Mindray Ana, Руководство оператора

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6 Image Acquisition
Operator’s Manual 6 - 7
1. Select a premium image during B mode or B+ Color scan, and adjust to place the area of
interest in the center of the image.
2. Press <P> to enter B+Power mode.
3. Use the trackball/trackpad and <Set> to change position and size of the Region of Interest
(ROI).
4. Adjust the image parameters during scan to obtain optimized images.
6.3.2 Power Mode Image Parameters
Because both are based on Doppler color imaging, the adjustments of Power mode are same with
these of Color mode’s. Hence, only the adjustments of Power mode are introduced.
Power Gain
Refers to the overall sensitivity to flow signals, and this function is used to adjust the gain in Power
mode. The real-time gain value is displayed in the image parameter area.
Color Map
This feature indicates the display effect of power image. The maps in Power mode image are
grouped into two categories: Power maps and Directional Power maps.
•
The Power maps provide information of blood flow, which are highly sensitive to the low-
velocity flows.
• The Directional Power maps provide information of flow direction.
Dynamic Range
This function is to adjust the transformation of echo intensity into color signal.
Increasing dynamic range will lead to higher sensitivity to low-power signals, thus enhances the
range of signals to display.
6.4 TDI
TDI mode is intended to provide information of low-velocity and high-amplitude tissue motion,
specifically for cardiac movement.
There are 4 types of TDI mode available:
•
Tissue Velocity Imaging (TVI): This imaging mode is used to detect tissue movement with
direction and speed information. Generally the warm color indicates the movement towards
the transducer, while the cool color indicates the movement away from the transducer.
• Tissue Energy Imaging (TEI): This imaging mode reflects the status of cardiac movement by
providing the energy information, the larger the energy is, the brighter the color becomes.
• Tissue Velocity Doppler Mode (TVD): This imaging mode provides direction and speed
information of the tissue.
• Tissue Velocity M Mode (TVM): This function assists to observe the cardiac motion through a
direct angle.
TIP:
TDI is optional.
6.4.1 TDI Mode Image Scanning
Perform the following procedure: