Samsung MYSONO U6 Manual do Utilizador descarregar pdf (Página 43)

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Chapter 1 Safety

 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.

 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.

 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

 Speed

M-mode and Doppler sweep speed adjustments will not aect the MI. When M-mode sweep speed

changes, TI changes.

 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.

 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 MYSONO U6 Manual do Utilizador Página 43