5-18 Image Optimization
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.
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 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 freeze 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]".
Impacts Note: heart rate value obtained by auto calculation may be of deviation,
please adopt manual measurement or ECG function (optional) to get the
precise value.
Auto Calc Cycle
Description To set the number of heart cycle for auto calculation.
Operations Click [Auto Calc Cycle] on the soft menu or the menu.
Invert
Description This function is used to set the display manner of spectrum.
Operation Turn on or off the function through the [Invert] item in the soft menu.
Select "Auto Invert" in the "[Setup] → [System Preset] → [Image Preset]",
then the color bar can automatically invert when the color flow is steered
to a certain angle to accommodate operator’s habit of distinguishing flow
direction.
Impacts The function is available in real-time imaging, freeze or cine review status.
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