Application of Optimal Control to CPMG Refocusing Pulse Design

Physics – Quantum Physics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

23 pages, 10 figures; Revised and reformatted version with new title and significant changes to Introduction and Conclusions s

Scientific paper

10.1016/j.jmr.2010.09.003

We apply optimal control theory (OCT) to the design of refocusing pulses suitable for the CPMG sequence that are robust over a wide range of B0 and B1 offsets. We also introduce a model, based on recent progress in the analysis of unitary dynamics in the field of quantum information processing (QIP), that describes the multiple refocusing dynamics of the CPMG sequence as a dephasing Pauli channel. This model provides a compact characterization of the consequences and severity of residual pulse errors. We illustrate the methods by considering a specific example of designing and analyzing broadband OCT refocusing pulses of length 10 t180 that are constrained by the maximum instantaneous pulse power. We show that with this refocusing pulse, the CPMG sequence can refocus over 98% of magnetization for resonance offsets up to 3.2 times the maximum RF amplitude, even in the presence of +/- 10% RF inhomogeneity.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Application of Optimal Control to CPMG Refocusing Pulse Design does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Application of Optimal Control to CPMG Refocusing Pulse Design, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Application of Optimal Control to CPMG Refocusing Pulse Design will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-123763

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.