Samsung SONOACE R3 Bedienungsanleitung PDF herunterladen (Seite 129)

Chapter 5 Measurements and Calculations

5-5

Optimization of Measurement Accuracy

 2D Mode

X

Resolution is in proportion to the frequency of the probe.

X

Penetration is in inverse proportion to the frequency of the probe.

X

The highest resolution can be obtained at the focus of the probe where the ultrasound beam is

narrowest.

X

The most accurate measurements can be obtained at the focus depth. The accuracy decreases

as the distance from the focus increases, widening the beam width.

X

Using the zoom function or minimizing the depth display makes distance or area

measurements more accurate.

 M Mode

X

The accuracy of time measurements can be increased when the sweep velocity and the display

format are set to high values.

X

The accuracy of distance measurements can be increased when the display format is set to

higher values.

 Doppler Mode

X

It is recommended to use lower frequency ultrasound for measurement of faster blood ows.

X

The size of the sample volume is limited by the axial direction of the ultrasound.

X

Using lower frequency ultrasound increases penetration.

X

The accuracy of time measurements can be increased when the sweep velocity is increased.

X

The accuracy of velocity measurements can be increased when the vertical scale is set to

smaller values.

X

It is most important to use an optimal Doppler angle to enhance the accuracy of velocity

measurements.

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Samsung SONOACE R3 Bedienungsanleitung Seite 129