Table of Contents
Advertisement
Chapter 7 - System Operation
Table 7-38: CW Mode Main Menu Controls
Parameter
Scale
LVRej
Layout
Auto Calcs
Quick Angle
Baseline
Trace
CW Mode Soft Menu Controls
Table 7-39: CW Mode Soft Menu Controls
Parameter
Freq.
Rejection
DR
Angle
Map
Tint
158
Description
Enables the low velocity portions of the spectrum to be fil-
tered, since the Doppler spectrum and audio may contain
strong wall-motion signals. The scale value may affect FPS
and LVRej. The selected scale is displayed in the status
window.
Insulates the Doppler signal from excessive noise from
vessel movement.
Toggles the display arrangement to define relative dimen-
sions of the 2D area, CW-mode area, and their position
which is top/bottom, side to side and Full PW. Layout is
available in live and Freeze.
Calculates the relevant measurements of one heart cycle
automatically.
Corrects the Doppler velocity scale by defining the angle
between the Doppler beam and investigated blood vessel
or blood flow. A thin cross bar on the Doppler cursor will
rotate as the control is adjusted. Quick angle adjusts the
angle by 60 degrees.
Adjusts the baseline to accommodate faster or slower
blood flows to eliminate aliasing.
Traces maximum or average trajectory of the spectrum
Description
Adjust Doppler transmission frequency to control sensitiv-
ity and penetration. Adjusting Freq. may affect Scale and
LVRej settings. The selected Freq. is displayed in the status
window.
Removes the undesirable background noise from the
Doppler spectrum, resulting in a darker background.
Rejection is available in Live and Freeze.
Enables control of the dynamic range or contrast of the
image. When dynamic range is set high, the image is
softer and more low-level data is visible.
Estimates the flow velocity in a direction at an angle to the
Doppler vector by computing the angle between the
Doppler vector and flow to be measured.
Display different Doppler colorization maps. Map is avail-
able in Live and Freeze.
Adjusts Doppler spectrum tint. Tint is available in live and
Freeze.
Portable Ultrasound Diagnostic Scanner User Manual
Imaging Mode
Advertisement
Table of Contents
