Scatter Radiation

What is scatter radiation?

• Radiation that has been changed in their direction and energy.

• It is one form of primary radiation.

• Radiation that has been absorbed by matter.

Scatter radiation will improve radiographic image quality.

• True

• False

Less scatter radiation is better because image contrast can be improved.

• True

• False

The following are the effect of scatter radiation, EXCEPT:

• Image noise

• Reduce image contrast

• Image more visible

• Radiation hazard to personnel nearby

Scatter radiation to the image can be reduced by:

• reduce kVp

• increase field size

• remove radiographic grid

Increase in kVp will reduce the amount of scatter radiation.

• True

• False

Amount of scattered radiation is proportional to the area or field size being exposed.

• True

• False

Air gap technique helps to reduce scatter radiation and improve image contrast by

• reduce distance between patient and image receptor.

• increase distance between patient and image receptor.

• increase distance between patient and x-ray tube.

Air gap technique increase patient dose due to decrease source-to-object distance (SOD).

• True

• False

Grid is a thin. flat device made by _____________ lead strip and separated ________________ interspace material.

• radiolucent, radiopaque

• radiopaque, radiolucent