Pw Mode Imaging - IMV EXAPad Instruction Manual

6. PW Mode imaging

6.1 Position and size of the PW gate
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PW: Start PW imaging. Activate Pulse Wave, PW specter is
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added to the B image.
Frequency: Adjust PW frequency
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PRF: Adjust Pulse Repetition Frequency. Updated PRF value in
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Hz is displayed in the PRF button on the screen
4 Base Line: Adjust PW spectrum base line
Steering: Adjust the angle of the PW gate
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B: Deactivate Pulse Wave
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Position: When activated, the track pad will reposition the PW
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gate
8 Size: When activated, the track pad will resize the PW gate.
Slide up to increase size and down to decrease
9 Position Box: Track pad
Access the advance adjustments menu by tapping at the right-
hand side of screen.
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The PW gate is
a continuous
line around
the B image
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Time Scale: Adjust PW Time scale
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Analog Gain: Adjust analog gain for PW. Different scale from
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general gain which is digital gain.
Audio: Adjust audio level
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Power: Adjust PW power
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Wall Filter: Adjust wall filter. This filter is filtering low frequencies
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linked to vascular wall movements
6 Spectrum Inversion: Display of PW Spectrum can be inversed
Angle: The angle made by the Doppler firing and the
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measured flow is activated in the advanced adjustment menu.
When Angle is activated, the angle is displayed on the PW
gate and button "Angle" is available under the trackpad.
Sliding the finger upwards and downwards on the trackpad
adjusts the angle in the direction of the flow in order to
measure the real speed of the flow.
After modifying the size or the position of the PW gate, press
the button "Angle" under the trackpad again in order to
activate the angle adjustment.
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