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6.1.2 Optimizing the B Mode Image
Methods of optimizing the B mode image are as follows.
Select the B mode parameter on the menu at the top left of the screen by using the trackball,
press the Set
key to adjust it. Press the Menu key to display/hide this menu.
Select the B mode parameter on the menu at the top left of the screen by using the Select knob,
press Select
knob chage state between "parameter item select state" and "parameter item adjust state", rotate the knob
change parameter item for "parameter item select state" or paramter value for "parameter item adjust state".
Press the Menu key to display/hide this menu.
Figure 6-2 Parameters Adjustment in the B Mode
6.1.2.1 Adjusting the Gain
The B mode gain determines the amplifying factors of the received echoes and the brightness of the ultrasound
image. The echoes are amplified with the same gain value regardless of depth.
Steps:
Rotate the Gain knob clockwise to increase the value.
Rotate the Gain knob anticlockwise to decrease the value.
6.1.2.2 Adjusting the TGC
TGC (Time Gain Compensation) is used to adjust the gain that allows compensation for attenuation
of the
echoes over time (depth).It is adjustable during the real time scan regardless of the imaging
mode and display
format.TGC balances the image so that the density of echoes is the same
throughout the image.
Steps:
● Move the TGC slide pot left to dimmer the B mode image of the corresponding depth.
● Move the TGC slide pot right to brighten the B mode image of the corresponding depth.