Radiation Dose Optimization and Parameter Trends in Digital Radiography: A Two-Period Comparative Analysis

Parameter Trends in Digital Radiography

Abstract

Purpose: This study aims to evaluate the temporal evolution of radiographic parameter preferences and radiation dose awareness among radiology technicians in Turkey, focusing on the transition within digital radiography and the implementation of dose optimization (ALARA) principles for adult and pediatric patients.

Methodology: A cross-sectional comparative study was conducted across two distinct periods (Period 1: N: 280, Period 2: N: 127). Data were collected via a structured online survey assessing technical parameter selections (kVp, mAs, and SID) for supine abdominal (KUB) and chest radiographs. Responses were categorized as low (0), optimal (1), or high (2) based on international diagnostic reference levels. Statistical significance was determined using the Pearson chi-square test (p < 0.05).

Findings: Significant shifts were observed in the participants' educational backgrounds (p=0.020) and professional experience (p=0.036). A marked improvement was identified in mAs optimization for adult KUB radiographs, with optimal selection rising from 0% to 29% (p < 0.001). Correct SID usage also increased significantly for adult chest (24% to 38%, p=0.019) and pediatric chest radiographs (13% to 28%, p < 0.001). Conversely, pediatric KUB dose optimization worsened; optimal dose selection decreased from 27% to 15%, while high-dose preferences rose to 52% (p = 0.035). Conclusions: While the findings indicate a positive trend in technical parameters like mAs and SID, pediatric radiation dose management remains a critical concern. The results highlight a persistent "education-practice gap," emphasising the urgent need for targeted pediatric radioprotection training and standardized clinical protocols to ensure effective dose optimization.