Abstract：Objective To compare the image quality of dual-energy virtual non-contrast-enhanced (VNC) and true noncontrastenhanced
CT image (TNC) of the upper abdomen, and explore the feasibility of VNC instead of TNC. Methods Dual-energy CT
was used to perform contrast-enhanced scans of upper abdomen in 37 patients, in which the plain scan was in single-energy mode,
and dual-energy mode was used for arterial and venous phase scanning. The post-processing software Liver-VNC was used to obtain
VNC of arterial and portal venous scan images (VNCA, VNCV), compared with CT value, signal to noise ratio (SNR), image score,
lesion detection rate and radiation dose of liver, spleen, pancreas and erector spinae muscle in the three groups of TNC, VNCA,
and VNCV images. Results There were significant difference between the CT values, SNR and noise of liver, spleen, pancreas
and erector spinae between TNC and VNCA and VNCV (P<0.05). And there was no significant difference between VNCA and VNCV,
the CT values between VNCA and VNCV (liver P=0.151丨 spleen P=0.644丨 pancreas P=0.399丨 erector spinae P=0.558), SNR (liver
P=0.568丨 spleen P=0.922丨 pancreas P=0.628丨 verticalSpinal muscle P=0.745), noise (liver P=0.856丨 spleen P=0.983丨 pancreas
P=0.515丨 erector spinae P=0.745)丨 there were no significant difference between the radiation dose (P=0.286) in the three groups
of TNC, VNCA, and VNCV images, but there were significant difference between the total radiation dose (P<0.001) in traditional
enhanced scanning mode and dual-energy scanning mode丨 the scores of the three-phase images of TNC, VNCA, and VNCV were not
statistically significant (P=0.701)丨 the detection rates of the three-phase images of TNC, VNCA, and VNCV were 82.2%, 81.5%,
80.8%, χ2=0.091, P=0.956, showed no significant difference. Conclusion The VNC of the upper abdomen can basically replace the
TNC, besides, it can reduce one phase radiation dose, which has a great advantage in returning patients.
王玉凤，石凤祥，杨学东，史珊，马云瑶. 上腹部双能量CT虚拟平扫代替传统平扫的可行性研究[J]. 中国医疗设备, 2021, 36(10): 104-107.
WANG Yufeng, SHI Fengxiang, YANG Xuedong, SHI Shan, MA Yunyao. Feasibility Study of Virtual Non-contrast-Enhanced Instead of
True Non-contrast-Enhanced on Upper Abdomen. China Medical Devices, 2021, 36(10): 104-107.
