ASL: Comparison of presaturation and RF pulse optimization | David Alberg Holm, Karam Sidaros
| | Abstract | In arterial spin labelling, the difference between the tag and control image is on the order of 1% of the equilibrium magnetization. A small offset between the images not related to perfusion, can therefore lead to large errors in the measured perfusion. One source of error is non-ideal RF pulses resulting in the inversion pulse affecting the acquired signal from the imaging area. This systematic error can be reduced by increasing the gap between the inversion and imaging regions, by using optimized inversion pulses e.g. FOCI1 or by saturating the signal from static tissue in the imaging area prior to acquiring the image. In this simulation study, the use of presaturation is compared with using optimized RF pulses. Furthermore the effect of using and optimizing crusher gradients is reported. | | Type | Conference paper [With referee] | | Conference | Proc. International Society of Magnetic Resonance In Medicine - ISMRM 2005, Miami, Florida, USA | | Year | 2005 Month May pp. 1153 | | Electronic version(s) | [pdf] | | BibTeX data | [bibtex] | | IMM Group(s) | Other |
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