Bieri, Oliver. (2011) An analytical description of balanced steady-state free precession with finite radio-frequency excitation. Magnetic resonance in medicine, Vol. 65, H. 2. pp. 422-431.
Full text not available from this repository.
Official URL: http://edoc.unibas.ch/dok/A6004165
Downloads: Statistics Overview
Abstract
Conceptually, the only flaw in the standard steady-state free precession theory is the assumption of quasi-instantaneous radio-frequency pulses, and 10-20% signal deviations from theory are observed for common balanced steady-state free precession protocols. This discrepancy in the steady-state signal can be resolved by a simple T(2) substitution taking into account reduced transverse relaxation effects during finite radio-frequency excitation. However, finite radio-frequency effects may also affect the transient phase of balanced steady-state free precession, its contrast or its spin-echo nature and thereby have an adverse effect on common steady-state free precession magnetization preparation methods. As a result, an in-depth understanding of finite radio-frequency effects is not only of fundamental theoretical interest but also has direct practical implications. In this article, an analytical solution for balanced steady-state free precession with finite radio-frequency pulses is derived for the transient phase (under ideal conditions) and in the steady state demonstrating that balanced steady-state free precession key features are preserved but revealing an unexpected dependency of finite radio-frequency effects on relaxation times for the transient decay. Finally, the mathematical framework reveals that finite radio-frequency theory can be understood as a generalization of alternating repetition time and fluctuating equilibrium steady-state free precession sequence schemes.
Faculties and Departments: | 03 Faculty of Medicine > Bereich Querschnittsfächer (Klinik) > Radiologie USB > Nuklearmedizin (Wild) 03 Faculty of Medicine > Departement Klinische Forschung > Bereich Querschnittsfächer (Klinik) > Radiologie USB > Nuklearmedizin (Wild) |
---|---|
UniBasel Contributors: | Bieri, Oliver |
Item Type: | Article, refereed |
Article Subtype: | Research Article |
Publisher: | Wiley-Liss |
ISSN: | 0740-3194 |
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 |
Repository Staff Only: item control page