Image quality of ct angiography using model-based iterative reconstruction in infants with congenital heart disease: Comparison with filtered back projection.

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Image quality of ct angiography using model-based iterative reconstruction in infants with congenital heart disease: Comparison with filtered back projection and hybrid iterative reconstruction Qianjun Jia, MD, Jian Zhuang, MD, PHD, Jun Jiang, MD, Jiahua Li, MD, Meiping Huang, MD, Changhong Liang, MD, PHD European Journal of Radiology Volume 86, Pages 190-197 (January 2017) DOI: 10.1016/j.ejrad.2016.10.017 Copyright © 2016 Terms and Conditions

Fig. 1 A five-month-old boy with a ventricular septal defect and a dilated pulmonary artery. A 256-slice multi-detector computed tomography (MDCT) angiography scan was performed at 80kV and 30mAs/rotation (effective radiation dose=0.62mSv). Axial images reconstructed using the filtered back projection (FBP) (A), iDose4 (B) and iterative model reconstruction (IMR) (C) algorithms are shown. The IMR algorithm yielded substantially reduced image noise and increased image quality compared with the FBP and iDose4 algorithms. European Journal of Radiology 2017 86, 190-197DOI: (10.1016/j.ejrad.2016.10.017) Copyright © 2016 Terms and Conditions

Fig. 2 The same patient as shown in Fig. 1. Multi-planar reformatted (MPR) images of the left anterior descending (LAD) coronary artery reconstructed using the filtered back projection (FBP) (A), iDose4 (B) and iterative model reconstruction (IMR) (C) algorithms are shown. Images reconstructed using the IMR algorithm (C) showed lower image noise than did those reconstructed with the FBP (A) and iDose4 algorithms (B). IMR showed the left main (LM) coronary artery and the proximal segment of the LAD more clearly than did the FBP and iDose4 algorithms (arrow). However, IMR showed the middle segment of the LAD less clearly than did FBP and iDose4 (arrow head). European Journal of Radiology 2017 86, 190-197DOI: (10.1016/j.ejrad.2016.10.017) Copyright © 2016 Terms and Conditions

Fig. 3 A one-month-old boy with transposition of the great arteries, a double-outlet right ventricle and patent ductus arteriosus (PDA). A 256-slice multi-detector computed tomography (MDCT) angiography scan was performed at 80kV and 20mAs/rotation (effective radiation dose=0.40mSv). Sagittal multi-planar reformatted (MPR) images reconstructed using the filtered back projection (FBP) (A), iDose4 (B) and iterative model reconstruction (IMR) (C) algorithms are shown. FBP and iDose4 clearly showed the small PDA (arrow). However, the lesion was blurred on the MPR image processed using the IMR algorithm. European Journal of Radiology 2017 86, 190-197DOI: (10.1016/j.ejrad.2016.10.017) Copyright © 2016 Terms and Conditions