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Abstract #4009

Multi-parametric Classification of Inflammatory Myopathies at 3.0 T

Ke Li 1,2 , Richard D. Dortch 1,2 , E. Brian Welch 1,2 , Susan F. Kroop 3 , Joseph W. Huston 3 , Amanda K.W. Buck 1,2 , Theodore F. Towse 2,4 , Nathan D. Bryant 1,2 , Bruce M. Damon 1,2 , and Jane H. Park 5

1 Institute of Imaging Science, Vanderbilt University, Nashville, TN, United States, 2 Department of Radiology, Vanderbilt University, Nashville, TN, United States, 3 Rheumatology Division, School of Medicine, Vanderbilt University, Nashville, TN, United States, 4 Physical Medicine and Rehabilitation, Vanderbilt University, Nashville, TN, United States, 5 Molecular Physiology and Biophysics, Vanderbilt University, Nashville, TN, United States

The idiopathic inflammatory myopathies (IIM), including polymyositis, dermatomyositis, and inclusion body myositis, are a set of chronic disorders with pathological features of muscle inflammation, fibrosis, fat infiltration/replacement, and atrophy. IIM patients experience weakness, pain, fatigue, and difficulties in daily activities. However, clear no correlations have been established between the variations in clinical presentation of these diseases, degree of muscle enzyme elevation, and degree of weakness are not always present. In this work, a multi-parametric MRI protocol was developed to investigate the pathological processes at a microscopic level and to characterize the severity of muscle pathologies more objectively and quantitatively.

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