Abstract #4255
Dynamic analysis of T 2 and proton density of exercise-induced muscle using SE-EPI
Noriyuki Tawara 1 , Takahiro Ohnishi 2 , and Toru Yamamoto 1
1
Faculty of Health Sciences, Hokkaido
University, Hokkaido, Japan,
2
Siemens
Japan, Japan
Understanding of exercised muscle activity has been the
essences in sports medicine and rehabilitation medicine.
Although MRI is a useful technique to obtain
quantitative values of T
2
and
proton density, most of the previous MRI studies
discussed changes of MR signal. Changes of T
2
in
the exercised muscle are speculated based on the results
of the NIRS, and various physiologic mechanisms are
proposed. However, physiologic understanding of
exercised muscle activity is still controversial. In
this study, we first tried to obtain dynamic changes of
T
2
and
proton density quantitatively after the muscle exercise.
In conclusion, using SE-EPI, temporal resolution of
dynamic study of exercise-induced muscle can be
shortened to 30 s and dynamic changes of R
2
and
M
0
were
quantitatively obtained for the new understanding of
exercised muscle activity.
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