MediSono P25 EXP, User Manual

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7 Elastography Imaging
Basic User Manual 113
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Ensure the compression is applied perpendicularly, and all parts of the target lesion
are compressed uniformly.
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Ensure the compression is a dynamic intermittent force, i.e. alternate tension with
relaxation, which could keep the distorted tissue back to normal status. If the
distorted tissue is not relaxed, the tissue cannot be distorted and the elastography
imaging cannot be performed.
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The compressing frequency is recommended to be 1.5-3 times per second. Lift
the probe up after each pressure, and ensure the probe is not away from the target
lesion.
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The absolute value of positive and negative maximums on strain curves should be
0.5-1. If the absolute value is below 0.5 or over 1, the compression is too hard or
too low for correct elastography results.
5. Adjust the elastography ROI.
To acquire accurate tissue stiffness information, you are recommended to adjust the
elastography ROI to two times of the target lesion
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Move the trackball to position elastography ROI.
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Press the confirm key on the control panel to adjust the size of elastography ROI.
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Press the confirm key to reposition elastography ROI.
6. Optimize the elastography image. For details, refer to Section 7.2 Optimizing
Elastography Images.
7. Tap Elasto again to exit the screen.
7
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2 Optimizing Elastography Images
The touch screen displays all controls related to the elastography imaging (as shown in the
figure), you can use them to optimize elastography images.