When imaging a pediatric patient, how should collimation be adjusted relative to adult patients?

When imaging a pediatric patient, how should collimation be adjusted relative to adult patients?

• A. Collimation should be increased because pediatric patients are smaller.
• B. Collimation should be decreased because children are smaller.
• C. There is no change to collimation.
• D. Collimation should be increased only for large fields.

Answer: (A)

Tighten the beam to the smallest field that still covers the region of interest. Because pediatric patients are smaller and their tissues are more radiosensitive, reducing the exposure area minimizes dose to surrounding tissues, lowers scatter, and can improve image contrast. Always ensure the field is large enough to include the entire area of diagnostic interest with a small safety margin to avoid clipping essential anatomy. This approach follows ALARA by focusing the exposure where it’s needed and avoiding radiation to unneeded areas.

Tighten the beam to the smallest field that still covers the region of interest. Because pediatric patients are smaller and their tissues are more radiosensitive, reducing the exposure area minimizes dose to surrounding tissues, lowers scatter, and can improve image contrast. Always ensure the field is large enough to include the entire area of diagnostic interest with a small safety margin to avoid clipping essential anatomy. This approach follows ALARA by focusing the exposure where it’s needed and avoiding radiation to unneeded areas.