Development and Evaluation of a Standardized Protocol for Pediatric Chest Radiography

Thesis Abstract

Pediatric chest radiography is a critical diagnostic tool in pediatric healthcare, yet the variability in image quality and radiation exposure owing to inconsistent imaging protocols poses significant challenges to accurate diagnosis and patient safety. Variations in technique often result in repeats, increased radiation doses, and suboptimal diagnostic information, thereby emphasizing the need for a standardized protocol tailored specifically for pediatric patients. This study aims to develop, implement, and evaluate a comprehensive standardized protocol for pediatric chest radiography to enhance image quality, reduce patient radiation exposure, and improve diagnostic outcomes. The specific objectives include identifying current practice variations, designing a protocol grounded in radiographic best practices and pediatric radiology guidelines, training radiographers on the new protocol, and evaluating its effectiveness through quantitative and qualitative measures. The research employs a mixed-methods sequential explanatory design, integrating quantitative assessments with qualitative insights. The primary population comprises 150 pediatric radiography cases from two major hospitals over a six-month period, along with a stratified sample of 30 radiographers working in pediatric radiology departments. Purposive sampling was used to select cases and practitioners involved in pediatric radiography, ensuring representation across different age groups and experience levels. Data collection instruments include structured observation checklists, image quality assessment scales (e.g., the European Quality Criteria for Pediatric Chest Radiographs), radiographer questionnaires, and semi-structured interviews. Content validity of the instruments was established via expert review, while reliability was determined through pilot testing with Cronbach’s alpha coefficients exceeding 0.80. Data analysis involves descriptive statistics for baseline practice assessment, paired t-tests to compare pre- and post-implementation image quality scores, and multiple regression analysis to identify predictors of radiographic quality and radiation dose reduction. Qualitative data from interviews are analyzed thematically to contextualize quantitative findings. Key findings are expected to demonstrate significant improvements in image quality scores and reductions in patient radiation doses following protocol implementation. It is hypothesized that adherence to the standardized protocol will correlate strongly with higher image interpretability and lower repeat rates. The study also anticipates identifying key barriers and facilitators to protocol adoption through radiographer feedback, informing targeted training interventions. The contribution to knowledge includes providing an empirically validated, context-specific pediatric chest radiography protocol that can serve as a benchmark for radiologic practice in similar settings. Additionally, the study advances understanding of the relationship between standardized procedures and clinical outcomes in pediatric radiology, anchored in theories of quality improvement and change management, specifically Lewin’s Change Theory and Donabedian’s Structure-Process-Outcome framework. This research offers a practical intervention to optimize pediatric radiographic practice, with potential to influence policy and standard care procedures at departmental and institutional levels. The findings will guide radiography departments worldwide in implementing evidence-based protocols tailored for children, emphasizing the balance of diagnostic efficacy and radiation safety. Recommendations include integrating the protocol into routine clinical practice, establishing continuous quality assurance processes, and conducting further longitudinal studies to assess long-term benefits. The study concludes that a structured, evidence-based pediatric chest radiography protocol is feasible, sustainable, and impactful in improving pediatric diagnostic imaging, ultimately contributing to safer and more accurate pediatric healthcare diagnostics.