190 Chapter 8: References
References
Diagonal Distance < ±2% plus 1% of
full scale
Acquisition Phantom 0-44 cm
Area
d
< ±4% plus (2% of
full scale/smallest
dimension) * 100
plus 0.5%
Acquisition Phantom
0.01-720 cm
2
Circumference
e
< ±3% plus (1.4%
of full scale/
smallest
dimension) * 100
plus 0.5%
Acquisition Phantom 0.01-96 cm
a. Full scale for distance implies the maximum depth of the image.
b. An RMI 413a model phantom with 0.7 dB/cm MHz attenuation was used.
c. Based upon C15 imaging at maximum depth with calipers in rectangular imaging area.
d. The area accuracy is defined using the following equation:
% tolerance = ((1 + lateral error) * (1 + axial error) – 1) * 100 + 0.5%.
e. The circumference accuracy is defined as the greater of the lateral or axial accuracy and by the following
equation:
% tolerance = ( (maximum of 2 errors) * 100) + 0.5%.
Table 1: 2D Measurement Accuracy and Range (Continued)
2D Measure Accuracy
and Range
System
Tolerance
a
Accuracy
By
Test
Method
b
Range (cm)
c
2
Table 2: M Mode Measurement and Calculation Accuracy and Range
M Mode Measurement
Accuracy and Range
System
Tol erance
Accuracy
By
Test
Method
Range
Distance < +/- 2% plus 1%
of full scale
a
Acquisition
Phantom
b
0-26 cm
Time < +/- 2% plus 1%
of full scale
c
Acquisition
Phantom
d
0.01-10 sec
Heart Rate < +/- 2% plus (Full
Scale
c
* Heart
Rate/100) %
Acquisition
Phantom
d
5-923 bpm
a. Full scale for distance implies the maximum depth of the image.
b. An RMI 413a model phantom with 0.7 dB/cm MHz attenuation was used.
c. Full scale for time implies the total time displayed on the scrolling graphic image.
d. SonoSite special test equipment was used.
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