C-1
Appendix C Measurement Accuracy
Within the selected field range, the measurement accuracy is ensured within the range
mentioned above. The accuracy specifications are performance in the worst conditions, or
based on the real test for the system.
Depth and time
Item Error range
Depth
Range: full screen
≤±4%
M-mode image
time
Range: full time-axis display
≤±0.3%
Accuracy of Measurement
Item Error range
Distance/Depth
Range: full screen
≤±4%, or <2 mm if measured value is less than 40 mm
Area (Trace)
Range: full screen
≤±8%, or <130
2
mm if measured value is less than 1600
2
mm
Area (Ellipse)
Range: full screen
≤±8%, or <130
2
mm if measured value is less than 1600
2
mm
Angle
Range: full screen
≤±3%
Circumference
≤±20%
Time/Motion Measurements
Item Error range
Distance
Range: full screen
≤±4%, or <2 mm if measured value is less than 40 mm
Time
Range: full time-axis display
≤±1%
Heart Rate
Range: full time-axis display
≤±5%
Slope
Range: full time-axis display
≤±5%
Volume Measurements
Item Error range
Volume
Range: full screen
≤±12%, or <8000
3
mm
if measured value is less than 64000
3
mm
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