6 Image Acquisition
Operator’s Manual 6 - 37
6.13 RIMT (Real-time Intima-Media Thickness)
RIMT detects the changes of the vascular intima in real time, and monitors and calculates the
thickness of the carotid intima automatically.
• It is merely available to enter RIMT imaging mode in B single window and dual window when
adopting linear probe for carotid exam.
• Do not press the probe after entering RIMT imaging mode when scanning the image in real
time.
• RIMT inside ROI is highlighted in red, yellow and green. There is no gap between the filling
area and the vascular wall. The green color indicates the normal acceptable value. The red
color or yellow color indicates the abnormal unacceptable value.
Perform the following procedure:
1. Select the probe first. Perform B mode in carotid exam mode. Detect the patient’s carotid in B
mode. Keep the acoustic beam vertical with the anterior and the posterior of the vascular and
make the anterior and the posterior of the intima visible at the carotid stenosis to obtain a
premium image.
2. Tap [RIMT] to activate the function. Rotate the knob under [Side] to select left or right carotid.
3. Use the trackball to locate ROI over the target area. The dotted line of the ROI is in the middle
of the blood vessel. Press <Set> to confirm the position and size of the ROI.
4. Tap [Start Calc] to measure RIMT of left carotid and right carotid. 6 RIMT values (each RIMT
value represents maximum IMT value within one cardiac cycle), RIMT average value
(arithmetic mean value of the 6 RIMT values), SD (standard deviation of the 6 RIMT values)
and ROI length are displayed in the result pane.
5. Tap [Accept Result] or press <Set>, the image is frozen. You may save single frame image and
results to the result pane.
Tap [Cancel Result] to recalculate RIMT. Perform step 4 to reset the RIMT.
6. Tap [Report] to view the report. Only last acceptable data, including RIMT on left and right
carotid, is in the data sheet.
You can perform:
– Deleting data: select RIMT data from the data sheet. Tap [Delete Rows] to remove the
RIMT data of the left and the right carotid.
– Viewing graphic: tap [IMT Trend] to view the RIMT graphic. The data on the graphic is
same with these in data list. The RIMT average value, SD and ROI length of the exams
are displayed at the bottom of the graphic (including the current exam).
– Previewing the report: tap [Preview] to show IMT. The RIMT average value, SD and ROI
length of the exams are displayed.
For details about report operation, refer to “Advanced Volume”.
7. Tap [RIMT] again to exit.
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