Mindray Ana, Руководство оператора

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6 Image Acquisition
Operator’s Manual 6 - 29
3 Display curve: Velocity/
Displacement/Strain/Strain Rate. Each curve on the image is matched with a certain segment in the
cardiac segmentation model (6), identified by different colors.
• Velocity curve: X-axis represents time (s); Y-axis represents
velocity (cm/s).
• Displacement curve: X-axis represents time (s); Y-axis
represents displacement (mm).
• Strain curve: X-axis represents time (s); Y-axis represents
deformation of the tissue (%).
• Strain-rate curve: X-axis represents time (s); Y-axis represents
strain by time (s
-1
).
4 Displays ECG trace /
5 Displays cardiac segmentation
model, and each segment name is
illustrated beneath the model. • In the figure, marks the peak position of the curve.
• Under tracking status, click on a segment in the cardiac
segmentation model. The segment has “X” mark and its
corresponding calculating is eliminated.
• Tap certain segment in the cardiac segmentation model, the
segment will turns grey and its corresponding curve no longer
displays.
• You can get the current X/Y axis value by moving the cursor
onto one point on the curve; and if you press <Set> at this time,
the frame marker will move to the spot.
The segment boundary color indicates the tracking quality.
6 Displays measurement and
calculation results • EDV: Maximum value of the end diastolic volume during the
trace.
• EDA: Maximum value of the end diastolic area (Left
Ventricular) during the trace.
• ESV: Maximum value of the end systolic volume (Left
Ventricular) during the trace.
• ESA: Maximum value of the end systolic area (Left Ventricular)
during the trace.
• FAC (for short axis section): Fractional Area Change= (EDA —
ESA)/EDA
• EF (for long axis section): Ejection fraction
• HR: Heart rate
• Global strain of all segments.
• Displays when strain rate curve is acquired.
• Global strain rate of all segments.
• Displays when strain rate curve rate is acquired.
Also on Bull’s Eye figure, the system displays TPSD value:
Time to Peak Standard Deviation (TPSD):
Where, standardized value of time to peak data:
.
(N is the number of time to peak data) Average value of
standardized value of time to peak data:
, and the standard
deviation is
] [
{ }
N i TP
i
, 1 |
∈
TP
( )
N
TP TP
TPSD
N
i

−
=
1
2