Quantitative myocardial inflammation assessed using a novel USPIO-Magnetic Resonance Imaging acquisition and analysis protocol by Semple Scott, Alam Shirjel R, MacGillivray Tom J, Dweck Marc R, Shah Anoop S, Richards Jenny, Wang Chengjia, Lang Ninian, McKillop Graham, Mirsadraee Saeed, Pessotto Renzo, Zamvar Vipin, Henriksen Peter, Newby David