M-Mode Checks - GE LOGIQ S8 Service Manual

GE H
EALTHCARE
D 5394227, 12
IRECTION
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.
Table 4-1
Control
Power Output (Acoustic
Power)
Dynamic Range
Focus Number and Position
Rejection
Frame Average
Colorize
Gray Map
Rotation (Up/Down)
Frequency
Frame Rate/Resolution
Sweep Speed
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.
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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.
PROPRIETARY TO GE
B/M-Mode Functions
Optimizes image quality and allows user to reduce beam intensity. 10% increments between 0-100%.
Values greater than 0.1 are displayed
Controls how echo intensities are converted to shades of gray, thereby increasing the adjustable
range of contrast.
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.
Selects a level below which echoes will not be amplified (an echo must have a certain minimum
amplitude before it will be processed).
Temporal filter that averages frames together. This has the effect of presenting a smoother, softer
image.
Enables gray scale image colorization. To deactivate, reselect a Gray Map.
Determines how the echo intensity levels received are presented as shades of gray.
Rotates the image by selecting the value from the pop up menu.
Multi Frequency mode lets you downshift to probe's next lower frequency or shift up to a higher
frequency.
Optimizes B-Mode frame rate or spatial resolution for the best possible image.
Changes the speed at which the timeline is swept.
see: 3-6-4 "Connecting Probes" on page 3-15
For available probes, see:
Section 4-4 - Functional Checks
Description
for info about connecting the probes.
Section 9-13 "Probes" on page
LOGIQ S8/LOGIQ E8 S
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ERVICE ANUAL
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