Spectral Doppler Mode
7.1.2 PW Operation
The PW Operation includes: Gate Position & Gate Width (chapter 7.1.2.1)
Activation of PW Mode
(chapter 7.1.2.2)
PW Gain Control (chapter 7.1.2.3)
PW Automatic Optimization
(chapter 7.1.2.4)
Sweep Speed
(chapter 7.1.2.5)
Audio Signal
(chapter 7.1.2.6)
Invert
(chapter 7.1.2.7)
Angle Correction
(chapter 7.1.2.8)
Baseline
(chapter 7.1.2.9)
WMF
(chapter 7.1.2.10)
Velocity Range (PRF)
(chapter 7.1.2.11)
Real Time Trace
(chapter 7.1.2.12)
Freeze
(chapter 7.1.2.13)
PW Cineloop
(chapter 7.1.2.14)
7.1.2.1 Gate Position and Gate Width
In Pulsed Wave Doppler, a specific area along the ultrasound beam is sampled. This area is called the
gate. The gate is located on the ultrasound beam and is displayed by two lines perpendicular to the
beam line. You can change the location and size of the gate. The location of the gate can be changed
with the trackball, the width of the gate can also be changed with the trackball (press the upper
trackball key to change the function of the trackball).
Location of the gate allows examination of the blood flow at this site. When changing the gate size, in
update or simultaneous mode, the current value of it is displayed in millimeters on the left side of the
display in the image info.
Adjust the PW cursor and Gate Position with the trackball on the 2D single image.
←→ PW cursor position
↑↓ Depth of gate position
The gate size can be adjusted in five steps: 1mm, 2.5mm, 5mm, 10mm, 15mm.
Press the upper trackball key to change from PW cursor and Gate position to gate
size, press it once more to return to the position change.
The upper trackball key switches between gate position and gate width.
↑ decrease the gate size
↓ increase the gate size
Voluson
®
730Pro - Basic User Manual
7-4 105831 Rev. 0
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