title: Effect of Third-generation Dual-source CT Technology on Image Quality of Low-dose Chest CT.
abstract: Objective To evaluate the image quality and radiation dose of third-generation dual-source CT with tin filtration for spectral shaping and iterative reconstructions.Methods Thirty-five patients underwent low-dose CT (LDCT) for lung cancer screening on second-generation dual-source CT and follow-ups on third-generation dual-source CT. Image quality and radiation dose were compared between the two examinations.ResultsThe radiation dose of third-generation dual-source CT [dose-length product (DLP)(49.7±18.2)mGy·cm, effective dose (ED)(0.73±0.26)mSv] was lower than second-generation dual-source CT [DLP (86.37±13.44) mGy·cm, ED(1.20±0.42)mSv](t=6.01, P=0.000;t=6.57, P=0.000). The objective image noise of second-generation dual-source CT [(25.7±2.9)HU] was higher than that of third-generation dual-soure CT[(18.6±4.2)HU](t=5.24,P=0.000).The subjective image noise of second-generation dual-source CT [(4.60±0.49)scores] was significantly lower than that of third-generation dual-source CT [(4.80±0.40)scores] (t=4.15, P=0.000). Conclusion Chest CT for the detection of pulmonary nodules can be performed with third-generation dual-source CT that produces high image quality and low radiation dose when using a stellar infinity detector with spectral shaping.
authors.affiliation: Department of Radiology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Sui
authors.affiliation: Department of Radiology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Xu
authors.affiliation: Department of Radiology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China.
authors.forename: Lan
authors.initials: L
authors.lastname: Song
authors.affiliation: Department of Radiology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China.
authors.forename: Qianni
authors.initials: Q
authors.lastname: DU
authors.affiliation: Department of Radiology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Wang
authors.affiliation: Department of Radiology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China.
authors.forename: Zhengyu
authors.initials: Z
authors.lastname: Jing
authors.affiliation: Department of Radiology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Song
mesh_terms: D055088:Early Detection of Cancer / Q000379:methods*; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D011829:Radiation Dosage; D011857:Radiographic Image Interpretation, Computer-Assisted; D013909:Thorax / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed / Q000379:methods*