MediSono P25 EXP, User Manual

Page: 102 / 214

6 Acquiring Images
90 Basic User Manual
Frequency
Frequency optimizes the penetrability and the sensitivity of the color flow.
To adjust the frequency:
●
Tap the left part of Frequency on the touch screen to decrease the value.
●
Tap the right part of Frequency on the touch screen to increase the value.
Wall Filter
Wall filter is used to filter the low frequency noise from tissues, such as the vascular wall.
To adjust the wall filter:
●
Tap the left part of WF on the touch screen to decrease the value.
●
Tap the right part of WF on the touch screen to increase the value.
Pulse Repetition Frequency
Pulse repetition frequency is used to adjust the velocity scale.
To adjust the pulse repetition frequency:
●
Tap the left part of PRF on the touch screen to decrease the value.
●
Tap the right part of PRF on the touch screen to increase the value.
Line Density
Line density refers to the amount of ultrasound beam that makes up the image. Increasing
the value of line density improves the resolution and decreases frame rate. Therefore, you
have to balance the frame rate and the image quality when adjusting the line density.
A lower line density is useful in fetal heart beat, adult cardiac applications and in clinical
radiology applications. A higher line density is useful in obtaining a very high resolution,
such as for the thyroid or testicles.
To adjust the line density:
●
Tap the left part of Line Density on the touch screen to decrease the value.
●
Tap the right part of Line Density on the touch screen to increase the value.
Baseline
Baseline represents the position of zero velocity or frequency. The velocity range in one
direction can be increased or decreased by adjusting the baseline.
Baseline is used to eliminate the alias in the color flow imaging, and display higher
velocities without reversal of colors.
To adjust the baseline: