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Abstract #1101

Fat-suppressed Ultrashort Echo Time Quantitative Magnetization Transfer (UTE-qMT) MRI via Single-point Dixon Method

Soo Hyun Shin1, Hyungseok Jang1, Arya Suprana1,2, Eric Y. Chang1,3, Yajun Ma1, and Jiang Du1,2,3
1Department of Radiology, University of California, San Diego, La Jolla, CA, United States, 2Department of Bioengineering, University of California, San Diego, La Jolla, CA, United States, 3Radiology Service, VA San Diego Healthcare System, La Jolla, CA, United States

Synopsis

Keywords: Fat & Fat/Water Separation, Fat

Motivation: UTE-qMT imaging has shown potential in probing the molecular composition and microenvironment of short-T2 tissues. Yet fat signals and chemical shift artifacts interfere with morphological contrast and UTE-qMT measurements.

Goal(s): To establish a fat suppression method for accurate UTE-qMT imaging.

Approach: We adopted the UTE-single point Dixon (UTE-spDixon) method for suppressing fat signals in a series of MT-weighted UTE images of short-T2 tissues.

Results: UTE-spDixon successfully separates fat from water without short-T2 signal attenuation and compromising qMT measurement.

Impact: The fat/water-separated UTE-qMT method shown in this study will improve the accuracy of quantifying molecular compositions of short-T2 tissues. This fat/water separation method also has the potential to apply to other UTE-based quantitative MR techniques.

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Keywords