm, respectively. From the basic results, we made some simulations by changing the focal length and the detector size, and confirmed the effectivity of the proposed method. In summary, the proposed method could enlarge the field of view using an ordinary scintillator with smal size significantly, and the truncation of projection data was eliminated perfectly.

  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 尾川浩一: "SPECTにおけるγ線透過型CTの有効視野の拡大" 核医学. 33(9). 975-979 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 橋本 順: "散乱、吸収補正による心筋SPECTの定量化" 核医学. 33(9). 1015-1019 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Jun Hashimoto: "Scatter and attenuation correction in Technetium-99m Brain SPECT" J.Nucl.Med.38(1). 157-162 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Jun Hashimoto: "Scatter and attenuation correction in brain SPECT imaging" Medical Review. 59. 1-8 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Koichi Ogawa: "A proposal of dual fanbeam gamma ray transmission data acquisition for quantiatative SPECT" J.Nucl.Med.36(5). 172 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 山本浩也: "定量的SPECT画像再構成のためのγ線透過型CTの視野拡大に関する研究" 第26回画像工学コンファレンス論文集. 167-169 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 橋本 順: "散乱、吸収補正による脳SPECTの定量化" 核医学. 32(12). 1369-1374 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Koichi Ogawa: "A proposal of dual fanbeam gamma ray transmission data acquisition for quantitative SPECT" J.Nucl.Med. vol.36, No.5. 172 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Jun Hashimoto: "Quantitative brain SPECT imaging with scatter and attenuation compensation" Japanese Journal of Nucl.Med.vol.32, No.12. 1369-1374 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Koya Yamamoto: "Enlargement of the field of view in gamma ray transmission CT for quantitative SPECT" Proc.of the 26th Joint Conf.on Imaging Technology. 167-169 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Koichi Ogawa: "Enlargement of the field of view in gamma ray transmission CT using a fan-beam geometry" Japanese Journal of Nucl.Med.vol.33, No.9. 975-979 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Jun Hashimoto: "Scatter and attenuation correction for quantitative myocardial SPECT" Japanese Journal of Nucl.Med.vol.33, No.92. 1015-1019 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Jun Hashimoto: "Scatter and attenuation correction in Technetium-99m Brain SPECT" J.Nucl.Med.vl.38, No.1. 157-162 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Jun Hashimoto: "Scatter and attenuation correction in brain SPECT imaging" Medical Review. No.59. 1-8 (1997)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1999-03-09  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi