Part II General Information
Function and Performance Check 231
6.5.2.3 Maximum detection depth
Note:
An overlarge gain may result in large noise and submergence of the echo signal.
For linear array probe, the probe surface should be perfectly fit with the acoustic
window on the phantom without any inclination during scan.
For convex and phased probe, make sure the axial target group is placed in the central
of the scanning plane which keeps the justice of the interfering effect.
In non-freeze mode, a distant target may be similar to a noise dot which should be
discarded.
Test procedure:
1. Place the probe gently on the phantom surface which is covered by water or medical ultrasonic
couplant.
2. Set displaying depth (according to the max depth of the current probe);
3. Adjust the Focus to the deepest, set AP value to largest.
4. Increase Gain, Contrast, TGC, but make sure that no halos or defocusing appears.
5. Record the depth of the most distant target line which is imaged clearly.
Image effect is show in the figure below:
To Next Page
Loading...
Need help?
General
