Accuracy Of Measurement - Toshiba Aplio 500 TUS-A500 Operation Manual

23.5 Accuracy of Measurement

Accuracy of Each Clinical Measurement Parameter
Parameter
- Image Depth Scale
- Physio/Image Scales
- Distance/Depth
- Area
- Circumference
- Angle
- Volume
- Velocity
- Time
- Heart Rate
- Accel
- M distance
- Slope
Range of Applicability of the Accuracy Specifications
These measurements will satisfy the accuracies stated above over the entire selected field of
view. The accuracy stated is either the measured value or the calculated value for worst case
conditions.
It should be noted, however, that the above values are not guaranteed for measurements
performed on stored images that use manual calibration or MPR images that have been created
based on data acquired using the 4D transducer. For details of manual calibration, refer to the
operation manual Measurements volume. For details of the 4D transducer, refer to the section
describing the 4D function in the operation manual Applications volume.
Ranges
Up to 400 mm
Up to 10 s
Up to 400 mm
2
Up to 999 cm
Up to 1800 mm
0 to 180 
3
Up to 4200 cm
Up to 2000 cm/s
Up to 10 s
20 to 300 bpm
2
Up to 20000 cm/s
Up to 280 mm
Up to 1000 mm/s
No. 2B771-004EN*M
23-4
Accuracy
<  5% or <1 mm, if below 20 mm
<  3%
<  5% or < 1 mm, if below 20 mm
2
<  10% or < 0.41 cm
, if below 4 cm
<  5% or < 1 mm, if below 20 mm
<  1 
3
<  16% or < 1.3 cm
, if below 8 cm
<  5% of the full scale
<  3% of the full scale
<  3%
<  8%
<  5% or < 1 mm, if below 20 mm
<  8%
2
3
*