Safety
HD11 XE Getting Started
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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 may automatically adjust pulser voltage to stay below the system max-
imums. A decrease in pulser voltage will also decrease MI.
Sector Width
A narrower 2D sector width in Color imaging will increase color frame rate. The
TI will increase. MI will not change. If pulsed Doppler is also enabled, then pulsed
Doppler will remain the dominant mode and the TI change will be small.
M-mode and Doppler Controls
Combination Modes
Use of combination modes affects both the TI and MI through the combination of
pulse types. During duplex, the TI will display the dominant pulse type. The dis-
played MI will be from the mode with the largest MI value.
Gate Depth
When Doppler gate depth is increased the Doppler PRF may automatically
decrease. An increase in PRF will increase the TI. The system may also automati-
cally decrease the pulser voltage to remain below the system maximum. A
decrease in pulser voltage will decrease MI.
Other
2D, Color, M-mode, CPA, PW, and CW
When a new imaging mode is selected, both the TI and MI may change to default
settings. Each mode has a corresponding pulse repetition frequency and maximum
intensity point. In combined or simultaneous modes, the TI is the sum of the con-
tribution from the modes enabled and the displayed MI is the largest of the MI val-
ues associated with each mode and focal zone enabled. The system will return to
the previously selected state if a mode is turned off and then reselected.
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