Samsung SONOACE R3 Manuel d'utilisateur télécharger pdf (Page 43)

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101

Chapter 1 Safety

1-25

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Color Sector Depth

Deeper color sector depth may automatically decrease color frame rate or select a new color focal zone

or color pulse length. The TI will change due to the combination of these eects. Generally, the TI will

decrease with increased color sector depth. MI will correspond to the peak intensity of the dominant

pulse type, which is a color pulse. However, if pulsed Doppler is also enabled then pulsed Doppler will

remain the dominant mode and the TI change will be small.

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Scale

Using the SCALE control to increase the color velocity range may increase the TI. The system will

automatically adjust pulse voltage to stay below the system maximums. A decrease in pulse voltage will

also decrease MI.

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Sec Width

A narrower 2D-mode sector width in Color imaging will increase color frame rate. The TI will increase. MI

will not change. If pulsed Doppler is also enabled, then pulsed Doppler will remain as the primary mode

and the TI change will be small.

M-mode and Doppler Controls

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Speed

M-mode and Doppler sweep speed adjustments will not affect the MI. When M-mode sweep speed

changes, TI changes.

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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 largest 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.

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Samsung SONOACE R3 Manuel d'utilisateur Page 43

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