Samsung PT60A User Manual download pdf (Page 45)

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Chapter 1 Safety

 Color Sector Depth

Deeper color sector depth may automatically decrease the color frame rate, or select a new color

focal zone or color pulse length. The TI will change because of the combination of these eects.

Generally, the TI will decrease with the increased color sector depth. The 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 the pulse voltage to stay below the system maximum. A decrease in pulse

voltage will also decrease the MI.

 2D Mode Size

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

increase. The 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

 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 an ancillary element. 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 the Doppler sample volume depth is increased, the Doppler PRF may automatically

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

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

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Samsung PT60A User Manual Page 45