Mindray Eagus TEX21 - Select Image and Cardiac Cycle; Myocardial Boundary Tracing

6 - 40 Operator’s Manual
6 Image Acquisition
6.21.3 Select Image and Cardiac Cycle
You can select images with a better image quality so as to guarantee the analysis result.
Switch the cine file
1. Tap [Review] to enter the review state.
2. Double-click the target file.
3. The system closes current displayed file and switch to the newly selected file.
Switch cardiac cycle within the cine file
Drag MVC and MVC’ to select when opening a cine which includes multiple cardiac cycles.
6.21.4 Myocardial Boundary Tracing
Tracing
The system provides 3 kinds of tracing method: Auto method, 3-point method and manual tracing
method.
• 3-point method
4. 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
).
5. 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.
• EF (for long axis section): Ejection fraction
•HR: Heart rate
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
][
{}
NiTP
i
,1| ∈
TP
()
N
TPTP
TPSD
N
i

−
=
1
2