Related Experiment Video
Updated: Apr 28, 2026
Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
Published on: December 18, 2016
[Shortening the Scan Time of Three-dimensional T2-weighted Fat-suppressed Imaging Using DIXON and Compressed Sensing
Tatsuya Yamasaki1, Takuya Kobata1, Yuji Miyatake1
1Division of Clinical Radiology, Department of Medical Technology, University of Kagawa Hospital.
Purpose:
The purpose of this study was to shorten scan time for three-dimensional fat-suppressed T2-weighted imaging (3D FS-T2WI) using DIXON and compressed sensing (HyperSense: HS), while maintaining adequate visualization of the brachial plexus.
Methods:
3D FS-T2WI of a phantom and the neck of healthy volunteers were acquired while varying the echo time (TE), echo train length (ETL) and HS factor (HSf). Image quality was evaluated based on the visual assessment of the brachial plexus in volunteers and the contrast ratios between nerve-mimicking, muscle-mimicking, blood-mimicking, and fat-mimicking materials in the phantom.
Results:
The highest nerve-to-muscle and nerve-to-blood contrast ratios, as well as the best visual evaluation scores, were observed with longer TE values. As ETL increased, both tissue contrast ratios and visual evaluation scores decreased; however, scan time became shorter. Increasing the HSf did not significantly affect contrast ratios or visual evaluation scores, but it also contributed to a shorter scan time.
Conclusion:
Using the parameters TE=110 ms, ETL=120, and HSf=2.5, it was possible to shorten scan time while maintaining visualization of the brachial plexus.
