PURPOSE: To investigate equilibrium contrast material-enhanced magnetic resonance (MR) imaging measurement of extracellular volume (ECV) fraction within healthy abdominal tissues and to test the hypotheses that tissue ECV in systemic amyloid light-chain (AL) amyloidosis is greater than in healthy patients and show that this increase correlates with organ amyloid burden. MATERIALS AND METHODS: A local ethics committee approved the study and all patients gave written informed consent. Forty healthy volunteers (18 men, 22 women; median age, 43 years; age range, 24-88 years) and 67 patients with AL amyloidosis (43 men, 24 women; median age, 65 years; age range, 38-81 years) underwent equilibrium MR imaging of the upper abdomen. ECV was measured in the liver, spleen, and paravertebral muscle. Patients with amyloidosis also underwent serum amyloid P (SAP) component scintigraphy so that specific organ involvement by amyloid could be scored. Variation in ECV between tissues was assessed by using a Friedman Test. Tissue ECV in healthy and amyloidosis groups were compared by using a Mann-Whitney U test. Spearman correlation was used to test for an association between the organ SAP score and ECV. RESULTS: ECV measured at equilibrium MR imaging varied significantly between organs in healthy volunteers (χ(2) = 31.0; P < .001). ECV was highest in the spleen (0.34), followed by liver (0.29) and muscle (0.09). ECVs measured within the spleen (0.39; P< .001), liver (0.31; P = .005), and muscle (0.16; P< .001) were significantly higher in patients with amyloidosis than in healthy control subjects. ECV measured in the liver and spleen showed increasing organ amyloid burden assessed at SAP scintigraphy (liver, rs = 0.54; spleen, rs = 0.57). CONCLUSION: Equilibrium MR imaging can be used to define ECV within healthy tissues. ECV is increased in amyloidosis compared with healthy tissues, and this increase correlates with rising tissue amyloid burden.
PURPOSE: To investigate equilibrium contrast material-enhanced magnetic resonance (MR) imaging measurement of extracellular volume (ECV) fraction within healthy abdominal tissues and to test the hypotheses that tissue ECV in systemic amyloid light-chain (AL) amyloidosis is greater than in healthy patients and show that this increase correlates with organ amyloid burden. MATERIALS AND METHODS: A local ethics committee approved the study and all patients gave written informed consent. Forty healthy volunteers (18 men, 22 women; median age, 43 years; age range, 24-88 years) and 67 patients with AL amyloidosis (43 men, 24 women; median age, 65 years; age range, 38-81 years) underwent equilibrium MR imaging of the upper abdomen. ECV was measured in the liver, spleen, and paravertebral muscle. Patients with amyloidosis also underwent serum amyloid P (SAP) component scintigraphy so that specific organ involvement by amyloid could be scored. Variation in ECV between tissues was assessed by using a Friedman Test. Tissue ECV in healthy and amyloidosis groups were compared by using a Mann-Whitney U test. Spearman correlation was used to test for an association between the organ SAP score and ECV. RESULTS: ECV measured at equilibrium MR imaging varied significantly between organs in healthy volunteers (χ(2) = 31.0; P < .001). ECV was highest in the spleen (0.34), followed by liver (0.29) and muscle (0.09). ECVs measured within the spleen (0.39; P< .001), liver (0.31; P = .005), and muscle (0.16; P< .001) were significantly higher in patients with amyloidosis than in healthy control subjects. ECV measured in the liver and spleen showed increasing organ amyloid burden assessed at SAP scintigraphy (liver, rs = 0.54; spleen, rs = 0.57). CONCLUSION: Equilibrium MR imaging can be used to define ECV within healthy tissues. ECV is increased in amyloidosis compared with healthy tissues, and this increase correlates with rising tissue amyloid burden.
Authors: Maxime Ronot; Tarik Asselah; Valérie Paradis; Nicolas Michoux; Mylène Dorvillius; Gabriel Baron; Patrick Marcellin; Bernard E Van Beers; Valérie Vilgrain Journal: Radiology Date: 2010-07 Impact factor: 11.105
Authors: Andrew S Flett; Martin P Hayward; Michael T Ashworth; Michael S Hansen; Andrew M Taylor; Perry M Elliott; Christopher McGregor; James C Moon Journal: Circulation Date: 2010-06-28 Impact factor: 29.690
Authors: Matthew R Orton; Keiko Miyazaki; Dow-Mu Koh; David J Collins; David J Hawkes; David Atkinson; Martin O Leach Journal: Phys Med Biol Date: 2009-03-17 Impact factor: 3.609
Authors: Laurent Huwart; Christine Sempoux; Najat Salameh; Jacques Jamart; Laurence Annet; Ralph Sinkus; Frank Peeters; Leon C ter Beek; Yves Horsmans; Bernard E Van Beers Journal: Radiology Date: 2007-11 Impact factor: 11.105
Authors: Michael L Wells; Michael R Moynagh; Rickey E Carter; Robert A Childs; Cameron E Leitch; Joel G Fletcher; Benjamin M Yeh; Sudhakar K Venkatesh Journal: Abdom Radiol (NY) Date: 2017-01
Authors: Sanjay M Banypersad; Marianna Fontana; Viviana Maestrini; Daniel M Sado; Gabriella Captur; Aviva Petrie; Stefan K Piechnik; Carol J Whelan; Anna S Herrey; Julian D Gillmore; Helen J Lachmann; Ashutosh D Wechalekar; Philip N Hawkins; James C Moon Journal: Eur Heart J Date: 2014-11-16 Impact factor: 29.983