Magnetic field imaging using ct technique — roi reconstruction system

Hideo Saito, Ken'Ichi Fujita, Masato Makajima

Research output: Contribution to journalArticle

Abstract

This paper proposes a method to visualize the spatial distribution of the magnetic field in the region of interest (ROI), using CT technique. An experimenal system is constructed to visualize the magnetic field in ROI. In the reconstruction of the distribution in general by the CT technique, the projection data should not contain data outside the region of reconstruction. In the visualization of the magnetic field by CT techniques proposed up to the present, however, the projection data containing the magnetic field distribution outside the region of reconstruction are contained in the measurement. Consequently, the technique has been applied only to the case where the magnetic field exists only inside ROI. This paper proposes the following method. Wires for detecting the magnetic field are placed in the region of reconstruction. It is noted that the projection data obtained from the induced voltage does not contain the magnetic field distribution outside the region of reconstruction. This property is utilized in the visualization of the magnetic field distribution in the region of reconstruction. This paper describes also the principle of the fore‐mentioned methods, as well as the ROI visualization system constructed based on the principle. Using the proposed method, result of visualization is shown for magnetic field distribution produced by a permanent magnet.

Original languageEnglish
Pages (from-to)93-104
Number of pages12
JournalSystems and Computers in Japan
Volume24
Issue number5
DOIs
Publication statusPublished - 1993

Keywords

  • Computer tomography
  • electromagnetic induction
  • magnetic field distribution
  • magnetic field measurement
  • reconstruction

ASJC Scopus subject areas

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

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