Ji Won Lee1, Geewon Lee, Nam Kyung Lee, Jin Il Moon, Yun Hye Ju, Young Ju Suh, Yeon Joo Jeong. 1. From the *Department of Radiology, Pusan National University Hospital, Pusan National University School of Medicine and Medical Research Institute, Busan; †Department of Biomedical Engineering, Yonsei University, Wonju; and ‡Department of Biomedical Sciences, School of Medicine, Inha University, Incheon, Republic of Korea.
Abstract
OBJECTIVE: The aim of the study was to assess the effectiveness of the adaptive statistical iterative reconstruction (ASIR) for dual-energy computed tomography pulmonary angiography (DE-CTPA) with a reduced iodine load. MATERIALS AND METHODS: One hundred forty patients referred for chest CT were randomly divided into a DE-CTPA group with a reduced iodine load or a standard CTPA group. Quantitative and qualitative image qualities of virtual monochromatic spectral (VMS) images with filtered back projection (VMS-FBP) and those with 50% ASIR (VMS-ASIR) in the DE-CTPA group were compared. Image qualities of VMS-ASIR images in the DE-CTPA group and ASIR images in the standard CTPA group were also compared. RESULTS: All quantitative and qualitative indices, except attenuation value of pulmonary artery in the VMS-ASIR subgroup, were superior to those in the VMS-FBP subgroup (all P < 0.001). Noise and signal-to-noise ratio of VMS-ASIR images were superior to those of ASIR images in the standard CTPA group (P < 0.001 and P = 0.007, respectively). Regarding qualitative indices, noise was significantly lower in VMS-ASIR images of the DE-CTPA group than in ASIR images of the standard CTPA group (P = 0.001). CONCLUSIONS: The ASIR technique tends to improve the image quality of VMS imaging. Dual-energy computed tomography pulmonary angiography with ASIR can reduce contrast medium volume and produce images of comparable quality with those of standard CTPA.
RCT Entities:
OBJECTIVE: The aim of the study was to assess the effectiveness of the adaptive statistical iterative reconstruction (ASIR) for dual-energy computed tomography pulmonary angiography (DE-CTPA) with a reduced iodine load. MATERIALS AND METHODS: One hundred forty patients referred for chest CT were randomly divided into a DE-CTPA group with a reduced iodine load or a standard CTPA group. Quantitative and qualitative image qualities of virtual monochromatic spectral (VMS) images with filtered back projection (VMS-FBP) and those with 50% ASIR (VMS-ASIR) in the DE-CTPA group were compared. Image qualities of VMS-ASIR images in the DE-CTPA group and ASIR images in the standard CTPA group were also compared. RESULTS: All quantitative and qualitative indices, except attenuation value of pulmonary artery in the VMS-ASIR subgroup, were superior to those in the VMS-FBP subgroup (all P < 0.001). Noise and signal-to-noise ratio of VMS-ASIR images were superior to those of ASIR images in the standard CTPA group (P < 0.001 and P = 0.007, respectively). Regarding qualitative indices, noise was significantly lower in VMS-ASIR images of the DE-CTPA group than in ASIR images of the standard CTPA group (P = 0.001). CONCLUSIONS: The ASIR technique tends to improve the image quality of VMS imaging. Dual-energy computed tomography pulmonary angiography with ASIR can reduce contrast medium volume and produce images of comparable quality with those of standard CTPA.
Authors: Derek S Tsang; Thomas E Merchant; Sophie E Merchant; Hanna Smith; Yoad Yagil; Chia-Ho Hua Journal: Br J Radiol Date: 2017-07-27 Impact factor: 3.039
Authors: Doris Leithner; Tatjana Gruber-Rouh; Martin Beeres; Julian L Wichmann; Scherwin Mahmoudi; Simon S Martin; Lukas Lenga; Moritz H Albrecht; Christian Booz; Thomas J Vogl; Jan-Erik Scholtz Journal: Br J Radiol Date: 2018-06-05 Impact factor: 3.039
Authors: Moritz Kaup; Tatjana Gruber-Rouh; Jan E Scholtz; Moritz H Albrecht; Andreas Bucher; Claudia Frellesen; Thomas J Vogl; Martin Beeres Journal: Acta Radiol Open Date: 2016-12-01