کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5407763 | 1393229 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fast proton spin-lattice relaxation time in the rotating frame during the application of time averaged precession frequency
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A relatively rapid phase alternation of the effective field in the time averaged precession frequency (TAPF) sequence results in averaging of the proton RF spin-lock field. The spin-locking of the proton magnetization becomes less efficient and thus shortens T1ÏH, the proton spin-lattice relaxation time in the rotating frame. The relaxation time also depends on the ratio of Ï1 and Ï2 intervals i.e. Ï1/Ï2 and not only on the number of Ïc = Ï1 + Ï2 blocks, i.e. the number of the phase transients. Experiments are performed on solid samples of ferrocene and glycine and for some time intervals, T1ÏH is shortened by factors of 9-100 compared to the relaxation times obtained in the standard experiment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetic Resonance - Volume 181, Issue 2, August 2006, Pages 336-341
Journal: Journal of Magnetic Resonance - Volume 181, Issue 2, August 2006, Pages 336-341
نویسندگان
Zoran D. ŽujoviÄ, Graham A. Bowmaker,