Abstract #1462
Characterizing the Inherent and Noise-Induced Errors in Actual Flip Angle Imaging
M Louis Lauzon 1,2 and Richard Frayne 1,2
1
Radiology, Hotchkiss Brain Institute,
University of Calgary, Calgary, AB, Canada,
2
Seaman
Family MR Research Centre, Calgary, AB, Canada
The flip angle term in an image can be determined using
the TR-interleaved AFI (actual flip angle imaging)
sequence. AFI makes an approximation, which leads to an
inherent bias (a measure of accuracy). Noise
propagation, however, produces an uncertainty bias and
an increase in the variance (a measure of precision).
Here, we analytically and numerically determine the
accuracy/precision of the inherent and noise-induced
errors of the cosine of the flip angle as a function of
various acquisition parameters, and provide an overall
error.
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