Samsung MYSONO U6 Manual do Utilizador Página 181

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5-7
Chapter 5 Measurements and Calculations
Measurement Accuracy Table
The following tables show the accuracy of the measurements that are available when using the
product. Ensure that the results of measurement accuracy checks are kept within the ranges specied
in the tables. Except for certain applications or probes, the following accuracy ranges should be
maintained for measurement of a straight distance.
NOTE: To ensure accurate measurements, an accuracy check should be performed at least once
per year. If the measurement accuracy falls outside the ranges specified in the following table,
contact Samsung Medison’s service department.
2D Mode
Measurements
System Accuracy
(Whichever is greater)
Test
Methodology
Accuracy
Based on
Range
Axial Distance
< ± 4% or 1mm Phantom Acquisition Full Screen
Lateral Distance
< ± 4% or 2mm Phantom Acquisition Full Screen
M Mode
Measurements
System Tolerance
(whichever is greater)
Test
Methodology
Accuracy
Based on
Range
Depth < ± 5% or 3 mm Phantom Acquisition 1 - 25 cm
Time < ± 5% Signal generator Acquisition 0.01 - 11.3 sec
PW/CW Spectral Doppler Mode
Doppler
Measurement
System Tolerance
(whichever is greater)
Test
Methodology
Accuracy
Based on
Range
Velocity < ± 15% Phantom Acquisition
PW:0.1cm/s - 8.8 m/s
CW:0.1cm/s - 19.3 m/s
Time < ± 5% Signal Generator Acquisition 10 ms - 9.44 s
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