Bieri, Oliver. (2011) An analytical description of balanced steadystate free precession with finite radiofrequency excitation. Magnetic resonance in medicine, Vol. 65, H. 2. pp. 422431.
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Official URL: http://edoc.unibas.ch/dok/A6004165
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Abstract
Conceptually, the only flaw in the standard steadystate free precession theory is the assumption of quasiinstantaneous radiofrequency pulses, and 1020% signal deviations from theory are observed for common balanced steadystate free precession protocols. This discrepancy in the steadystate signal can be resolved by a simple T(2) substitution taking into account reduced transverse relaxation effects during finite radiofrequency excitation. However, finite radiofrequency effects may also affect the transient phase of balanced steadystate free precession, its contrast or its spinecho nature and thereby have an adverse effect on common steadystate free precession magnetization preparation methods. As a result, an indepth understanding of finite radiofrequency effects is not only of fundamental theoretical interest but also has direct practical implications. In this article, an analytical solution for balanced steadystate free precession with finite radiofrequency pulses is derived for the transient phase (under ideal conditions) and in the steady state demonstrating that balanced steadystate free precession key features are preserved but revealing an unexpected dependency of finite radiofrequency effects on relaxation times for the transient decay. Finally, the mathematical framework reveals that finite radiofrequency theory can be understood as a generalization of alternating repetition time and fluctuating equilibrium steadystate free precession sequence schemes.
Faculties and Departments:  03 Faculty of Medicine > Bereich QuerschnittsfĂ¤cher (Klinik) > Radiologie USB > Nuklearmedizin (Wild) 03 Faculty of Medicine > Departement Klinische Forschung > Bereich QuerschnittsfĂ¤cher (Klinik) > Radiologie USB > Nuklearmedizin (Wild) 

UniBasel Contributors:  Bieri, Oliver 
Item Type:  Article, refereed 
Article Subtype:  Research Article 
Publisher:  WileyLiss 
ISSN:  07403194 
Note:  Publication type according to Uni Basel Research Database: Journal article 
Identification Number: 

Last Modified:  16 Aug 2013 07:34 
Deposited On:  16 Aug 2013 07:33 
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