The phantom study of the potential of radiation dose reduction using adaptive iterative dose reduction algorithm
1.Department of Medical Engineer, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325015; 2.Department of Radiology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325015; 3.School of Information and Engineering, Wenzhou Medical University, Wenzhou, 325035
MIAO Miao1,CAO Guoquan2,TAI Yunpeng2, et al. The phantom study of the potential of radiation dose reduction using adaptive iterative dose reduction algorithm[J]. JOURNAL OF WEZHOU MEDICAL UNIVERSITY, 2015, 45(11): 845-.
Abstract：Objective: To study the ability of the reconstruction algorithm of adaptive iterative dose reduction 3D to reduce the radiation dose of CT scanning, under the prernise in image quality undamaged. Methods: A 320-detector CT with volume mode was used to scan the low contrast module CTP515 and the high resolution module CTP528 of the phantom Catphan 500, while seven different tube currents 50, 80, 150, 250, 350, 450, and 550 mA were adopted respectively. CT images were reconstructed using the reconstruction algorithm of Filtered Back Projection and AIDR 3D in three degrees: mild, standard and strong. The noise, contrast-noise ratio, signal-noise ratio and spatial resolution of the images were used to evaluate the quality of the output image yielded by different tube-current/reconstruction-algorithm choices. Results: Using the algorithm of AIDR 3D to reconstruct CT image can significantly reduce image noise and increase contrast-noise ratio and signal-noise ratio with the spatial resolution undamaged. In the best case, the proportion of the radiation could be reduced by 78.41%. Conclusion: The reconstruction algorithm of AIDR 3D has remarkable ability to reduce the radiation dose of CT scanning. Different iteration degrees resultes in different level of reduction.
