Mindray DC-80A, Operator'S Manual

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5-6 Image Optimization
Imaging Adjustment
Description More information can be obtained without moving the probe or changing the sampling
position.
FOV (Field of
View)
1. To change the scan range, touch [FOV] on the touch screen to enter the FOV
range and FOV position adjustment status.
2. Press <Set> to switch between FOV range and FOV position.
3. Rotate the trackball to adjust the FOV position or the FOV range.
When the scan range is adjusted to its widest, the FOV position cannot be changed.
Or you can adjust the focus by the mapping-menu on the touch screen.
You can get a much larger field of view when selecting a larger FOV.
The frame rate decreases when using a larger FOV.
B Steer
Use the <Angle/Steer> deflector rod on the control panel to adjust the steer angle.
ExFOV
(Extended
FOV)
Touch [ExFOV] or the mapping-menu item on the touch screen to turn the function
on/off.
For linear probes, the ExFOV function displays as trapezoid imaging.
For convex probes, the ExFOV function displays as extending the scanning angle.
Impacts
The FOV position/range is available only for convex and phase probes.
The ExFOV function is available only for linear and convex probes.
The B Steer function is available only for linear probes.
Line Density
Description The function determines the quality and information of the image.
Operations Adjust the line density using the [Line Density] item or the mapping-menu item on the
touch screen.
There are four levels of line density available: UH, M, H, L.
Effects The higher the line density, the higher the resolution.
Impacts The higher the line density, the lower the frame rate.
Dynamic Range
Description This function is used to adjust the B image resolution to compress or expand the gray
display range. The real-time value displays in the image parameter area in the top-
right corner of the screen.
Operations Adjust the dynamic range through the [Dyn Ra.] item or mapping-menu on the touch
screen.
Rotate the knob clockwise to increase the value. Rotate the knob counterclockwise to
decrease the value.
The adjusting range is 30-240dB.
Impacts The more the dynamic range, the more specific the information and the lower the
contrast with more noise.