Quantification of the in vivo brain ultrashort-T 2 component in healthy volunteers

Recent work has shown MRI is able to measure and quantify signals of phospholipid membrane-bound protons associated with myelin in the human brain. This work seeks to develop an improved technique for characterizing this brain ultrashort- component in vivo accounting for weighting. Data from ultrash...

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Published in:Magnetic resonance in medicine 2024-06, Vol.91 (6), p.2417-2430
Main Authors: Deveshwar, Nikhil, Yao, Jingwen, Han, Misung, Dwork, Nicholas, Shen, Xin, Ljungberg, Emil, Caverzasi, Eduardo, Cao, Peng, Henry, Roland, Green, Ari, Larson, Peder E Z
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cited_by cdi_FETCH-LOGICAL-c978-282ee5f5bb0ee6b53df20fee0f7ea1fd8d463e87e4c557c77d1e5345b01d325d3
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container_end_page 2430
container_issue 6
container_start_page 2417
container_title Magnetic resonance in medicine
container_volume 91
creator Deveshwar, Nikhil
Yao, Jingwen
Han, Misung
Dwork, Nicholas
Shen, Xin
Ljungberg, Emil
Caverzasi, Eduardo
Cao, Peng
Henry, Roland
Green, Ari
Larson, Peder E Z
description Recent work has shown MRI is able to measure and quantify signals of phospholipid membrane-bound protons associated with myelin in the human brain. This work seeks to develop an improved technique for characterizing this brain ultrashort- component in vivo accounting for weighting. Data from ultrashort echo time scans from 16 healthy volunteers with variable flip angles (VFA) were collected and fitted into an advanced regression model to quantify signal fraction, relaxation time, and frequency shift of the ultrashort- component. The fitted components show intra-subject differences of different white matter structures and significantly elevated ultrashort- signal fraction in the corticospinal tracts measured at 0.09 versus 0.06 in other white matter structures and significantly elevated ultrashort- frequency shift in the body of the corpus callosum at 1.5 versus 2.0 ppm in other white matter structures. The significantly different measured components and measured relaxation time of the ultrashort- component suggest that this method is picking up novel signals from phospholipid membrane-bound protons.
doi_str_mv 10.1002/mrm.30013
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title Quantification of the in vivo brain ultrashort-T 2 component in healthy volunteers
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