GE Vivid E9

GE H EALTHCARE
D IRECTION GA091568, R EVISION 5 VIVID E9 S ERVICE M ANUAL
Chapter 4 - General procedures and Functional checks 4 - 39
4-3-3 M Mode Checks
4-3-3-1 Introduction
4-3-3-2 Preparations
1.) Connect one of the probes, to the scanner’s left-most probe connector.
-See 3-7-6 "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).
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.
4-3-3-3 Adjust the M Mode controls
These 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.
Figure 4-38 M-Mode Screen Example