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Left and right ventricular (LV, RV) T<jats:sub>1<\/jats:sub> mapping was performed in the basal, mid and apical short axis using 4-variants of SAPPHIRE: diastolic, systolic, 0th and 2nd order motion-sensitized DB and conventional modified Look-Locker inversion\u00a0recovery (MOLLI).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>LV global myocardial T<jats:sub>1<\/jats:sub> times (1.5\u00a0T then 3\u00a0T results) were significantly longer by diastolic SAPPHIRE (1283\u2009\u00b1\u200911|1600\u2009\u00b1\u200917\u00a0ms) than any of the other SAPPHIRE variants: systolic (1239\u2009\u00b1\u20099|1595\u2009\u00b1\u200913\u00a0ms), 0th order DB (1241\u2009\u00b1\u200910|1596\u2009\u00b1\u200912) and 2nd order DB (1251\u2009\u00b1\u200911|1560\u2009\u00b1\u200920\u00a0ms, all <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05). In the mid septum MOLLI and diastolic SAPPHIRE exhibited significant T<jats:sub>1<\/jats:sub> signal contamination (longer T<jats:sub>1<\/jats:sub>) at the blood-myocardial interface not seen with the other 3 SAPPHIRE variants (all <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.025). Additionally, systolic, 0th order and 2nd order DB SAPPHIRE showed narrower dispersion of myocardial T<jats:sub>1<\/jats:sub> times across the mid septum when compared to diastolic SAPPHIRE (interquartile ranges respectively: 25\u00a0ms, 71\u00a0ms, 73\u00a0ms <jats:italic>vs<\/jats:italic> 143\u00a0ms, all <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.05). RV T<jats:sub>1<\/jats:sub> mapping was achievable using systolic, 0th and 2nd order DB SAPPHIRE but not with MOLLI or diastolic SAPPHIRE. All 4 SAPPHIRE variants showed excellent re-read reproducibility (intraclass correlation coefficients 0.953 to 0.996).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>These small-scale preliminary healthy volunteer data suggest that DB SAPPHIRE has the potential to reduce partial volume effects at the blood-myocardial interface, and that systolic SAPPHIRE could be a feasible solution for right ventricular T<jats:sub>1<\/jats:sub> mapping. Further work is needed to understand the robustness of these sequences and their potential clinical utility.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12880-022-00843-0","type":"journal-article","created":{"date-parts":[[2022,7,7]],"date-time":"2022-07-07T14:08:59Z","timestamp":1657202939000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Saturation-pulse prepared heart-rate independent inversion-recovery (SAPPHIRE) biventricular T1 mapping: inter-field strength, head-to-head comparison of diastolic, systolic and dark-blood measurements"],"prefix":"10.1186","volume":"22","author":[{"given":"Mashael","family":"Alfarih","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jo\u00e3o B.","family":"Augusto","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kristopher D.","family":"Knott","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nasri","family":"Fatih","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. 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