Performing an Exam
T3300 Diagnostic Ultrasound System | 70 | B00601-010 4/10/17
6.10.1.6 IMT
Measure IMT (Intima-Media Thickness) of the carotid artery, which is useful for detecting early signs
of arteriosclerosis.
1. Touch IMT. A crosshair cursor appears on the image. Drag the target cursor to the desired
location and release it to set the start point of measurement.
2. Drag the target cursor to the other end of the desired area, and release it to set the end point of
measurement. The automatic tracing of the IMT will be enclosed and measured within the
rectangle area marked by the four corners .
6.10.1.7 Calculation Package
Perform a set of predefined measurements based on the scan mode/calculation method you select.
1. Touch Calc to open the Calculation Package menu.
2. Touch a desired calculation method. The items to measure display in a list of order under the
selected method.
3. Touch the first item and the screen displays the corresponding cursor. Drag it to perform
measurement.
4. After you have finished with the measurement, touch the second item. The first item is checked
automatically with the measured result displayed beside it.
5. Repeat step 3-4 to perform the rest of the measurements on the list, then touch Close.
NOTES
For measurement accuracy and precision in 2D measurement:
• Linear distance measurement errors will be less than ±5%.
• Perimeter, and ellipse circumference measurement errors will be less than ±5%.
• Area measurement errors are related to the linear distance measurement and will be less than
±10%.
6.10.2 Measuring in M-Mode
6.10.2.1 Distance
Measure the length between two horizontal lines that lean on two cursors. The position of the vertical
time lines does not affect the distance measurement.
1. Touch Distance. A crosshair cursor with horizontal and vertical axes appears on the time series
window. Drag the cursor to a desired start point on the vertical axis and release it.
2. A second cursor appears. Drag it to the end point on the vertical axis then release it to complete
measurement.
6.10.2.2 Slope
Measure the length between the intersections of two cursors. Slope can be positive or negative and
measures the rate of change between the two points defined by the intersections of the cursors in
cm/sec.
1. Touch Slope. A crosshair cursor with horizontal and vertical axes appears on the time series
window. Drag the cursor to a desired start point and release it.
2. A second cursor appears. Drag it to the end point then release it to complete measurement.
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