Samsung MySono U5 Bedienungsanleitung PDF herunterladen (Seite 43)

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Chapter 1 Safety

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Simultaneous and Update Methods

Use of combination modes aects both the TI and MI through the combination of pulse types.

During simultaneous mode, the TI is additive. During auto-update and duplex, the TI will display

the dominant pulse type. The displayed MI will be from the mode with the greatest peak pressure.

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Sample Volume Depth

When Doppler sample volume depth is increased the Doppler PRF may automatically decrease. A

decrease in PRF will decrease the TI. The system may also automatically decrease the pulse voltage

to remain below the system maximum. A decrease in pulse voltage will decrease MI.

Doppler, CW, M Mode, and Color Imaging Controls

When a new imaging mode is selected, both the TI and the MI will change to default settings. Each

mode has a corresponding pulse repetition frequency and maximum intensity point. In combined

or simultaneous modes, the TI is the sum of the contribution from the modes enabled and MI is the

MI for the focal zone and mode with the greatest derated intensity. If a mode is turned o and then

reselected, the system will return to the previously selected settings.

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Probe

Each available probe model has unique specications for contact area, beam shape, and center

frequency. Defaults are initialized when you select a probe. Samsung Medison factory defaults vary

with probe, application, and selected mode. Defaults have been chosen below the FDA limits for

intended use.

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Depth

An increase in 2D mode depth will automatically decrease the 2D mode frame rate. This would

decrease the TI. The system may also automatically choose a deeper 2D mode focal depth. A change

of focal depth may change the MI. The MI displayed is that of the zone with the greatest peak intensity.

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Application

Acoustic output defaults are set when you select an application. Samsung Medison factory defaults

vary with probe, application, and mode. Defaults have been chosen below the FDA limits for

intended use.

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Samsung MySono U5 Bedienungsanleitung Seite 43