Theories of Radiation Injury

Question 1

What are the two theories used to describe how radiation damages biologic tissues?

Answer 1

1. The direct theory

2. The indirect theory

Question 2

What is the direct theory?

Answer 2

Suggests that cell damage results when ionizing radiation directly hits critical areas, or targets, within the cell.

Question 3

What is the indirect theory?

Answer 3

Suggests that x-ray photons are absorbed within the cell and cause the formation of toxins, which, in turn, damage the cell.