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Abstract #4519

On the impact of slice profile and thickness definition across vendors in 2D bSSFP on SNR and T1-mapping in cardiac MRI

Jouke Smink1, Guillaume Gilbert2, Marc Kouwenhoven1, and Johan S van den Brink3

1MR Clinical Science, Philips, Best, Netherlands, 2MR Clinical Science, Philips, Montréal, QC, Canada, 3MR Clinical Excellence, Philips, Best, Netherlands

The actual slice thickness and slice profile in 2D imaging are often not taken into account when comparing SNR from different platforms. It can also have an impact in quantitative imaging such as T1-mapping. Inspired by an earlier study, we compared two definitions of slice thickness in 2D bSSFP(the workhorse in CMR): full width at 50% (FW50) and full width at 70% of maximum (FW70). The FW70 pulse definition leads to 30% thicker slices, 9-30% more SNR and it is more vulnerable to partial volume effects. These effects needs to be taken into account when comparing scans from different platforms in multi-center trials.

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