Title:
MAGNETIC RESONANCE IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2016/178413
Kind Code:
A1
Abstract:
Provided are a gradient magnetic field pulse in a new shape and having an effect in suppressing noise, and an MRI device that executes a pulse sequence including the gradient magnetic field pulse. The MRI device of the present invention is provided with: a magnetic field application unit that applies high frequency magnetic field pulses and gradient magnetic field pulses in accordance with a pulse sequence describing the timing and the applied strength of the high frequency magnetic field pulses and the gradient magnetic field pulses; and a receiving unit for receiving nuclear magnetic resonance signals generated from a test object because of the magnetic field applied by the magnetic field application unit. The shape of at least one type of the gradient magnetic field pulses included in the pulse sequence is a shape that minimizes noise and is obtained under a condition that the shape satisfies the slew rate of the gradient magnetic field at the magnetic field application unit.
Inventors:
KUROKAWA SHINJI (JP)
TANIGUCHI YO (JP)
YAMAMOTO YUKARI (JP)
OCHI HISAAKI (JP)
TANIGUCHI YO (JP)
YAMAMOTO YUKARI (JP)
OCHI HISAAKI (JP)
Application Number:
PCT/JP2016/063421
Publication Date:
November 10, 2016
Filing Date:
April 28, 2016
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
A61B5/055; G01R33/32; G01R33/385
Foreign References:
| JP2015198818A | 2015-11-12 | |||
| JP2015231417A | 2015-12-24 | |||
| JP2008302102A | 2008-12-18 |
Other References:
SEGBERS,MARCEL: "Shaping and Timing Gradient Pulses to Reduce MRI Acoustic Noise", MAGNETIC RESONANCE IN MEDICINE, vol. 64, 2010, pages 546 - 553, XP055326185
HEISMANN, BJÖRN: "Sequence-Based Acoustic Noise Reduction of Clinical MRI Scans", MAGNETIC RESONANCE IN MEDICINE, vol. 73, March 2015 (2015-03-01), pages 1104 - 1109, XP002742892
HEISMANN, BJÖRN: "Sequence-Based Acoustic Noise Reduction of Clinical MRI Scans", MAGNETIC RESONANCE IN MEDICINE, vol. 73, March 2015 (2015-03-01), pages 1104 - 1109, XP002742892
Attorney, Agent or Firm:
Sannozaka Patent Law Firm (JP)
Patent business corporation The Sanno hill patent firm (JP)
Patent business corporation The Sanno hill patent firm (JP)
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