Incidental magnetization transfer effects in multislice brain MRI at 3.0T.
OBJECTIVE
To evaluate the effect of incidental magnetization transfer (iMT) in multislice brain imaging at 3.0T.


METHODS
The contribution of iMT to multislice brain MRI was evaluated at 3.0T. In 10 normal subjects we obtained multislice fast spin-echo (FSE) MR images using a 16-echo pulse train without an off-resonance MT pulse at 3.0T and 1.5T. We quantified the extent of iMT by calculating the iMT ratio (iMTR).


RESULTS
We found that the iMT contrast (iMTC) has a greater effect at 3.0T. As the number of slices increased in multislice FSE imaging, the difference between two field strengths became larger. Compared to WM structures, however, the difference in iMT effect between 1.5T and 3.0T was smaller in the case of GM structures.


CONCLUSIONS
The iMTC has a greater effect at 3.0T. The strength of the iMT is different for different tissue types and also varies according to the number of slices used.
Chang
Yongmin
Y
Department of Diagnostic Radiology, Kyungpook National University College of Medicine, and Kyungpook National University Hospital, Daegu, Korea. ychang@knu.ac.kr
Bae
Sung Jin
SJ
Lee
Young Ju
YJ
Hwang
Moon Jung
MJ
Lee
Sang Heun
SH
Lee
Jongmin
J
Lee
Sang Kwon
SK
Woo
Seongku
S
D000328:Adult; D001921:Brain / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D012815:Signal Processing, Computer-Assisted