If a region of tissue is large and the patient is a child, the relative risk of radiation injury is typically:

Study for the Dental Radiology Foundation Chain and Physics Test. Enhance your skills with flashcards and multiple-choice questions, complete with hints and explanations. Prepare for your success!

Multiple Choice

If a region of tissue is large and the patient is a child, the relative risk of radiation injury is typically:

The key idea is how age and the amount of tissue exposed affect radiation injury risk. In children, developing tissues have many rapidly dividing cells and a larger proportion of stem cells, making them more sensitive to radiation. At the same time, irradiating a larger region exposes more cells to dose, increasing the chance of injury across the area. Because both higher tissue sensitivity and greater irradiated volume raise the likelihood of adverse effects, the relative risk is higher for a child when a large region is involved. This isn’t offset by faster repair to the same extent, and risk isn’t unchanged or determined only by radiation type or age alone.

The key idea is how age and the amount of tissue exposed affect radiation injury risk. In children, developing tissues have many rapidly dividing cells and a larger proportion of stem cells, making them more sensitive to radiation. At the same time, irradiating a larger region exposes more cells to dose, increasing the chance of injury across the area. Because both higher tissue sensitivity and greater irradiated volume raise the likelihood of adverse effects, the relative risk is higher for a child when a large region is involved. This isn’t offset by faster repair to the same extent, and risk isn’t unchanged or determined only by radiation type or age alone.

More practice questions