多模型自适应统计迭代重建算法在高原地区儿童超低剂量胸部CT检查中的应用

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中图分类号：R814.2文献标识码：A 文章编号：1000-503X（2025）01-0029-06

DOI：10.3881/j.issn.1000-503X.16068

Application of Multi-Model Adaptive Statistical Iterative Reconstruction-Veo in Ultra-Low Dose Chest CT Examination of Children in Plateau Area

WANG Xiantao’，BAI Ruiting'，Cidanwangjiu’，Suolangnima¹，Nimazhuoga'，SU Baiyan² 1 Department of Radiology，Xizang Autonomous Region People’s Hospital，Lhasa 85Oooo，China （20 2 Department of Radiology，PUMC Hospital，CAMS and PUMC，Beijing 100730，China

Corresponding author：SUBaiyan Tel：010-69159608，E-mail：situzi420@163.com

ABSTRACT： ObjectiveTo explore the application value of multi-model adaptive statistical iterative reconstruction-Veo（ASiR-V）in ultra-low dose chest CT examination of children in the plateau area.MethodsThe children who underwent chest CT examination in Xizang Autonomous Region People’s Hospital were enrolled in this study and asigned into two groups according to the scanning conditions. Group A underwent scanning at a tube voltage of 100kV and ASiR-V 50% reconstruction，and group B underwent scanning at a tube voltage of 80kV and ASiR- V0 （Group B1）and ASiR-V 50% （Group B2） reconstruction. The image quality of each group was evaluated objectively and subjectively.The radiation dose and image quality were compared between groups. ResultsGroupsA and B showed the volume CT dose indexes of （2.33±0.62） mGy and （0.86±0.01 ）mGyandthedoselength products of （ 65.01±25.12 ）mGy·cm and （ 23.55±3.38 ）mGy·cm，respectively，which presented differences between groups（both P<0.001 ）.The image noise in the bilateral upper and middle lung areas in group B2 was lower than that in group B1 but higher than that in group A （all P<0.001 ）.There was no significant difference in image quality score of the lung window among groups （all P>0.05 ）.Groups A，B1，and B2 had no significant differencesin ascending aorta （ P=0.538 ）or liver CT value （ P=0.175 ）in the mediastinal window.The signal-to-noise ratios and contrast-to-noise ratios of ascending aorta and liver in group B2 were higher than those in group B1（all P<0.001 ）and lower than those in group A（all P<0.05 ）.The image quality score of the mediastinal window followed a descending order of group A> group B2 > group B1 （all P<0.001 ）。（剩余9197字）