Dynamic Range; Spectral Trace (Trace Method) - GE LOGIQ 7 Basic User Manual

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Optimizing the Image

Dynamic Range

Affect on other

Selecting Trace

Dynamic range controls how echo intensities are converted to

shades of gray, thereby increasing the range of contrast you can

You access Doppler dynamic range from the Doppler Mode

Touch Panel. Each click cycles you to the next setting. To

increase/decrease, press Dynamic Range.

The settings cycle in 4 dB increments. The current value

displays on the Touch Panel. Dynamic Range values vary by

probe and application and are returned to the factory or user

preset value when you change the following: Probe, Exam

Category, Exam Calcs, or New Patient.

Optimizes the image's texture and smoothness by increasing

the amount of gray scale. You decrease the dynamic range to

clean out the spectrum to determine if the broadening is actual

or not. You increase the dynamic range to fill in the spectrum,

according to your personal preference.

Dynamic range operates only in realtime, not in freeze, CINE,

CINE Timeline, or VCR playback and affects Doppler gain.

Traces the average mean and peak velocities in realtime images

and spectral broadening in frozen images.

Select the spectral trace method from Trace Method.

To activate the Spectral Trace Touch Panel, press

To get a peak trace, click MAX TRACE. A green trace displays

on the spectrum.

To get a mean trace, click MEAN TRACE. A blue trace displays

on the spectrum.

SELECT TRACE lets you indicate whether cardiac cycle

detection, and therefore cardiac cycle identification, should use

peak timeline data above, below, or above and below

(composite) the baseline.

Broadening may indicate turbulence.

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