Abstract #1949
Quantitation error in 1 H MRS caused by B 1 inhomogeneity and chemical shift displacement at high B 0 field
Hidehiro Watanabe 1 , Nobuhiro Takaya 1 , and Fumiyuki Mitsumori 1
1
Center for Environmental Measurement and
Analysis, National Institute for Environmental Studies,
Tsukuba, Ibaraki, Japan
High signal to noise ratio and good peak resolution are
significant features in
1
H
MRS at high B
0
field.
However, large chemical displacement and B
1
inhomogeneity
may weight a peak on a localized spectrum by different
reception sensitivity due to chemical shift. For
example, magnitudes of peaks of NAA and Cr are weighed
by the different values and this may lead to
quantitation error. In this work, we will demonstrate
this error in phantom experiments at 4.7 T. We will also
demonstrate correction method using the profile of
reception sensitivity measured by water signals.
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