Pw Operation; Gate Position And Gate Width - GE VOLUSON 730Pro Basic User Manual

Spectral Doppler Mode
7.1.2

PW Operation

The PW Operation includes:
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.
←→
↑↓
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.
↑
↓
7-4
Gate Position & Gate Width
Activation of PW Mode
PW Gain Control
PW Automatic Optimization
Sweep Speed
Audio Signal
Invert
Angle Correction
Baseline
WMF
Velocity Range (PRF)
Real Time Trace
Freeze
PW Cineloop
PW cursor position
Depth of gate position
decrease the gate size
increase the gate size
(chapter 7.1.2.1)
(chapter 7.1.2.2)
(chapter 7.1.2.3)
(chapter 7.1.2.4)
(chapter 7.1.2.5)
(chapter 7.1.2.6)
(chapter 7.1.2.7)
(chapter 7.1.2.8)
(chapter 7.1.2.9)
(chapter 7.1.2.10)
(chapter 7.1.2.11)
(chapter 7.1.2.12)
(chapter 7.1.2.13)
(chapter 7.1.2.14)
®
Voluson 730Pro - Basic User Manual
105831 Rev. 0