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M–Mode
LOGIQ 500 Basic Users Manual
2276612–100 Rev. 0
5–76
Controls
M/D Cursor
Zoom (M-Mode)
Description
Entering M-Mode automatically
assigns trackball control to the M/D
Cursor.
Acoustic zoom can be accomplished while in
M-Mode. The B-Mode reference image does
not zoom but the M-Mode display will enlarge.
Display (freeze) zoom is not available with
M-Mode. See Figure 5–35.
Accessing/
Changing
To enable trackball control of the
M/D cursor, press the M/D Cursor
key. The M-Mode cursor line
changes color.
To terminate trackball control of the
M/D cursor, press Set. The M-Mode
cursor line changes color.
To access zoom while in B/M-Mode, press the
Zoom key.
Rotate the Zoom Size control to adjust the size
of the zoom area cursors.
Use the Trackball to move the zoom area
vertically along the M-Mode cursor line.
Press Set to fix the zoom function and continue
scanning.
Press Clear to exit the zoom function.
Benefits
Allows for repositioning of the
M-Mode cursors after the trackball
has been assigned a different
function.
Allows for expanding a region of interest over
the entire M-Mode timeline display.
Values
On or Off.
The M-Mode cursor displays in the
center of the screen or changes to
the active color if already present.
Acoustic zoom has magnification values of 1,
1.2, 1.5, 2, 2.5, 3.0 and 4.0. The default value is
set in the Set Up/Custom Display menu page 1.
Affects on
Other Controls
Terminates trackball control from its
current function and assigns it to the
M-Mode cursor.
Changes the transmit focal point position when
moved vertically.
Bioeffects
Acoustic
Output
Hazard
Moving the focal zone affects acoustic output by
bringing the near field closer and by adding focal
zones. The amount of increase varies
depending on the probe and its frequency.
Adding focal zones tends to increase TI,
although it may decrease MI.
Observe the output display for possible effects.
Figure 5–35. Zoom (M-Mode) Display
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