VDO MG 2100 Specifiche Pagina 222

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222 VisualSonics Vevo 2100 Imaging System Operator Manual Rev 1.1
Chapter 34: Analyzing B-Mode images
Time-to-peak window for short axis wall data
Features
Time-to-peak is calculated as the time from the reference axis, 0.000, to the
maximum peak (negative or positive), for each of the segments of the heart in
the specific view.
Low time-to-peak comes displayed in blue and high in red.
The phase measures the synchronicity located between regions of the heart for
a selected time interval. As a method of analysis, the phase in this case is
defined as the first fundamental Fourier harmonic, each one of the curves is
compared to the average curve, and expressed in time delay and percentage
of heartbeats.
Each of the heart sectors is represented by a corresponding graph and a
designated color. You can display all the curves simultaneously or select them
separately.
The parameters time-to-peak and phase are quantified on the color wheel
keys displayed to the left of the charts. The minimum and maximum range is
calculated based on the contour that you trace on the B-Mode image.
You can apply time-to-peak analysis to Velocity, Displacement, Strain and
Strain Rate.
In the right panel, turn all curves or individual curves on or off.
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