24-1
24 Measurement Accuracy
Table 1 Error of Two-Dimensional Images
Parameter Value range error
Depth / Distance Maximum 300 mm
Within + / - 3%; or when the measured value is
less than 40 mm, the error is less than1.5 mm.
Area (Trace) Maximum 1126 cm
2
Within + / - 7%; or when the measured value is
less than 16 cm
2
, the error is less than 1.2 cm
2
Area (ellipse, circle) Maximum 884cm
2
Within + / - 7%; or when the measured value is
less than 16 cm
2
, the error is less than 1.2 cm
2
Angle 0~180° Within + / - 3%
% Stenosis Maximum 1.0 Within + / - 7%
Volume Maximum 999cm
3
Within + / -10 %; or when the measured value is
less than 64 cm
3
, the error is less than 6.4 cm
3
Table 2 Time / Motion Measurements
Parameter Value range Error
Distance Maximum 300mm
Within + / - 3 %; or when the measured value
is less than 40mm, the error is less than
1.5mm
Time Maximum 8s Within + / - 1%
Heart rate 15~999 beats per minute Within + / - 4%
Slope (M mode) Maximum 999mm / s Within + / - 4%
Table 3 Doppler Speed Measurement
Parameter Range error
Speed (PW mode) 20~250cm/s Within + / - 5%
Speed (CW mode) 20~300cm/s Within + / - 9%
Table 4 iScape Measurement
Parameter Value Range Error
Distance / Within + / - 5%
NOTE:
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, regardless of acoustic speed
error.
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