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Article: Effect of diffusion on the steady-state magnetization with pulsed field gradients

TitleEffect of diffusion on the steady-state magnetization with pulsed field gradients
Authors
Issue Date1990
Citation
Journal Of Magnetic Resonance (1969), 1990, v. 90 n. 2, p. 243-253 How to Cite?
AbstractSteady-state free precession with pulsed field gradients in the presence of spin diffusion is investigated. The exact effect of diffusion on SSFP magnetization and its dependence on the pulsed field gradient amplitudes and timing, the relaxation and repetition times, and the flip angle are established theoretically. A relatively simple form is given for the average transverse magnetization when we assume that the precession angles within each voxel range from 0 to 2π uniformly, which is likely to be true in most imaging situations. Some illustrative numerical results are presented to show the different effects of diffusion in two common types of steady-state fast imaging pulse sequences: those which use the coherent transverse magnetization after the RF pulse as the signal for imaging and those which use the coherent magnetization just before the RF pulse for imaging. The magnitude of the effects calculated with this theoretical expression is compared with two approximate solutions proposed by other investigators. © 1990.
Persistent Identifierhttp://hdl.handle.net/10722/154760
ISSN

 

DC FieldValueLanguage
dc.contributor.authorWu, EXen_US
dc.contributor.authorBuxton, RBen_US
dc.date.accessioned2012-08-08T08:30:30Z-
dc.date.available2012-08-08T08:30:30Z-
dc.date.issued1990en_US
dc.identifier.citationJournal Of Magnetic Resonance (1969), 1990, v. 90 n. 2, p. 243-253en_US
dc.identifier.issn0022-2364en_US
dc.identifier.urihttp://hdl.handle.net/10722/154760-
dc.description.abstractSteady-state free precession with pulsed field gradients in the presence of spin diffusion is investigated. The exact effect of diffusion on SSFP magnetization and its dependence on the pulsed field gradient amplitudes and timing, the relaxation and repetition times, and the flip angle are established theoretically. A relatively simple form is given for the average transverse magnetization when we assume that the precession angles within each voxel range from 0 to 2π uniformly, which is likely to be true in most imaging situations. Some illustrative numerical results are presented to show the different effects of diffusion in two common types of steady-state fast imaging pulse sequences: those which use the coherent transverse magnetization after the RF pulse as the signal for imaging and those which use the coherent magnetization just before the RF pulse for imaging. The magnitude of the effects calculated with this theoretical expression is compared with two approximate solutions proposed by other investigators. © 1990.en_US
dc.languageengen_US
dc.relation.ispartofJournal of Magnetic Resonance (1969)en_US
dc.titleEffect of diffusion on the steady-state magnetization with pulsed field gradientsen_US
dc.typeArticleen_US
dc.identifier.emailWu, EX:ewu1@hkucc.hku.hken_US
dc.identifier.authorityWu, EX=rp00193en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0000093181en_US
dc.identifier.volume90en_US
dc.identifier.issue2en_US
dc.identifier.spage243en_US
dc.identifier.epage253en_US
dc.identifier.scopusauthoridWu, EX=7202128034en_US
dc.identifier.scopusauthoridBuxton, RB=7102032452en_US

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