2024 Volume 39 Issue 4 Pages 586-597
Objective: We aimed to clarify how additional filters can lower radiation exposure in gastric X-ray exams by evaluating their impact on low-contrast resolution in fluoroscopic images.
Methods: We assessed two filter configurations: Al 0.5 mm + Cu 0.05 mm and Al 0.5 mm + Cu 0.10 mm. Using phantom fluoroscopic images, we conducted both physical and visual evaluations based on the contrast-to-noise ratio (CNR) and calculated the reduction in radiation dose achieved by these filters.
Results: The use of Al 0.5 mm + Cu 0.05 mm and Al 0.5 mm + Cu 0.10 mm filters resulted in reductions of 20.0-25.8% and 33.9-38.6%, respectively, in the physical assessment. In the visual assessment, reductions of 23.4% and 26.2% were observed, respectively.
Conclusions: By employing additional filters in gastric X-ray fluoroscopic images, we successfully reduced radiation dose without compromising low-contrast resolution.
