Effect of Third-generation Dual-source CT Technology on Image Quality of Low-dose Chest CT.
10.3881/j.issn.1000-503X.2017.01.004
- Author:
Xin SUI
1
;
Xiaoli XU
1
;
Lan SONG
1
;
Qianni DU
1
;
Xiao WANG
1
;
Zhengyu JING
1
;
Wei SONG
1
Author Information
1. Department of Radiology, PUMC Hospital, CAMS and PUMC, Beijing 100730, China.
- Publication Type:Journal Article
- MeSH:
Early Detection of Cancer;
methods;
Humans;
Lung Neoplasms;
diagnostic imaging;
Radiation Dosage;
Radiographic Image Interpretation, Computer-Assisted;
Thorax;
diagnostic imaging;
Tomography, X-Ray Computed;
methods
- From:
Acta Academiae Medicinae Sinicae
2017;39(1):17-20
- CountryChina
- Language:English
-
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.
