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Title:
MAGNETIC RESONANCE IMAGING APPARATUS AND MAGNETIC RESONANCE IMAGING METHOD
Document Type and Number:
Japanese Patent JP2006223630
Kind Code:
A
Abstract:

To actualize high-speed imaging and obtain a characteristic data of a subject with high accuracy by improving a sensitivity of a spin to the angle frequency.

A high-frequency magnetic field of a flip angle α calculated by an equality (1) of α=TR/(T1×T2)1/2 in which TR is time of reputation, T1 is the vertical relaxation time, and T2 is the horizontal relaxation time, is applied at a short time TR for the static state of both of the horizontal and the vertical magnetization of the spin of the subject. Each gradient magnetic field is applied to make the time integral value zero in TR at each gradient magnetic field of a slice selecting direction Gs, a phase encoding direction Gp, and a frequency encoding direction Gr.


Inventors:
ABE SHINICHI
Application Number:
JP2005042032A
Publication Date:
August 31, 2006
Filing Date:
February 18, 2005
Export Citation:
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Assignee:
UNIV KYOTO
International Classes:
A61B5/055; G01R33/48
Domestic Patent References:
JPS6244238A1987-02-26
JPS6244238A1987-02-26
Foreign References:
US20030030435A12003-02-13
US20030030435A12003-02-13
Other References:
JPN6010043936, S. Y. LEE and Z. H. CHO, "Fast SSFP Gradient Echo Sequence for Simultaneous Acquisitions of FID and Echo Signals", MAGNETIC RESONANCE IN MEDICINE, 198810, vol.8, no.2, pp.142−150
JPN6010043937, Jeff H. Duyn, "Steady State EfEects in Fast Gradient Echo Magnetic Resonance Imaging", MAGNETIC RESONANCE IN MEDICINE, 199704, vol.37, no.4, pp.559−568
Attorney, Agent or Firm:
Takahisa Sato



 
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