Teste | Abstract: 108-1 | ||||
Abstract:In medical imaging utilizing ionizing radiation, achieving an optimal balance between image quality and irradiation dose is essential to ensure both diagnostic accuracy and patient safety [1]. This study investigates the relationship between radiographic image quality and patient irradiation dose across three primary radiographic techniques: tube potential (kVp), current-time product (mAs), and additional filtration. To assess these dependencies the contrast-detail CDRAD 2.0 phantom and the CDRAD Analyser (Artinis Medical System, The Netherlands) were utilized. Image quality was evaluated at varying depths within an acrylic simulator, with voltage settings ranging from 60 to 85 kVp, current from 0.5 to 10 mAs, and copper filters of 0.1 and 0.3 mm. The system configuration and technical parameters used in the study were identical to those used in patient examinations. Our findings reveal a distinct difference in the behavior of image quality and irradiation dose in response to variations in mAs and kVp. Specifically, for the detection system studied, increasing kVp to enhance image quality results in a significantly lower irradiation dose compared to increasing mAs. This outcome is consistent regardless of the depth of the visualized object within the acrylic simulator. These insights underscore the importance of optimizing radiographic techniques to achieve superior image quality while minimizing patient exposure, thereby enhancing the overall efficacy and safety of X-ray digital radiography. Keywords: image quality, digital radiography, CDRAD |