“…ECV measured using EQ imaging has demonstrated promise as a biomarker of extracellular disease, able to quantify extracellular expansion resulting from diffuse fibrosis within the heart 2,11,13 and liver, 14,15 and amyloid protein deposition within various organs. 4,16,17 Although ECV has been validated against specific reference standard measures of disease severity, to date there has been no specific verification of this volume fraction. By using a 3D engineered tissue model we have been able to control the fractional cellular volume within a tissue and demonstrate in 6 collagen gels, that EQ-MRI provides good prediction of extracellular fraction.…”