Dual-energy Dual-source Virtual Non-contrast CT Imaging of Laryngeal Carcinoma
10.3969/j.issn.1005-5185.2017.04.002
- VernacularTitle:双源CT双能量虚拟平扫对喉癌的诊断价值
- Author:
Yiren JIN
;
Dong ZHENG
;
Yue JIANG
;
Xia ZHANG
;
Dan HAN
;
Wei ZHAO
- Keywords:
Laryngeal neoplasms;
Tomography,X-ray computed;
Quality control;
Radiation dosage
- From:
Chinese Journal of Medical Imaging
2017;25(4):246-250
- CountryChina
- Language:Chinese
-
Abstract:
Purpose To assess the feasibility of dual-energy dual-source virtual noncontrast (VNC) CT in the diagnosis of laryngeal carcinoma,in order to reduce radiation hazard.Materials and Methods Forty-nine patients with clinically identified laryngeal carcinoma underwent conventional non-contrast (CNC) scan as well as arterial and venous dual-phase and dual-energy VNC scan.The VCN images of arterial and venous phase were obtained by using the dual-energy software.The mean CT value,signal-to-noise ratio (SNR),contrast noise ratio (CNR),lesion morphology,image quality and radiation dose were compared between the VNC and CNC images.Results The mean CT value,SNR,CNR and image quality scores of CNC were higher than those of VNC images of arterial and venous phase (P＜0.05).There was no significant difference in the image quality scores of VNC between the arterial and venous phase (P＞0.05).The image quality scores of VNC were all above 3,which could meet the diagnostic requirements.There was no significant difference in the shape,size,boundary and cystic necrosis of the lesions,invasion of the surrounding space,osteolytic destruction and size of the surrounding lymph node between the CNC and VNC image.The radiation dose of dual-phase dual-energy scan was 0.42 mSv,which was 18.3％ lower than that of the conventional three-phase scan.Conclusion For laryngeal carcinoma,the VNC images from the dual-energy CT scan can be used to reduce the radiation dose without affecting image quality and diagnosis accuracy,which has good clinical value.
