Simultaneous Acquisition of Quadrupolar Order and Double-Quantum23Na Signals

✍ Scribed by K.J. Jung; P.J. Cannon; J. Katz

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 101 KB
• Volume: 129
• Category: Article
• ISSN: 1090-7807
• DOI: 10.1006/jmre.1997.1267

✦ Synopsis

Na / with both residual quadrupolar coupling and biexponential with residual quadrupolar coupling. On the other hand, the relaxation contributes to the signal acquired from DQF-4, while double-quantum (DQ) signal in DQF-4 is derived mostly only Na / with residual quadrupolar coupling contributes to the from biexponential relaxation, with only part of the contribusignal acquired with the Jeener-Broekaert sequence. Since RF tion from quadrupolar coupling (12). Since the RF phases phases and flip angles for DQF-4 and Jeener-Broekaert sequences and flip angles for the J-B sequence are identical to those are identical, these different types of signals can be generated for DQF-4, both QO and DQ signals can be generated by simultaneously. A phase-cycling scheme is developed to differentithe same RF sequence. Here, a technique to acquire both ate the signals corresponding to residual quadrupolar coupling signals simultaneously and then to separate them into two and biexponential relaxation after the signals are acquired by use distinct signals is presented and verified experimentally. of the same RF sequences. This technique can maximize the attainable information from Na / in biological tissues in a given acquisition time.