Samsung PT60A User Manual download pdf (Page 42)

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User Manual

In combined modes, such as simultaneous Color, 2D-mode, and pulsed Doppler, the individual

modes each add to the total TI. Each mode is a vital contributor to this total; the displayed MI will

be from the mode with the largest peak pressure.

 2D Mode Controls

 2D Mode Size

Narrowing the sector angle may increase the frame rate. This will increase the TI. The pulse voltage

may be automatically adjusted down by the software controls to keep the TI below the system

maximum. A decrease in pulse voltage will decrease MI.

 Focus

Changing the focal depth will change the MI. Generally, higher MI values will occur when the focal

depth is near the natural focus of the probe (transducer).

 Color and Power Controls

 Color Sensitivity

Increasing the color sensitivity increases the TI and the time spent to scan color images. Color

pulses are the dominant pulse type in this mode.

 Color Sector Width

Narrower color sector width will increase the color frame rate, and so the TI will increase. The

system may automatically decrease the pulse voltage to stay below the system maximum. A

decrease in pulse voltage will decrease the MI. If pulsed Doppler is also enabled, then pulsed

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

 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.

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Samsung PT60A User Manual Page 42