Samsung H60 Bedienungsanleitung Seite 134

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8-16
Operation Manual
Limited Trace
This is a basic measurement that is only available in Spectral Doppler mode. Specify two bars in a
Spectral Doppler image to calculate the average velocity between the bars, RI, and Pulsatility Index
(PI).
1. Select Limited Trace on the monitor or touch screen. Use the trackball and the Set button on the
control panel to select two bars.
2. When the measurement is nished, its result is shown on the screen.
X
PS: Peak Systolic Velocity
X
MD: Min Diastolic Velocity
X
ED: End Diastolic Velocity
X
TAmax: Time Averaged Max Velocity
X
TAMEAN: Time Average Mean Velocity
X
PI: Pulsatility Index
X
RI: Resistivity Index
X
PS/ED: PS ED Ratio
X
ED/PS: ED PS Ratio
X
HR
The equations used for D Limited Trace measurement are as follows:
X
Duration of flow
VTI
meanV =
X
PS
EDPS
RI
=
X
Vmean
EDPS
PI
=
X
2
1
21
/
V
V
VV =
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