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Profile image of Alan C Seifert

    Alan C Seifert, PhD

    Education

    BS, Johns Hopkins University

    PhD, University of Pennsylvania

    Postdoc, Icahn School of Medicine at Mount Sinai

    Awards

    2019

    Junior Fellow of the International Society for Magnetic Resonance in Medicine

    2017

    NINDS Career Development Award (NIH K01)

    2016

    The Lodwick Award, Massachusetts General Hospital, Department of Radiology, 2016 Division of Musculoskeletal Imaging & Intervention

    2015

    ISMRM Musculoskeletal Study Group First Place Oral Presentation

    Research

    Myelin is a biomaterial composed of lipids, proteins, and water, that electrically insulates axons and ensures efficient action potential transduction. The concentration of myelin is closely related to the health of the nervous system, and deficient myelination and demyelination are hallmarks of several neurological disorders, such as multiple sclerosis, traumatic brain injury, and dementia. Non-invasive quantification of myelin content has important applications to the study, diagnosis, and monitoring of treatment of these debilitating disorders. Although myelin liquid crystalline 1H signal is not visible using conventional MRI pulse sequences due to its short transverse relaxation time (T2), quantitative magnetization transfer (qMT) and myelin water imaging (MWI) can infer myelin concentration via the interaction between water and myelin’s liquid crystalline lipid and protein components and have entered widespread use in human studies. Interaction with myelin, however, is not the only phenomenon affecting water 1H signal. This signal is affected by a host of biophysical phenomena, not all of which are fully understood or likely even discovered. Solid-state MRI methods, such as UTE and ZTE, can directly image the extremely short-T2 liquid crystalline 1H signal of myelin, and can provide a direct measurement of myelin concentration, unbiased by the vast range of effects modulating water 1H signal.

    Publications

    Selected Publications