The study on the optimization of portal vein image quality in liver cirrhosis by combining deep learning image reconstruction with"three low techniques"spectrum CT with low keV
10.3969/j.issn.1002-1671.2025.10.029
- VernacularTitle:深度学习图像重建联合"三低技术"能谱CT低keV在优化肝硬化门静脉图像质量的研究
- Author:
Ming LI
1
;
Yongjun JIA
;
Li SHEN
;
Junfeng FAN
;
Nan YU
;
Yong YU
;
Danqing ZHANG
Author Information
1. 陕西中医药大学附属医院医学影像科,陕西 咸阳 712000
- Publication Type:Journal Article
- Keywords:
portal vein;
computed tomography;
deep learning image reconstruction;
spectral imaging;
low dose;
image quality;
liver cirrhosis
- From:
Journal of Practical Radiology
2025;41(10):1729-1733
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the value of deep learning image reconstruction(DLIR)combined with"three low(low radiation dose,low contrast dose,and low contrast injection rate)techniques"of spectrum CT with low keV in optimizing the image quality of portal vein for liver cirrhosis.Methods Sixty patients with liver cirrhosis who underwent computed tomography portal venography(CTPV)were selected and randomly divided into standard protocol group(group A,n=30)and"three-low"protocol group(group B,n=30).The group A with 120 kVp,contrast dose of 1.4 mL/kg,injection rate of 4.0-5.0 mL/s,and reconstructed 50%adaptive statistical iterative reconstruction-Veo(ASIR-V)image.The group B with 80 kVp/140 kVp double instantaneous switching gemstone spectral imaging(GSI)scan,contrast dose of 1.0 mL/kg,injection rate of 3.0-3.5 mL/s,and reconstructed 40 keV DLIR-M and DLIR-H images.The quality of portal vein images,effective dose(ED),contrast dose and injection rate were compared between the two groups.Results The ED of(4.10±1.56)mSv in group B was lower than that of(7.88±1.08)mSv in group A(P<0.001),and the contrast dose of(67.26±8.74)mL in group B was lower than that of(99.12±8.84)mL in group A(P<0.001).The injection rate of 3.0-3.5 mL/s in group B was reduced by 25%-30%compared with group A.Group B had the greatest contrast-to-noise ratio(CNR)and signal-to-noise ratio(SNR)of portal vein in the 40 keV DLIR-H.The subjective image quality scores were in good agreement between the two physicians(Kappa value>0.75).The subjective DLIR score in group B was higher than that in group A.Conclusion DLIR combined with"three low techniques"spectrum CT with low keV can improve the image quality of portal vein in liver cirrhosis patients.
