Effect of temperature and heart rate variability on ... - Springer Link
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Effect of temperature and heart rate variability on Phantom T1 maps Vassilis Vassiliou1,2*, Ee Ling Heng1,2, Evangelia Nyktari1, Andreas Greiser3, David Firmin1,2, Dudley J Pennell1,2, Peter Gatehouse1,2, Sanjay K Prasad1,2 From 18th Annual SCMR Scientific Sessions Nice, France. 4-7 February 2015 Background Phantoms are increasingly being used for quality assurance when undertaking T1 mapping for myocardial interstitial fibrosis to ensure long-term stability of methods applied in patients e.g. against scanner alterations, across multi scanners and multi centers. We sought to investigate whether temperature and heart rate (HR) variability could influence Phantom T1/ECV as such a variation will need to be considered in the quality assurance process. Methods NiCl2-agarose gel phantoms [1] prepared in a standardised lab following a reproducible procedure as previously reported [2]. For the HR variability 4 phantoms were used to model native and post-contrast T1 of blood and myocardium; They were imaged with a prototype 11 HB MOLLI 5(3)3 (Siemens prototype WIP448B) at low resolution (HR>90bpm) and high resolution (
