2024-03-28T09:04:44Z
https://tsukuba.repo.nii.ac.jp/oai
oai:tsukuba.repo.nii.ac.jp:00039145
2022-04-27T09:09:13Z
117:1211
117:142
3:62:5592:5405
Acceleration of skeletal age MR examination using compressed sensing
寺田, 康彦
巨瀬 , 勝美
Terada, Yasuhiko
Tamada, Daiki
Kose, Katsumi
Nozaki, Taiki
Kaneko, Yasuhito
Miyagi, Ryo
Yoshioka, Hiroshi
Purpose
To examine the feasibility of accelerating magnetic resonance (MR) image acquisition for children using compressed sensing (CS). Skeletal age assessment using MRI sometimes suffers from motion artifacts because of the long scan time in children. Reducing image acquisition time may provide benefits by reducing motion artifacts, increasing efficiency of examination, and creating a stress-free environment.
Materials and Methods
Undersampling patterns for CS were optimized and CS-based examination with the acceleration factors of 3 (CS3, 55 seconds per scan) and 4 (CS4, 41 seconds per scan) was performed for 59 subjects (35 boys and 24 girls; mean age, 9.1 years; age range, 4.4–15.3 years) using a 0.3T scanner. The skeletal age was assessed by two raters (A and B).
Results
The interrater and intrarater reproducibility in skeletal age assessment was high (Pearson's r = 0.966 [CS3(A1) vs. CS3(A2)], 0.962 [CS4(A1) vs. CS4(A2)], 0.935 [CS3(A1) vs. CS3(B)], and 0.964 [CS4(A1) vs. CS4(B)]; P < 0.001). The errors in skeletal age assessed on the basis of CS-reconstructed images were similar to those assessed on the basis of fully Nyquist-sampled images.
Conclusion
These results demonstrate the validity and reliability of skeletal age examination accelerated by CS-MRI. We conclude that the acceleration factor of 3 was optimal. J. Magn. Reson. Imaging 2016;44:204–211.
journal article
Wiley
2016-07
application/pdf
Journal of magnetic resonance imaging
1
44
204
211
1053-1807
AA10837858
https://tsukuba.repo.nii.ac.jp/record/39145/files/JMRI_44-1.pdf
eng
26713540
10.1002/jmri.25140
© 2015wiley periodicals, Inc
"This is the peer reviewed version of the following article:Journal of magnetic resonance imaging, 44:204-211,which has been published in final form at 10.1002/jmri.25140. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving."