Abstract
Background The recently published method SMART1Map[1] has proposed a new true T1 measurement technique. It consists in a 2D saturation-recovery prepared balancedSSFP sequence which allows different acquisition schemes depending on the number of repetition (shot) used. Single-shot acquisition duration is short but cardiac motion blur can occur due to long acquisition window duration. Two-shot acquisition time allows an acquisition window twice smaller but inter acquisition window motion can occur. Note that single-shot scheme allows to acquire an additional point when magnetization has not yet undergo any saturation pulse, thus corresponding to an infinite saturation delay time (T∞). In this study, we compared both schemes on healthy volunteers to determine the most appropriate strategy for a large range of T1 values measurement at 3T.
Highlights
The recently published method SMART1Map[1] has proposed a new true T1 measurement technique. It consists in a 2D saturation-recovery prepared balancedSSFP sequence which allows different acquisition schemes depending on the number of repetition used
Myocardium is better defined on the two-shot plus T∞ data-set compared to others (Figure 1)
Due to its long acquisition window, single-shot might lead to blurring limiting for focal T1 assessment
Summary
Myocardium T1 measurement using single and multi-shot SMART1Map acquisition: pros and cons. Pauline Ferry1,2*, Anne Menini, Glenn S Slavin, Jeff A Stainsby, Damien Mandry, Laurent Bonnemains, Jacques Felblinger, Marine Beaumont. From 17th Annual SCMR Scientific Sessions New Orleans, LA, USA. From 17th Annual SCMR Scientific Sessions New Orleans, LA, USA. 16-19 January 2014
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