GE Vivid E9, Руководство по обслуживанию

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GE H
EALTHCARE
D
IRECTION
GA091568, R
EVISION
5 VIVID E9 S
ERVICE
M
ANUAL
4 - 40 Section 4-3 - Functional checks
4-3-4 Color Mode Checks
4-3-4-1 Introduction
Color Flow screens are 2D or M Mode screens with colors representing blood or tissue movement.
Color Flow may be selected both from 2D mode or from M mode or a combination of these.
4-3-4-2 Preparations
1.) Connect one of the probes to the scanner’s left-most probe connector.
- See "Connecting Probes" on page 3-24 for info about connecting the probes.
2.) Turn ON the scanner.
The 2D Mode window is displayed (default mode).
4-3-4-3 Select Color 2D Mode
1.) From an optimized 2D image, press Color.
2.) Use the trackball (assigned function: Pos) to position the ROI frame over the area to be examined.
3.) Press
Select . The instruction Size should be highlighted in the trackball status bar.
NOTE: If the trackball control Pointer is selected, press trackball to be able to select between Position
and Size controls.
4.) Use the trackball to adjust the dimension of the ROI.
4-3-4-4 Adjust the Color 2D Mode controls
• Adjust the Active mode gain to set the gain in the color flow area.
• Adjust Scale to the highest setting that provides adequate flow detection.
NOTE: The scale value may affect FPS, Low Velocity Reject, and Sample Volume.
• Adjust Low Velocity Reject to remove low velocity blood flow and tissue movement that reduces
image quality.
• Adjust Variance to detect flow disturbances.
• Adjust Sample volume (SV) to a low setting for better flow resolution, or a higher setting to more
easily locate disturbed flows
• Adjust Frequency to optimize the color flow display. Higher settings improve resolution. Lower
settings improve depth penetration and sensitivity. This does not affect the frequency used for 2D
and M-Mode.
NOTE: NOTE: Frequency setting may affect FPS, SV and Low Velocity Reject.
• Adjust Power to obtain an acceptable image using the lowest setting possible.
NOTE: The Power setting affects all other operating modes.