Siemens ACUSON Antares, Инструкция по эксплуатации

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6 T e c h n i c a l D e s c r i p t i o n
[ 1 ] I N S T R U C T I O N S F O R U S E
6 - 19
Measurement Range and Accuracy
The following tables describe the variability in accuracy for clinical
measurements.
Clinical Measurements: Range and Accuracy
Direct
Measurement Range
Tolerance
Symbol Tolerance Function or Value (Accuracy)
Distance* 0 – 36 cm Tol(D) 3% of the distance or 1.5mm; whichever is greater
assuming 1540 m/sec speed of sound. Does not
apply to trace tool. Distance tolerance using trace
tool is user-dependent.
Distance using
SieScape extended
field of view
0 – 60 cm Tol(D) Linear transducer: 5% of the distance or 1.5 mm;
whichever is greater assuming 1540 m/sec speed
of sound.
Curved transducer: 8% of the distance or 1.5 mm;
whichever is greater assuming 1540 m/sec speed
of sound.
Trace Area* 0 – 560 cm
2
Tol(A) 6% of the area or 1.5cm
2
; whichever is greater,
assuming minimal operator error in tracing the
desired object and assuming 1540 m/sec speed of
sound.
Time @
Slow Sweep 0 – 9.4 sec Tol(T) @
Slow Sweep 15 msec
Time @
Med Sweep 0 – 4.7 sec Tol(T) @
Med Sweep 7.5 msec
Time @
Fast Sweep 0 – 2.4 sec Tol(T) @
Fast Sweep 3.8 msec
Velocity 10 – 600 cm/sec Tol(V) 10% of the velocity or 5 cm/s; whichever is greater
using a J J & A string phantom at 45 degrees
±1 degree.
* Also applies to
measurements on MPR (slice) quadrants from acquired volumes
.