Journal
JOURNAL OF MAGNETIC RESONANCE
Volume 207, Issue 1, Pages 114-123Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jmr.2010.08.013
Keywords
Optimal control theory; GRAPE algorithm; Phase cycles; Composite pulses; Shaped pulses; Difference spectroscopy
Funding
- Fonds der chemischen Industrie
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We introduce the concept of cooperative (COOP) pulses which are designed to compensate each other's imperfections. In multi-scan experiments, COOP pulses can cancel undesired signal contributions, complementing and generalizing phase cycles. COOP pulses can be efficiently optimized using an extended version of the optimal-control-based gradient ascent pulse engineering (GRAPE) algorithm. The advantage of the COOP approach is experimentally demonstrated for broadband and band-selective pulses. (C) 2010 Elsevier Inc. All rights reserved.
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