Combinational with B, COLOR and PW: Use of combination modes affects the TI and MI
through the combination of pulse types. Because the TI is additive, simultaneous pulsing of
B, COLOR and PW modes may cause larger TI values than sequential pulsing (e.g. auto-
update). The displayed MI will be from the pulses with the largest peak pressure.
Image Presets: Changing the image presets may indirectly change the PW and/or color
sensitivity. Increasing the sensitivity could increase the TI values.
PW Doppler Controls
Velocity Scale: Increasing the Velocity scale may increase the TI by increasing the pulse
repetition frequency.
PW Gate Size: A smaller PW Gate size may increase the allowable pulse repetition
frequency which may increase TI.
PW Gate Position: A shallower PW Gate position may increase the allowable pulse
repetition frequency and may increase TI.
Operating Frequency: Changing the operating frequency will affect both the displayed MI
and TI values because the beam formation is affected and transducer efficiencies may differ
between frequencies.
Combinational with B-Mode: Use of combination modes affects the TI and MI through the
combination of pulse types. Because the TI is additive, simultaneous pulsing of B and PW
modes may cause larger TI values than sequential pulsing (e.g. auto-update). The
displayed MI will be from the pulses with the largest peak pressure.
Image Presets: Changing the image presets may indirectly change the PW sensitivity.
Increasing the sensitivity could increase the TI values.
CW Doppler Controls
CW Gate Position: Changes in the CW Gate position may change the MI or TI.
Operating Frequency: Changing the operating frequency will affect both the displayed MI
and TI values because the beam formation is affected and transducer efficiencies may differ
between frequencies.
Image Presets: Changing the image presets may indirectly change the CW sensitivity.
Increasing the sensitivity could change the TI values.
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