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Abstract #2931

Magnetic Resonance Elastography of the Anterior Mediastinal Mass at 3T: a Preliminary Study

Wei Tang1, Yao Huang1, Ning Wu1, Wenwen Lu1, Linlin Qi1, and Bing Wu2

1Diagnostic Radiology, Cancer Hospital, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China, People's Republic of, 2GE heathcare MR research China, Beijing, China, People's Republic of

Magnetic resonance (MR) elastography depitcs the elastic properties of tissues of interest has been primarily applied in the work-up of diagnosis for hepatic fibrosis. Theoretically, interference fringes could be visualized on the elastogram due to the miscalculation of the interaction between the attenuated propagations of shear wave and the tissue overlying or surrounding to the investigated subject, which might be one of the main concern that limited the clinical potentials of MRE. We propose an investigation on the feasibility of MR elastography in characterizing the mechanical properties of anterior mediastinal masses with the consideration of the relatively superficial location of these entities, therefore few interactions between the shear wave and subject unexpected were produced during the process of elasticity mapping. It was demonstrated in our study that anterior mediastinal mass in various etiology of thymic carcinoma, thymoma, and lymphoma has distinct elastic properties. MR elastography was helpful in distinguishing the thymic carcinoma from lymphoma.

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