Magnetic resonance imaging needing a long waiting time...

Details Magnetic resonance imaging needing a long waiting time... Magnetic resonance imaging needing a long waiting time...

2001-11-15

2009-11-24

Le, Long V (Department: 3768)

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

C600S410000

Reexamination Certificate

active

07623901

ABSTRACT:
In the black blood method using a double inversion pulse, images in the systole of the cardiac cycle can be captured in a reliable manner even in the presence of a cycle-to-cycle variance in the heart beat cycle. A pulse sequence of the black blood method composed of a double inversion pulse DIV and an imaging pulse train SEQimais used. This sequence is applied in sync with an ECG signal of a subject to be imaged, and magnetic resonance imaging is thereby performed. The double inversion DIV is applied in sync with an R-wave:R1appearing on the ECG signal at a given timing, with a first delay time td1(fixed value), and the imaging pulse train SEQimais applied in sync with the following R-wave:R2with a second delay time td2(fixed value: set in accordance with the systole). A variance of the cardiac cycle is absorbed in an inversion time BBTI.

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Simonetti et al., “‘Black Blood’, T2-Weighted Inversion-Recovery MR Imaging of the Heart”, Radiology, vol. 199, No. 1, 49-57, Apr. 1996.

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