Which of the following best describes an additive pathology?

An additive pathology is characterized by conditions that increase the density of tissues. This increased density means that more radiation exposure is required to penetrate the affected tissue during imaging procedures. Examples of additive pathologies include tumors, fluid accumulation, and certain types of infections, which lead to greater mass or changes in tissue composition.

In contrast, decreased tissue density would require less radiation exposure to achieve the same level of imaging contrast, which characterizes a subtractive pathology. Normal tissue density would not necessitate any changes to exposure settings, while random changes in density do not provide a clear, consistent framework for adjusting exposure. Therefore, the description of additive pathology as requiring more exposure due to increased tissue density is accurate and crucial for medical radiation technologists to consider when preparing for imaging studies.