Magnetic resonance imaging method and device

Details Magnetic resonance imaging method and device Magnetic resonance imaging method and device

2005-04-26

2005-04-26

Robinson, Daniel (Department: 3742)

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

Reexamination Certificate

active

06885885

ABSTRACT:
A magnetic resonance imaging apparatus has means for detecting the movement of an object so as to correct the variation of the non-uniformity of static magnetic field because of the movement of the object and thereby to improve the quality of the MR image. When actually measured data is corrected by using a signal for correcting the static magnetic field obtained in a preliminary measurement, the influence of the non-uniformity of static magnetic field is eliminated from the image based on the information from the body movement detecting means by using a correcting signal measured at the same time phase of the periodic movement as that of the actually measured signal. A navigation echo measured during the same repetition time as that of the actually measured signal is used for detection of time phase by detecting means. As a result, the quality of image is not deteriorated by the variation of the non-uniformity of static magnetic field due to the movement of the body of the object, realizing imaging of high quality image.

REFERENCES:
patent: 6118273 (2000-09-01), Takizawa et al.
patent: 6242914 (2001-06-01), Yoshitome
patent: 6541970 (2003-04-01), Takizawa et al.
patent: 6704594 (2004-03-01), Blank et al.

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