Mindray DC-80A, Руководство оператора

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5-22 Image Optimization
Operation Rotate the knob under [Img Qual.] item or the mapping-menu item on the touch screen
to select the different frequency values.
The adjusting range of frequency values can be divided into 3 levels: penetration
preferred (Pen), general mode (Gen), and resolution preferred (Res).
Select the frequency according to the detection depth and current tissue features.
Effects
The higher the frequency, the better the resolution and sensitivity, and the worse the
force of penetration.
Scale
Description This function is used to adjust the speed range of the flow, which is adjusted using the
PRF in the system.
The real-time PRF value is displayed in the image parameter area in the top-right
corner of the screen.
Operations Rotate the knob under the [Scale] item on the touch screen or through the mapping-
menu item.
Effects
Provides a much clearer color flow image.
Use a low PRF to observe low-velocity flows, and a high PRF to observe high-velocity
flows.
Impacts Aliasing may occur if a low-velocity scale is used and high velocities are encountered.
Low velocities may not be identified when a high-velocity scale is used.
iTouch
Description To optimize image parameters as per the current tissue characteristics for a better
image effect.
Operations Press <iTouch> on the control panel to turn the function on.
Auto-Calculation
Description This function is used to trace the spectrum and calculate the PW/CW mode image
parameters. The results are displayed in the results window.
1. Touch [Auto Calc] on the touch screen or the mapping-menu to turn the auto
calculation function on or off.
2. After the auto calculation function is turned on, touch “Auto Calculation” tab.
Auto
Calculation
Parameter Select parameters in the dialog box prompted by touching [Auto Calc Param] on the
Auto Calculation page.
Auto
Calculation
Cycle To set the heart cycle number for auto-calculation.
Touch [Auto Calc Cycle] on the touch screen to select the cycle number, the adjusting
range is 1-5.
Trace Area
To set the trace area of the Doppler wave in the spectrum map, applicable for auto
calculation, V Max and V Mean display.
To change the trace area, adjust through [Trace Area] item or the mapping-menu item
on the touch screen.
The available selections of trace area are: Above, Below, All.
Trace
To set the smooth level when tracing.