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Relaxational signal attenuation during soft refocusing pulses.
Li, Runchao; Castañar, Laura; Nilsson, Mathias; Morris, Gareth A.
Afiliación
  • Li R; Department of Chemistry, University of Manchester, Manchester M13 9PL, UK. Electronic address: runchao.li@postgrad.manchester.ac.uk.
  • Castañar L; Department of Chemistry, University of Manchester, Manchester M13 9PL, UK. Electronic address: laura.castanaracedo@manchester.ac.uk.
  • Nilsson M; Department of Chemistry, University of Manchester, Manchester M13 9PL, UK. Electronic address: mathias.nilsson@manchester.ac.uk.
  • Morris GA; Department of Chemistry, University of Manchester, Manchester M13 9PL, UK. Electronic address: g.a.morris@manchester.ac.uk.
J Magn Reson ; 346: 107337, 2023 Jan.
Article en En | MEDLINE | ID: mdl-36470177
Quantitative NMR is widely used, but the systematic errors introduced when signals are excited by anything other than a single hard pulse are not always well understood. One important source of error in experiments using soft pulses is the spin relaxation that takes place during pulses, which contains contributions from both spin-spin and spin-lattice relaxation. Here it is shown that relaxation on resonance during shaped soft 180° refocusing pulses in practical experiments can be well represented by biexponential decay, with rate constants R2 and a shape-dependent linear combination of R1 and R2, where R1 and R2 are the inverses of the spin-lattice and spin-spin relaxation times T1 and T2. In principle this would allow correction for relaxational losses in experiments using on-resonance selective refocusing pulses.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Magn Reson Asunto de la revista: DIAGNOSTICO POR IMAGEM Año: 2023 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Magn Reson Asunto de la revista: DIAGNOSTICO POR IMAGEM Año: 2023 Tipo del documento: Article Pais de publicación: Estados Unidos