Faculty Advisor(s)
Elaine Halesey
Abstract
Computed Tomography (CT) is a critical diagnostic tool that delivers rapid, detailed cross-sectional imaging but remains a major contributor to medical radiation exposure. Increasing use of CT has led to concerns about excessive or low-value exams, including repeat scans that do not often change patient management and may increase long-term cancer risk. Evidence shows that only a small percentage of repeat head CTs reveal clinically significant findings, underscoring the importance of justification and reducing unnecessary imaging. Pediatric patients are particularly vulnerable due to increased tissue radiosensitivity and longer lifespans, making dose optimization essential. National initiatives such as Image Gently and Image Wisely support radiation safety by promoting the As Low As Reasonably Achievable (ALARA) principle, standardized protocols, automatic exposure control, iterative reconstruction, and clinical decision rules such as the Pediatric Emergency Care Applied Research Network (PECARN) guidelines. These evidence-based strategies maintain diagnostic quality while minimizing exposure. This project reviews current research on CT overuse and dose optimization, highlights best practices for reducing cumulative radiation risk, and emphasizes the need for continued education, collaboration, and adherence to evidence-based guidelines. Future work should explore the long-term outcomes of dose-reduction technologies and evaluate strategies to improve provider decision-making regarding CT use.
Publication Date
2025
Document Type
Poster
Department
Medical Imaging
Keywords
computed tomography, radiation dose, ALARA, Image Gently, Image Wisely, dose optimization, PECARN, CT overuse
Disciplines
Medical Specialties | Medicine and Health Sciences | Radiology
Recommended Citation
Minnick, Helen, "Radiation Dose in Computed Tomography (CT)" (2025). Medical Imaging Senior Posters. 57.
https://digitalcommons.misericordia.edu/medimg_seniorposters/57