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1994 Fiscal Year Final Research Report Summary

Correcting corrupted-phases by blood perfusion, diffusion and body motion in MRI imaging.

Research Project

Project/Area Number 04650314
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 情報工学
Research InstitutionOsaka University

Principal Investigator

TAMURA Shinichi  Osaka University, Medical School, Professor, 医学部, 教授 (30029540)

Co-Investigator(Kenkyū-buntansha) HARADA Koushi  Osaka University, Medical School, Lecture, 医学部, 講師 (70156503)
NAITO Hiroaki  Osaka University, Medical School, Associate Professor, 医学部, 助教授 (60217627)
Project Period (FY) 1992 – 1994
KeywordsMRI / Perfusion and diffusion image / Body motion / Artifact correction / Phase correction
Research Abstract

When taking perfusion or diffusion images of small flow, artifact is easily caused by body motion. In this research, we developed artifact correction algorithms for translational, rotational, and expanding-shrinking body motions.
(1) Translational rigid body motion : Using the fact that Fourier transform F (x, n) of MRI signal f (x, n) in the n-th view (phase encode) shows the object position along the frequency axis (x), we corrected the corrupted phases by a body motion. We have also developed a method which can correct independently of x-axis the body motion alosng y-axis.
(2) Rotational rigid body motion : For a step rotation with unkown rot ation center and rotation angle, first we estimated the rotaion angle so that energy in outside region of the reconstructed image becomes minimum. Then we applied the phase retreaval algorithm to reduce the phase disturbance caused by the off-origin of the rotation center.
(3) Expanding-shrinking deformable body motion : In case of such as abdomen expanding and shrinking proportionally in x-and y-axs, we have shown that we can reduce the artifact by ; first obtain x-directional motion from the projection onto the frequency axis as the same as (1), and then correct phases corresponding to y-axis by the phase retreaval algorithm.
These algorithms can also be applied to the artifact correction caused by body motion of child and old person who cannot lay still for the image taking time of several to several ten minutes with conventional MRI.In order to make the algorithm more close to the practical use, it's a future task to model the more flexible motion with more number of freedom.

  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] 唐 力: "位相エンコーディング方向の体動によるMRIアーチファクトの除去" 信学論D-II. vol-J77-D-II No.5. 1009-1017 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 唐 力: "MRIにおける撮像断面内の平行移動によるアーチファクトの除去" Med.Imag.Tech.第12巻第3号. 231-240 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] RezaA.Zoroofi: "An improved method for MRI artifact correction due to translational motion" IEEE Trans Medical Imaging. (submitted).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] RezaA.Zoroofi: "MRI artifact cancellation due to rotational motion in the imaging plane" IEEE Trans Medical Imaging. (submitted).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Li Tang: "MRI artifact cancellation algorithms for 2-D translational motion" IEEE 1993 Nuclear Science Symposium and Medical Imaging Conference,San Francisco,California.6M07. Nov.4-6. 1489-1493 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Li Tang: "MRI artifact correction algorithms for motion in the image plane" ACCV,Osaka. Nov.23-25. 822-825 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 唐 力: "位相スペクトルの解析に基づくMRIの動きアーチファクトの除去" JAMIT'92研究報告. 41-47 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 田村 進一: "接線部の位相解析に基づくMRIの動きア-ティファクト除去" 第56回日医放物理学会大会2. 第53巻第8号. 78-78 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 唐 力: "MRIにおける2次元体動のアーチファクトの除去" 信学技報 PRU93-2,. Vol.93 No.49. 9-16 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Li Tang: "Cancellation of Motion Artifact in MRI" 医用画像工学研究会 JAMIT Frontier'94. 22.1-22.5 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Li Tang: "MRI artifact correction for 2D translational motion in the imaging plane" SPIE. (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Reza A.Zoroofi: "Reduction of MRI artifact due to rotational motion in the imaging" JAMIT Frontier'95(医用画像工学研究会). 7. 37-44 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Li Tang, Muneki Ohya, Yoshinobu Sato, Shinichi Tamura, Hiroaki Naito, Koushi Harada, and Takahiro Kozuka: ""Cancellation of artifact in MRI due to phase encoding axis motion"" "Trans. IEICE". vol.J77-D-II,5. 1009-1017 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Li Tang, Muneki Ohya, Yoshinobu Sato, Shinichi Tamura, Hiroaki Naito, Koushi Harada, and Takahiro Kozuka: ""Cancellation of MRI artifact due to translational motion in image plane"" Med.Imag.Tech.12. 231-240 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Reza Aghaeizadeh Zorrofi, Yoshinobu Sato, Shinichi Tamura, Hiroaki Naito, and Li Tang: ""An improved method for MRI artifact correction due to translational motion in the imaging plane"" IEEE Trans Medical Imaging. (submitted).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Reza Aghaeizadeh Zoroofi, Yoshinobu Sato, Shinichi Tamura, Hiroaki Naito, and Li Tang: ""MRI artifact cancellation due to rotational motion in the imaging plane"" IEEE Trans Medical Imaging. (submitted).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] L.Tang, M.Ohya, Y.Sato, S.tamura, H.Naito, K.Harada, and T.Kozuka: "MRI artifact cancellation algorithms for 2-D translational motion" IEEE 1993 IEEE Nuclear Science Symposium and Medical Imaging Conference, San Francisco, California. 6M07. 1489-1493 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Li Tang, Muneki Ohya, Yoshinobu Sato, Shinichi Tamura, Hiroaki Naito, Koushi Harada, and Takahiro Kozuka: ""MRI artifact correction algorithms for motion in the image plane"" ACCV,Osaka, Nov.23-25. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Li Tang, Muneki Ohya, Yoshinobu Sato, Shinichi Tamura, Hiroaki Naito, Koushi Harada, and Takahiro Kozuka: ""Artifact correction in MRI by phase spectrum analysis"" JAMIT Frontier'92. 41-47 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shinichi Tamura, Li Tang, Muneki Ohya, Yoshinobu Sato, Hiroaki Naito, Koushi Harada, and Takahiro Kozuka: ""Artifact correction in MRI by phase analysis on tangental line part"" The 65th Anual Meeting of Japanese Association of Radiological Physicists. 2, April 1 ・ 2. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Li Tang, Muneki Ohya, Yoshinobu Sato, Shinichi Tamura, Hiroaki Naito, Koushi Harada, and Takahiro Kozuka: ""MRI artifact cancellation algorithms for 2-D translational motion"" Technical Report of IEICE,PRU93-2. Vol.93, No.49. 9-16 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Li Tang, Muneki Ohya, Yoshinobu Sato, Shinichi Tamura, Hiroaki Naito, Koushi Harada, and Takahiro Kozuka: "JAMIT Frontier'94. 22.1-22.5 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] L.Tang, M.Ohya, Y.Sato, S.tamura, H.Naito, K.Harada, and T.Kozuka: ""MRI artifact correction for 2D translational motion in the imaging plane"" SPIE. (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Reza A.Zoroofi, Yoshinobu Sato, Shinichi Tamura, and Hiroaki Naito: ""Reduction of MRI Artifact due to Rotational Motion in the Imaging Plane"" JAMIT Frontier '95. 7. 37-44 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shinichi Tamura, Hiroaki Naito, Koushi Harada: ""Results of Grant-in-Aid for Scientific Research--Correcting corrupted-phases-phases by blood perfusion, diffusion and body motion in MRI iamging"" Innervision. Vol.10, No.7. (1995)

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

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Published: 1996-04-15  

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