The Use of Band Filtering in Multidimensional NMR. Evaluation of Two “User-Friendly” Techniques

✍ Scribed by Christian Roumestand; Joël Mispelter; Christelle Austruy; Daniel Canet

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 231 KB
• Volume: 109
• Category: Article
• ISSN: 1064-1866
• DOI: 10.1006/jmrb.1995.0004

✦ Synopsis

The advantages of band-filtering schemes, based on the selection tivity to RF field inhomogeneity, entailing some difficulties of an inversion profile, over selective 90Њ excitation pulse are prein the practical implementation of these band-selective sented. The performances of two ''user-friendly'' methods based pulses.

on such a scheme, DANTE-Z and Spin Pinging, are evaluated.

In the present paper, we evaluate two different selective As expected, the two methods give similar results, but, among schemes which retain the performances of the BURP pulse other things, DANTE-Z is easier to implement on a ''routine'' in terms of selectivity and phase purity, but which enable spectrometer than Spin Pinging and is less sensitive to relaxation us to simplify their implementation such as the only calibraphenomena, especially those related to T 2 . Moreover, the advantion to perform is that of a conventional p/2 hard pulse.

tages of using high-power pulse-width-modulated DANTE trains instead of low-power ''soft'' pulse are emphasized. In association with DANTE-Z or Spin Pinging, this alternative avoids the tedious CHOICE OF THE SELECTIVE EXCITATION SCHEME calibration of BURP pulses and amounts to the calibration of a conventional p/2 ''hard'' pulse.