GE Vivid S6 N - 4-4-2-1 Preparations; 4-4-2-2 Adjust the M Mode Controls; 4-4-3 Color Mode Checks; 4-4-3-1 Introduction

GE
P
ART NUMBER FN091065, REVISION 2 VS5 N AND VS6 N SERVICE MANUAL
4-40 Section 4-4 - Image Testing
PRELIMINARY
4-4-2-1 Preparations
1.) Connect one of the probes.
See ‘Connecting Probes” on page 3-71 for information about connecting the probes.
2.) Turn ON the scanner.
The 2D Mode window is displayed (default mode).
3.) Press MM on the Operator panel to bring up an M-Mode picture on the screen.
4.) Use the trackball to position the cursor over the required area of the image.
4-4-2-2 Adjust the M Mode Controls
The following Image Controls are used to optimize the M mode picture.
Verify that all the listed controls are working as intended:
•Adjust Horizontal sweep to optimize the display resolution.
•Adjust Gain and TGC controls to adjust the range to be imaged.
•Use the Frequency (move to higher frequencies) or the Frame rate control (move to lower frame
rate) to increase resolution in image.
•Use the Frequency (move to lower frequency) to increase penetration.
•Adjust Focus to move the focal point(s) around the region of interest in the M-Mode display.
•Adjust Dynamic range to optimize the useful range of incoming echoes to the available grey scale.
•Adjust Compress and Edge Enhance to further optimize the display.
•Adjust Reject to reduce noise while taking care not to eliminate significant low-level diagnostic
information.
4-4-3 Color Mode Checks
4-4-3-1 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.
4-4-3-2 Preparations
1.) Connect one of the probes to the scanner’s left-most probe connector.
See ‘Connecting Probes” on page 3-71 for information about connecting the probes.
2.) Turn ON the scanner.
The 2D Mode window is displayed (default mode).
4-4-3-3 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.
4-4-3-4 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.