Radiation Physics and Safety in Fluoroscopy: A Clinician's Guide to Principles and Practice

Fluoroscopic venography serves as a pivotal diagnostic and interventional modality in the assessment and management of venous disorders, including deep vein thrombosis, venous occlusion or malformations, and stent placement. The technique's real-time imaging capabilities facilitate precise visualization of venous anatomy and pathology, thereby guiding therapeutic interventions. However, the utilization of ionizing radiation inherent in fluoroscopy introduces potential risks to both patients and healthcare personnel. These risks encompass deterministic effects, such as skin erythema and cataract formation, and stochastic effects, including an increased likelihood of malignancy, particularly with cumulative exposure. Despite the critical importance of radiation safety, many clinicians involved in fluoroscopic procedures lack comprehensive training in radiation physics and protective measures. This knowledge gap can lead to suboptimal practices, resulting in unnecessary radiation exposure and associated health risks. A thorough understanding of the fundamental principles of radiation physics, including the mechanisms of X-ray production, interactions with human tissue, and the quantification of radiation dose, is essential for optimizing patient care and ensuring occupational safety. This review article aims to bridge the gap between theoretical radiation physics and its practical application in clinical settings. By elucidating the core concepts of radiation interactions, dose measurement, and safety protocols, we seek to empower clinicians with the knowledge necessary to minimize radiation exposure while maintaining diagnostic efficacy. Emphasis is placed on the implementation of the ALARA (As Low As Reasonably Achievable) principle, adherence to established dose limits, and the adoption of evidence-based strategies to mitigate radiation risks. Enhancing radiation literacy among clinicians is paramount in the era of advanced imaging. By integrating foundational physics with clinical practice, healthcare providers can make informed decisions that prioritize both patient outcomes and occupational health.