GE HEALTHCARE PROPRIETARY TO GE
D
IRECTION 5394227, 12 LOGIQ S8/LOGIQ E8 SERVICE MANUAL
Section 4-4 - Functional Checks 4 - 25
4-4-7 M-Mode Checks
For information on the system’s different modes as well as expected results, the Basic User Manual or
User Guide will familiarize you with image optimization for B-Mode, M-Mode, Color Flow, and Doppler.
4-4-7-1 Preparations
Use a phantom (optional) when doing these tests.
1.) Connect one of the probes, to the scanner’s active probe connector.
- see: 3-6-4 "Connecting Probes" on page 3-15 for info about connecting the probes.
- For available probes, see: Section 9-13 "Probes" on page 9-59.
2.) Turn ON the scanner. The B-Mode window is displayed (default mode).
3.) Press M-Mode knob on the operator panel to bring up an M-Mode image on the screen.
Table 4-1 B/M-Mode Functions
Control Description
Power Output (Acoustic
Power)
Optimizes image quality and allows user to reduce beam intensity. 10% increments between 0-100%.
Values greater than 0.1 are displayed
Dynamic Range
Controls how echo intensities are converted to shades of gray, thereby increasing the adjustable
range of contrast.
Focus Number and Position
Increases the number of transmit focal zones or moves the focal zone(s) so that you can tighten up
the beam for a specific area. A graphic caret corresponding to the focal zone position(s) appears on
the right edge of the image.
Rejection
Selects a level below which echoes will not be amplified (an echo must have a certain minimum
amplitude before it will be processed).
Frame Average
Temporal filter that averages frames together. This has the effect of presenting a smoother, softer
image.
Colorize Enables gray scale image colorization. To deactivate, reselect a Gray Map.
Gray Map Determines how the echo intensity levels received are presented as shades of gray.
Rotation (Up/Down) Rotates the image by selecting the value from the pop up menu.
Frequency
Multi Frequency mode lets you downshift to probe's next lower frequency or shift up to a higher
frequency.
Frame Rate/Resolution Optimizes B-Mode frame rate or spatial resolution for the best possible image.
Sweep Speed Changes the speed at which the timeline is swept.
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