Mindray DC-80A, Руководство оператора

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5-74 Image Optimization
5.11 Contrast Imaging
2D contrast imaging is used in conjunction with ultrasound contrast agents to enhance imaging of blood
flow and microcirculation. Injected contrast agents re-emit incident acoustic energy at a harmonic
frequency much more efficient than the surrounding tissue. Blood containing the contrast agent stands
out brightly against a dark background of normal tissue.
Contrast imaging is an option.
The SP5-1E, and SC6-1E probes support contrast imaging.
Caution:
1. Set MI index by instructions in the contrast agent accompanied
manual.
2. Read contrast agent accompanied manual carefully before using
contrast function.
NOTE: Make sure to finish parameter setting before injecting the agent into the patient to avoid
affecting image consistency. This is because the acting time of the agent is limited.
The applied contrast agency should be compliant with the relevant local regulations.
5.11.1 Basic Procedures for Contrast Imaging
To perform a successful contrast imaging, you should start with an optimized 2D image and have the
target region in mind. To perform a contrast imaging:
1. Select an appropriate probe, and perform 2D imaging to obtain the target image, and then fix the
probe.
2. Tap [Contrast] on the touch screen or press user-defined key for contrast imaging (Assign a key as
user-defined contrast imaging: the setting path is "[Setup]
→ [System] → [Key Config]", see “12.1.6
Key Configuration” chapter for details) to enter the contrast imaging mode.
3. Adjust the acoustic power experientially to obtain a good image.
Touch [Dual Live] to be “On” to activate the dual live function. Observe the tissue image to find the
target view.
4. Inject the contrast agent, and set [Timer 1] at “ON” to start the contrast timing. When the timer
begins to work, the time will be displayed on the screen.
5. Observe the image, use the touch screen button of [Pro Capture] and [Retro Capture] or the user-
defined key (usually “Save1” and “Save2”) to save the images. Press <Freeze> to end the live
capture.
Perform several live captures if there are more than one interested sections.
6. At the end of a contrast imaging, set [Timer 1] as “OFF” to exit the timing function. Perform
procedures 3-5 if necessary.
For every single contrast imaging procedure, use [Timer 2] for timing.
If necessary, activate destruction function by touching [Destruct] as “ON” to destruct the micro-
bubbles left by the last contrast imaging; or to observe the reinfusion effect in a continuous agent
injecting process.
7. Exit contrast imaging.
Tap [Contrast] on the touch screen or press user-defined key to exit the contrast imaging mode; or,
press <B> button to return to B mode.