Mindray M7 - Measurement Accuracy

Measurement 9-5
9.4 Measurement Accuracy
Table 1 Error of 2D Images
Parameter Value Range Error
Distance Full screen
Within ±3%; or when the measured value is
less than 40 mm, the error is less than1.5 mm.
Area (Trace) Full screen
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)
Full screen
Within ±7%; or when the measured value is
less than 16 cm
2
, the error is less than 1.2 cm
2
.
Angle Full screen Within ±3%.
Table 2 Volume Measurements
Parameter
Value
Range
Error
Volume Full screen
Within ±10 %; or when the measured value is less than 64 cm
3
,
the error is less than 6.4 cm
3
.
Table 3 Time/Motion Measurements
Parameter Value Range Error
Distance Full screen
Within ±3 %; or when the measured value is
less than 40mm, the error is less than 1.5mm.
Time Timeline Display Within ±2%.
Heart rate Timeline Display Within ±4%.
Table 4 Doppler Velocity Measurements
Parameter Value Range Error
Velocity (PW mode) Maximum ≥2.5m/s When angle≤60º, ≤5%.
Velocity (CW mode) Maximum ≥2.5m/s When angle≤60º, ≤5%.
The above measurements are not applicable for the pencil probe (CW2s).
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.