Tdi - Mindray DC-40 Operator's Manual

Only the phased probe supports Free Xros CM.
5.8.2.1 Basic Procedures for Free Xros CM
1. In 2D real-time imaging mode, adjust the probe and image to get the desired image,
then fix the probe.
2. Press [TDI] user-defined key to enter TDI imaging and acquire the necessary images.
3. Press the user-defined key for Free Xros CM or tap [Free Xros CM] on the touch
screen to enter Free Xros CM mode.
4. Roll the trackball to define the start point of the sample line on the 2D image.
The cursor displays as
5. Press <Set> to fix the start point. The digital number "1" is marked beside the point.
6. Define the next point using the trackball and <Set> key (tap [Undo] to cancel the
current point and activate the preview point). The system updates the time-motion
curve in real time. The sample line is displayed in green, and each point is marked
with a number in sequence.
7. Repeat Step 6 to finish the sample line.
8. Double-click the <Set> key to end editing. The sample line is displayed in white.
9. Adjust the image parameters to optimize the image, obtain the relevant tissue image
for data analysis, then save the image if necessary.
10. Press the user-defined key again or <B > to exit Free Xros CM mode.
Sample Line Modification
1. To enter curve (sample line) modification status:
For a completed sample line, set [Edit] to "On" and the sample line is editable.
2. Anchor the cursor to a certain point, press the <Set> key to activate the point, then
roll the trackball to drag the point for a desired sample line.
3. Double-click the <Set> key to end editing. The sample line is displayed in white.
Delete a Sample Line
tap [Delete] to delete the selected line. You can re-create a new sample line.
Tip:
The free Xros M mode and Free Xros CM mode parameters are independent of each
other, but their functions are the same. Free Xros CM parameters are not to be
introduced. See the relevant M mode and Free Xros M mode sections.
5.9

TDI

TDI mode is intended to provide information about low-velocity and high-amplitude tissue
motion, specifically for cardiac movement.
4 types of TDI mode are available:
Tissue Velocity Imaging (TVI): this imaging mode is used to detect tissue
movement with direction and speed information. In general, the warm color
indicates movement toward the probe, while the cool color indicates movement
away from the probe.
Tissue Energy Imaging (TEI): this imaging mode reflects the status of cardiac
movement by displaying the intensity of tissue. The brighter the color the less
the intensity.
5-30 Image Optimization
, and can only be moved within the 2D image.