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Orientational dependence of intermolecular double quantum coherence (iDQC) signal from tendon tissue
Author(s) -
Ozus Bahadir,
Clarke Geoffrey D.,
Dodd Stephen J.,
Fullerton Gary D.
Publication year - 2005
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.20436
Subject(s) - intermolecular force , coherence (philosophical gambling strategy) , pulse sequence , nuclear magnetic resonance , signal (programming language) , dipole , spectroscopy , tendon , relaxation (psychology) , pulse (music) , chemistry , quantum , transverse plane , molecular physics , physics , optics , molecule , anatomy , biology , quantum mechanics , organic chemistry , neuroscience , detector , computer science , programming language
The proton signal changes as the long axis of tendon tissue is rotated with respect to the main magnetic field ( B 0 ). The orientational changes in the tendon signal obtained using the correlation spectroscopy revamped by asymmetric z ‐gradient echo detection (CRAZED) sequence, which allows the effects of intermolecular dipolar interactions to be observed, were investigated and compared with the orientational changes of the signals produced using correlation spectroscopy (COSY), spin‐echo (SE), and one‐pulse sequences. The intermolecular double quantum coherence (iDQC) signal obtained using the CRAZED sequence showed a variation in the signal from tendon tissue, with sharper peaks and greater relative differences between minimum and maximum signal values compared to the variations in the signal obtained from the COSY, SE, and one‐pulse sequences. This result is attributed to the orientational dependence of the transverse relaxation rate of single (SQC) and double (DQH) quantum coherences R 2 and R 2,2 , respectively. Magn Reson Med 53:1183–1186, 2005. © 2005 Wiley‐Liss, Inc.