GE Vivid S70, Руководство пользователя

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Image Optimization
5-54
Vivid S70 / S60
–
User Manual
BC092760-1EN 01
Color Maps
All modes Displays the
Color
menu for selection of different color maps.
Tissue priority
CF Emphasizes either the color of the color mode or the grey scale tissue detail of the
2D image. Tissue priority is available in both Live and Freeze.
Sample volume
CF Adjusts the size of the color flow Doppler sampling area. Lower setting gives better
flow resolution while a higher setting increases sensitivity and helps to locate
turbulent flows.
Low Velocity Rejection (LVR)
CF LVR, also called Wall motion filter, enables the extent of low velocity removal to be
adjusted. Color data produced by very low flow may cause interference.
Doppler Enables the low velocity portions of the spectrum to be filtered, since the Doppler
spectrum and audio may contain strong wall-motion signals. The amount of Low
Velocity Reject is indicated by the green vertical bar at the right end of the baseline.
Lateral averaging
CF, TVI, TT, SRI, SI Smooths the image by averaging collected data along the same horizontal line. An
increase of the lateral averaging will reduce noise, but this will also reduce the
lateral resolution.
Radial averaging
CF, TVI, TT, SRI, SI Smooths the image by averaging collected data along the same radial line. An
increase of the radial averaging will reduce noise, but this will also reduce the
radial resolution.
LPRF
PW Doppler Sets the Pulse Repetition Frequency (PRF) for the PW Doppler acquisition of flow
data. Enables toggling between high and low Pulse Repetition Frequency (PRF).
When the Doppler PRF is raised beyond a certain limit, more than one Doppler
gate is displayed on the screen.