Incidental Magnetization Transfer Effects in Multislice Brain MRI at 3.0T
- 이상권; 우성구
- Alternative Author(s)
- Lee, Sang Kwon; Woo, Seong Ku
- Publication Year
- brain; magnetization transfer; MRI; contrast mechanism; multi-slice interference
- Purpose: To evaluate the effect of incidental magnetization
transfer (iMT) in multislice brain imaging at 3.0T.
Materials and 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.
Conclusion: 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.
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