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Abstract #1937

Quantitative relaxation time mapping of axillary lymph nodes and recommended parameters for 3T lymphatic node substructure imaging

Rachelle Crescenzi1, Paula M.C. Donahue2,3, Vaughn G Braxton1, Allison O Scott1, and Manus J Donahue1,4,5,6

1Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, United States, 2Physical Medicine and Rehabilitation, Vanderbilt University Medical Center, Nashville, TN, United States, 3Vanderbilt Dayani Center for Health and Wellness, Nashville, TN, United States, 4Neurology, Vanderbilt University Medical Center, Nashville, TN, United States, 5Psychiatry, Vanderbilt University Medical Center, Nashville, TN, United States, 6Physics and Astronomy, Vanderbilt University, Nashville, TN, United States

A lack of MRI methods exist that are designed with sensitivity to the lymphatics, even though components of the lymphatic system have been discovered in every major organ system of the body and likely play an understudied role in disease. In this work we performed quantitative relaxation time mapping in axillary lymph node substructures, the cortex and hilum, for the first time at 3 Tesla and used these values to optimize structural imaging parameters for the lymphatics. Knowledge of fundamental MR parameters in the lymphatics is the first step to developing novel imaging sequences that exploit lymphatic tissue in vivo.

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