GE LOGIQ 7 Basic User Manual

Optimizing Spectral Doppler
LOGIQ 7 Online Help 5-101
Direction 2392536-100 Rev. 1
Wall Filter
Description Insulates the Doppler signal from excessive noise caused from
vessel movement.
Adjusting To increase/decrease, select Wall Filter, then adjust Wall Filter
on the Touch Panel (PRF and Wall Filter share the same
control. Press the control to toggle between PRF and Wall
Filter). Each adjustment cycles you to the next setting.
Values Values vary, depending upon the probe and application. The
current value displays on the Touch Panel and the monitor. Wall
Filter values are returned to the factory or user preset value
when you change the following: Probe, Exam Category, Exam
Calcs, New Patient.
Benefits Gets rid of excess, unnecessary information. Cleans out low
level noise above and below the baseline so you don't see or
hear it on the spectrum.
Affect on other
controls
Wall filter may be changed by changes to the velocity scale.
Baseline
Description Adjusts the baseline to accommodate faster or slower blood
flows to eliminate aliasing.
Adjusting Baseline adjusts the point in the spectrum where the velocity
trace is at zero. The default baseline is at the midpoint of the
spectrum. To shift the baseline, adjust Baseline on the Touch
Panel.
The baseline displays as a solid line running across the
spectrum. The baseline is raised and lowered in equal
increments, depending on the current Doppler scale factor. The
control does not wrap when the maximum baseline shift (in
either direction) has been reached.
Values 12% increments, with 0 being the center of the display and
+100% being the top edge of the display and -100% being the
bottom edge of the display. Baseline values vary by probe and
application and are returned to the factory or user preset value
when you change: Probe, Exam Category, Exam Calcs, or New
Patient.
Benefits Unwraps the alias. Rearranges the velocity scale without
changing the velocity scale. Readjusts the positive and negative
velocities limit without changing the total velocity range.

GE LOGIQ 7 Specifications

General

Brand	GE
Model	LOGIQ 7
Category	Medical Equipment
Language	English