Mindray M5 Exp, Руководство оператора

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Image Optimization 5-25
Operation
Select the frequency value through the [Frequency] item in the soft menu
or menu.
Or adjust it in the image parameter area.
Values of frequency vary depending upon the probe types.
Select the frequency according to the detection depth and current tissue
characteristics.
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 color flow, which is
adjusted through PRF in the system. The real-time PRF value will be
displayed in the image parameter area in the upper left corner of the
screen.
Operation
Adjust the speed range through the [Scale] item in the menu or the soft
menu.
The adjusting range varies by frequency, probe and depth; adjust
according to the actual situation.
Effects
To provide a much clearer color flow image.
Use low PRF to observe low-velocity flows, and use high PRF to observe
high-velocity flows.
Impacts
Aliasing may occur if 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.
Operation
Press <iTouch> on the control panel to enter the iTouch status, the symbol
of which will be displayed in the image parameter area of the screen.
You can preset the mode for iTouch function.
It is not available in the CW mode.
Auto Calculation and Auto Calculation Parameter
Description
This function is used to trace the spectrum and calculate parameters of
PW/CW mode image, and the results of which are displayed in the result
window.
Operation
Click [Auto Calc] in the soft menu or menu to turn on or off the function.
Select parameters in the dialogue box prompted by clicking [Auto Calc
Param].
In real-time scanning, the results displayed are derived from the calculation
of latest cardiac cycle.
In the freezing and cine status, the results displayed are calculated from
the current selected area.
You can define user-defined key for auto calculation function in "[Setup] ->
[System Preset] -> [Key Config]".