Siemens syngo MR E11 Manuel de l'opérateur - Page 30
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6
Examination
30
Phase Difference Image
This image is generated by subtracting the phase values from images
acquired with positive and negative cyclic motion encoding. The image
is scaled so that a phase accumulation of minus pi is mapped to 0 and a
phase accumulation of plus pi is mapped to 4095. The phase difference
images are acquired to depict the displacement field at four different
phases of the applied cyclic motion.
Confidence Map
As a measure of the wave SNR, the wave field is fit with a polynomial
model. The R squared value from this fit is multiplied by 1000 and dis
played in this series. Areas with high R squared values have the high
wave amplitudes relative to the amount of phase noise.
1
Scroll through the Wave result images to have the wave
propagation displayed.
2
If necessary, load the phase difference and confidence images in
the viewer.
3
Use the common tools to evaluate the results according to your
needs.
MR Elastography | Operator Manual
Print No. MR-06020G.640.08.04.02