Title:
MAGNETIC RESONANCE IMAGE DIAGNOSING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2000/032107
Kind Code:
A1
Abstract:
A burst wave (91) is applied as an RF magnetic field so as to excite hydrogen nuclei, a gradient magnetic field (95) gradient in the read direction is applied, and thus magnetization in strips is achieved. Thereafter an RF magnetic field pulse (92) for magnetization reversal for selecting a slice is applied, and a signal (97) is measured while applying a read-out gradient magnetic field (96). The timing at which a spin echo is generated is made different from that at which a gradient magnetic field echo is generated so as to the signal reflects the phase rotation due to chemical shift. The MR signal (97) is subjected to two-dimensional Fourier transform, the phase distribution is found from the real and imaginary parts of complex data after the Fourier transform, and the distribution is converted to a temperature change distribution and displayed. The temperature change of the diseased part resultant from IVMR is monitored in real time.
Inventors:
SHIMIZU HIROMICHI (JP)
WATANABE SHIGERU (JP)
WATANABE SHIGERU (JP)
Application Number:
PCT/JP1999/006797
Publication Date:
June 08, 2000
Filing Date:
December 03, 1999
Export Citation:
Assignee:
HITACHI MEDICAL CORP (JP)
SHIMIZU HIROMICHI (JP)
WATANABE SHIGERU (JP)
SHIMIZU HIROMICHI (JP)
WATANABE SHIGERU (JP)
International Classes:
A61B5/055; G01N24/00; G01R33/48; G06T1/00; (IPC1-7): A61B5/055; G01R33/485
Foreign References:
| JPH09262219A | 1997-10-07 | |||
| JPH08252231A | 1996-10-01 | |||
| JPH09168524A | 1997-06-30 | |||
| JPS61205853A | 1986-09-12 | |||
| JPH02241432A | 1990-09-26 |
Attorney, Agent or Firm:
Asamura, Kiyoshi (New Ohtemachi Building 2-1, Ohtemachi 2-chome Chiyoda-ku Tokyo, JP)
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