Samsung MySono U5 Manual de usuario descargar pdf (Pagina 165)

100

101

Chapter 5 Measurements and Calculations

5-5

Optimizing Measurement Accuracy

2D Mode

X Resolution is proportional to the frequency of the probe.

X Penetration is inversely proportional to the frequency of the probe.

X Resolution is at its highest when the narrowest ultrasound beam is used at the probe’s focal point.

X Measurements are most accurate at the set focal depth. The further it gets from the focal point,

the less accurate the measurements become, as the beam width increases.

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 MySono U5 Manual de usuario Pagina 165

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