When positioning a patient with an extreme hypersthenic body habitus for a radiographic procedure, what is a crucial consideration for minimizing radiation exposure?

• A. Decreasing the collimation to expand the field of exposure
• B. Using a longer exposure time to reduce dose
• C. Increasing the collimation to include only the area of interest
• D. Using a higher kVp to minimize dose

Answer: (C)

Limiting the radiation field is the most effective way to minimize dose. In an extreme hypersthenic patient, the body is wide, so irradiating a larger area would expose more tissue and produce more scatter. By increasing collimation to include only the area of interest, you restrict the beam to exactly what’s needed, reducing the total tissue exposed and the scatter reaching the image receptor. This lowers patient dose while preserving or improving image quality.

Expanding the field would raise dose; extending exposure time increases dose; and while adjusting kVp can influence dose, it isn’t as reliable or direct a method for dose reduction as tightening the field to the essential area.