User's Manual

Acclarix LX9 Series Diagnostic Ultrasound System User Manual Measurements and Reports
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8.2.4.1. Simpson’s Method of Disks (MOD)
Simpson‟s MOD is a method used to calculate LV diastolic and systolic volumes and ejection fraction.
Simpson‟s MOD is available in the Cardiac presets.
To use the Simpson‟s MOD measurement:
1. Invoke the B-mode application measurement function.
2. Select LV Simpson measurement on the touch screen and then select one measurement label
from A4C Dias., A4C Sys., A2C Dias., and A2C Sys.. A single caliper will be displayed on the
image field.
3. Move the caliper and press <Set> key to position the start point A at one end of left ventricular
long axis.
4. Draw the trace along the endocardium of the left ventricular.
5. Press <Set> key to fix the end point B and complete the trace. A new caliper positions
automatically at the apex (Point D) of the trace, connecting the Point C (Midpoint of point A and B).
This distance between point C and D is the longest detected by the system, as shown below:
6. Pivot the Point D to a new desired position if necessary.
7. Press <Set> key to complete the measurement.
8.2.4.2. PISA
PISA (Proximal Isovelocity Surface Area) is a tool in Cardiac presets used for quantitative analysis of
regurgitation. It is only available in Color and Doppler mode.
To use PISA measurement in Color mode:
1. Adjust the color image until the aliasing appears. Invoke the application measurement function.
2. Select PISA measurement on the touch screen and then select a measurement label from MR
Rad, MR Als. Vel, AR Rad, AR Als. Vel, TR Rad, TR Als.Vel, PR Rad and PR Vls. Vel. A single
caliper will be displayed on the image field.
3. Move the caliper and press <Set> key to position the caliper as the center of the semicircular.
4. Move the trackball to adjust the radius length and orientation of the semicircular.
5. Press <Set>key to fix the semicircular and then a dialog box of “Color Aliasing Velocity” pops up.
6. Select “Top aliasing velocity”, “Bottom aliasing velocity”, or manually enter the aliasing velocity
from 0 cm/s to 500 cm/s.
7. Click OK and then measurement results are shown.
To use PISA measurement in Doppler mode:
1. Freeze a strip image. Invoke the application measurement function.
2. Select PISA measurement on the touch screen and then select a measurement label from MR
Trace, AR Trace, TR Trace and PR Trace.
3. Use the Doppler trace tool to get the measurement results.