Physics – Quantum Physics
Scientific paper
2010-02-08
J. Magn. Reson. 207, 220-233 (2010)
Physics
Quantum Physics
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.
Borneman Troy W.
Cory David G.
Hurlimann Martin D.
No associations
LandOfFree
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.
Profile ID: LFWR-SCP-O-123763