Which statement describes a result of using the air gap technique?

Which statement describes a result of using the air gap technique?

• A. A higher dose to the patient
• B. A lower dose to the patient
• C. A reduction in scatter radiation
• D. An increase in scatter radiation

Answer: (C)

Air gap technique increases the distance between the patient and the image receptor, which reduces the number of scatter photons that can reach the receptor. Scatter radiation adds fog and lowers image contrast, so removing or limiting those photons improves the visibility of details. The primary result described is a reduction in scatter radiation reaching the image receptor, leading to better image contrast. A trade-off is that the increased distance can magnify the image and reduce sharpness, and dose adjustments may be needed to maintain appropriate image density. This technique is not about increasing patient dose; its main effect is scatter reduction (and the associated contrast improvement).

Air gap technique increases the distance between the patient and the image receptor, which reduces the number of scatter photons that can reach the receptor. Scatter radiation adds fog and lowers image contrast, so removing or limiting those photons improves the visibility of details. The primary result described is a reduction in scatter radiation reaching the image receptor, leading to better image contrast. A trade-off is that the increased distance can magnify the image and reduce sharpness, and dose adjustments may be needed to maintain appropriate image density. This technique is not about increasing patient dose; its main effect is scatter reduction (and the associated contrast improvement).