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
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