Chapter 1 Safety 1 - 31
▐Color and Power Controls
Color Sensitivity
Increasing the color sensitivity may increase the TI. More time is spent scanning for color images.
Color pulses are the dominant pulse type in this mode.
Color Sector Width
Narrower color sector width will increase color frame rate and the TI will increase. The system
may automatically decrease pulse voltage to stay below the system maximum. A decrease in
pulse voltage will decrease the MI. If pulsed Doppler is also enabled, then pulsed Doppler will
remain as the primary mode and the TI change will be small.
Color Sector Depth
Deeper color sector depth may automatically decrease color frame rate or change color focal zone
or color pulse length. The TI will change due to the combination of these effects. Generally, the TI
will decrease with increased color sector depth. MI will correspond to the peak intensity of the
dominant pulse type, which is a color pulse. However, if pulsed Doppler is also enabled then pulsed
Doppler will remain the dominant mode and the TI change will be small.
Scale
Using the SCALE control to increase the color velocity range may increase the TI. The system will
automatically adjust pulse voltage to stay below the system maximums. A decrease in pulse
voltage will also decrease MI.
Sec Width
A narrower 2D-mode sector width in Color imaging will increase color frame rate. The TI will
increase and the MI will not change. If pulsed Doppler is also enabled, then pulsed Doppler will
remain as the primary mode and the TI change will be small.
▐M Mode and Doppler Controls
Speed
M-Mode and Doppler sweep speed adjustments will not affect the MI. When M-Mode sweep
speed changes, TI changes.
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