The purpose of using a filter in CT scanning is

Question

Quizplus · Accepted Answer

Both planar x-ray and CT imaging systems position an absorbing x-ray filter into the x-ray beam.The beam-modifying filter has two purposes: (1) filtering absorbs the very- low-energy x-rays that would not have sufficient energy to transmit through the body tissue and would thus only increase patient exposure without adding information to the imaging process.By removing the low-energy x-rays, the beam is hardened so that the broad energy distribution has been somewhat removed and the result is a somewhat more uniform average energy of the beam.The filter may reduce patient radiation exposure by as much as 50%.(2) Filtering aids in shaping the energy distribution of the beam used to prevent the edges of the beam from hardening; therefore, the energy distribution across the field of the detectors is more uniform.

The Purpose of Using a Filter in CT Scanning Is