Question

disadvantages of ultrasound scanner

Answer 1

the disadvantages of ultrasound scanner are
1.it is heavily operator-dependent
2.review of images provides only limited quality control

Answer 2

1. Frequent calibration with test pieces.
2. Echoes can be misinterpreted.
3. Depends on the skill of operator.
4. limitation of equipment due various  Depth of the defects
5. Probe has to make positive contact with the object