Samsung HS50 Manual do Utilizador descarregar pdf (Página 149)

8-5

Chapter 8 Measurements and Calculations

Optimization of Measurement Accuracy

 2D Mode

X

Resolution is in proportion to the frequency of the probe.

X

Penetration is inversely proportional 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. As the distance from the

focus increases, the beam width increases, which results in lower accuracy.

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 by setting the sweep velocity and the

display format to higher values.

X

The accuracy of distance measurements can be increased by setting the display format to a

higher value.

 Doppler Mode

X

Using lower frequency ultrasound is recommended 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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OSCAR 23 Apr 2025 | 08:21:36

Samsung HS50 Manual do Utilizador Página 149