When Using the Mobile C-Arm Unit,the X-Ray Tube Should Be

Multiple Choice

When using the mobile C-Arm unit,the x-ray tube should be positioned under the patient and the image intensifier above the patient because:

A) more convenient to get the unit under the patient's bed during surgery.
B) increase radiation exposure to operator.
C) reduce radiation exposure to operator.
D) it is easier to move this way.