Hwang T L, van Zijl P C, Garwood M
Department of Radiology and Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, 217 Traylor Building, Baltimore, Maryland, 21205, USA.
J Magn Reson. 1998 Jul;133(1):200-3. doi: 10.1006/jmre.1998.1441.
Despite the advantages of compensation for resonance offset and B1 inhomogeneity, adiabatic pulses are not yet in general use in high-resolution NMR, often because of the conception that these pulses require longer time or increased power to perform. We show that adiabatic pulses with tangential frequency sweeps and other frequency-modulation functions can be optimized to accomplish 13C and 1H broadband inversion using pulse lengths of 192 and 64 micro(s), respectively, at B1 strengths available with modern high-resolution probes.
尽管补偿共振偏移和B1不均匀性有诸多优点，但绝热脉冲在高分辨率核磁共振中尚未得到广泛应用，这通常是因为人们认为这些脉冲需要更长的时间或更高的功率才能发挥作用。我们表明，具有切向频率扫描和其他频率调制功能的绝热脉冲可以进行优化，以便在现代高分辨率探头所具备的B1强度下，分别使用192微秒和64微秒的脉冲长度来实现13C和1H宽带反转。
