Abstract:Objective To compare dual-energy virtual non-contrast (VNC) and conventional non-contrast CT enterography using dual-source CT,and investigate the clinical feasibility of VNC. Methods 42 patients received the third-generation dual-source CT
enterography which included conventional non-contrast CT, arterial and venous phase contrast enhanced dual-energy scan (100 kV and sn150 kV). VNC CT images were reformatted by “Liver VNC” software. The mean CT values, noise of normal ileum wall and
erector spinae, signal to noise ratio (SNR) and contrast to noise ratio (CNR) were measured and calculated in the same location. The imaging quality of conventional non-contrast and VNC images were evaluated by 5 grade (0-4 points) standard,and the diagnostic
consistency was compared. The radiation doses were recorded. Results There was no significant difference in mean CT value, SNR, CNR and imaging quality between conventional non-contrast and VNC images (P>0.05). Compared with conventional non-contrast
CT images, all lesions were also detected by VNC CT images. The effective radiation dose of conventional non-contrast, dynamic and venous phase enhanced dual energy CT scanning were (6.23+1.79), (5.35+1.39), (5.33+1.37) mSv respectively. The effective
radiation dose (ED) of conventional non-contrast CT was higher than that of contrast enhanced dual-energy scan in arterial and venous phase (P<0.05), and there was no significant difference between them (P>0.05). Conclusion Dual-source and energy VNC
CT enterography requires less radiation dose and has a potential to replace the conventional non-contrast CT.
贾秀川a,陈英敏a,暴云锋a,柳溪a,王曼a,胡聪聪a,张建b. 双源CT小肠造影双能量虚拟平扫与常规平扫对比研究[J]. 中国医疗设备, 2021, 36(1): 87-89.
JIA Xiuchuana,CHEN Yingmina,BAO Yunfenga,LIU Xia,WANG Mana,HU Congconga,ZHANG Jianb. Comparative Study of Virtual and Conventional Non-Contrast CT Enterography Using Dual-Source and Energy CT. China Medical Devices, 2021, 36(1): 87-89.