6 Image Acquisition
Operator’s Manual 6 - 37
– Circumferential Rotation curve: The X-axis represents time (s); the Y-axis represents
rotation of the tissue (Deg).
– Circumferential Rotation Rate curve: The X-axis represents time (s); the Y-axis represents
rotation by time (Deg/s).
Torsion & Torsion Rate Curve
The system provides left ventricular torsion data based on short axis sections of PSAX AP and
PSAX B. Torsion is acquired by calculating difference of apex and base of the heart.
Torsion = PSAX AP Rot. - PSA XB Rot.
• The X-axis represents time (s).
• The Y-axis represents tortion by time (Deg/s).
6.14.6 Bulleye
After tracking, the system can display Bull’s Eye graph, so as to judge reverse movement or scope
of myocardium.
1. Tap [Bull's Eye] on the touch screen to turn on the function:
You can acquire:
– Time to peak value and peak value of the 17 segments (similar to 16 segments);
– Display measurement result EDV/ESV/EF/TPSD.
2. Use [Parameter] on the touch screen to see different parameter bull’s eye graph.
“-” will display in the table to indicate those segments that are not well tracked.
6.14.7 Measurement/Comment
Under tissue tracking QA mode, only Time measurement is available. For details, please refer to
Operator’s Manual “Advanced Volume”.
Comments and Body Mark operations are the same as in other modes.
6.14.8 Data Export
The system provides data exporting function, so that you can export calculation result for analysis
(for instance, SPSS analysis).
Tap [Data Export] on the touch screen, to export analyzed data of each segment.
6.15 Smart Fetal HR (Heart Rate)
• This feature is available only under Fetal Echo (High Flow), OB1 Fetal Echo, Fetal Echo (Low
Flow) exam modes.
• During image acquisition, the user is recommended to stably hold the ultrasound probe to
acquire fetal heart ultrasound video. If the Smart Fetal HR measurement is not satisfactory
(e.g., the heart rate cycles are not marked accurately on the M-mode image), the user can
manually modify the sampling lines of heart rate cycles on the M-mode image or change the
number of heart rate cycles. The fetal heart rate measurement result will be updated
simultaneously.
This feature is to measure the fetal heart rate automatically on M mode.
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