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iDQC MRI weighted by longitudinal relaxation in the rotating frame

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iDQC MRI weighted by longitudinal relaxation in the rotating frame.htm (404bytes)
Date
2006-07
Author
Zheng, Bingwen
Chen, Zhong
陈忠
Kennedy, Scott D.
Zhong, Jianhui
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  • 化学化工-已发表论文 [14469]
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Abstract
A long-duration, low-power, off-resonance spin-locking pulse was incorporated into the COSY revamped by asymmetric z gradient-echo detection (CRAZED) pulse sequence in order to evaluate the effects of intermolecular double-quantum longitudinal relaxation in the tilted rotating frame (T-1p,DQ(eff)). This modified CRAZED sequence was followed by a standard fast spin-echo imaging sequence to form images with T-1p,DQ(eff)-weighted contrast. Imaging experiments were performed on an agarose-gel phantom and mouse-tail tissue at 600 MHz. Experimental results demonstrated the feasibility of imaging applications based on T-1p,DQ(eff) as a novel contrast mechanism, and showed that iDQC off-resonance longitudinal relaxation in the rotating frame T-1p,DQ(eff) is sensitive to the tilt angle theta and the effective spin-locking field omega(e). Imaging based on T-1p,DQ(eff) has reduced RF power deposition compared to on-resonance spin-locking, which is advantageous for human applications.
Citation
MAGNETIC RESONANCE IN MEDICINE,2006,56(2):327-333
URI
http://dx.doi.org/doi: 10.1002/mrm.20954
https://dspace.xmu.edu.cn/handle/2288/10120

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