Measurement and Analysis
316 Vivid S5/Vivid S6 User Manual
R2424458-100 Rev. 2
8. To place the caliper along the acetabular roof line, move the
Trackball.
9. To rotate or change inclination, adjust the Ellipse control or
Hip Rotate.
10. To fix the third measurement line and complete
measurement, press
SET.
The system displays the hip measurements (α and ß) in
the Results window.
Alpha HIP
The Alpha HIP measurement measures the angle between the
iliac baseline and the bony roof line. To make an Alpha HIP
measurement:
1. From the Top/Sub Menu, select either the right or left side
(orientation) and then select Alpha HIP.
A horizontal dotted line displays.
2. To place the baseline, move the Trackball. Position the
crosshairs edge at the osseous convexity of the ilium.
3. To rotate or change inclination, adjust the Ellipse control or
Hip Rotate.
4. To fix the baseline, press
SET.
The system displays a second dotted line at an angle.
5. To place the caliper along the acetabular roof line, move the
Trackball.
6. To rotate or change inclination, adjust the Ellipse control or
Hip Rotate.
7. To fix the second measurement line, press
SET.
The system displays the alpha hip measurement (α) in the
Results window.
d:D Ratio Measurement
The d:D Ratio measurement measures the percentage of the
femoral head coverage under the bony roof. To make this
measurement:
1. From the Top/Sub Menu, select either the right or left side
(orientation) and then select d:D Ratio.
A horizontal dotted line displays.
2. Use the Trackball to place the baseline along the ilium.
Position the crosshairs edge at the osseous convexity of
the ilium.
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