What are the primary interactions of light with tissue?

The primary interactions of light with tissue encompass several key processes that dictate how light behaves when it encounters biological materials. The correct choice highlights reflection, scattering, transmission, and absorption as fundamental interactions.

Reflection occurs when light bounces off the surface of the tissue, which is significant in procedures where surface characteristics impact how light is utilized. Scattering refers to the redirection of light in various directions as it passes through or reflects off cellular structures; this is critical for imaging and treatment applications where the distribution of light within tissue is important. Transmission involves light passing through the tissue, which can be vital for therapies that rely on light penetrating deeper layers. Absorption is the process where light energy is taken up by the tissue, resulting in thermal effects or biochemical changes, which is central to the efficacy of many laser treatments.

These interactions are fundamental to understanding how lasers can be effectively used in medical and aesthetic applications. The other options do not encompass the complete set of primary interactions relevant to light and tissue, as they either include terms that are not main interactions or fail to capture the essential processes that influence laser-tissue interactions. Therefore, the correct choice effectively summarizes the main ways in which light interacts with biological tissues.