Black blood TPM imaging at 3 T: comparison of two SAR reducing black blood methods
© Lutz et al; licensee BioMed Central Ltd. 2010
Published: 21 January 2010
For tissue phase mapping (TPM) the suppression of the blood pool is necessary to reduce flow related artifacts. Black blood contrast in CINE imaging can be obtained using spatial presaturation. At high field MR systems, however, spatial presaturation considerably increases the specific absorption rate (SAR). Due to SAR limitations the number of measured heart phases is limited, since idle times have to be introduced into the sequence.
The aim of this study is to evaluate two different approaches for SAR reduced black-blood CINE imaging.
For black-blood suppression at high field strength combined with TPM the alternated application of presaturation pulses is preferred because a better contrast between myocardium and blood could be obtained. With both techniques a better temporal resolution could be obtained without motion information loss.
This article is published under license to BioMed Central Ltd.