A "B" reader is a physician specifically certified by the National Institute for Occupational Safety and Health (NIOSH) to evaluate X-rays for signs of respiratory diseases like pneumoconiosis. Established in the 1970s to improve the consistency of medical findings, the program requires doctors to pass a rigorous exam and renew their credentials every four years. These specialists play a vital role in epidemiological research, worker monitoring, and providing expert testimony in legal cases involving toxic exposure. To maintain scientific integrity, practitioners must adhere to a strict code of ethics designed to minimize bias and ensure objective reporting. Despite these standards, the profession faces challenges regarding inter-reader v ...