Samsung PT60A User Manual download pdf (Page 43)

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Chapter 1 Safety

 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.

 Other

 2D, Color, M, Doppler Modes (2D, Color, M mode, PW)

When a new imaging mode is selected, both the TI and the MI will revert to their 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 the MI is the value for the focal zone of the mode with the largest de-rated intensity. If a mode

is turned o and then reselected, the system will return to the previously selected settings.

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Samsung PT60A User Manual Page 43