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Chinese Journal of Lung Diseases(Electronic Edition) ›› 2025, Vol. 18 ›› Issue (03): 411-415. doi: 10.3877/cma.j.issn.1674-6902.2025.03.013

• Original articles • Previous Articles    

AI-based CT quantitative analysis was used for efficacy analysis in the evaluation of pulmonary nodules and degree of infiltration

Yanyun Zhang1, Qizhi Bai1, Jianwei Zhang2, Dazhi Guo1, Dan Ma1, Mingfu Gong1,()   

  1. 1. Department of Radiology,The Second Affiliated Hospital of Army Medical University
    2. Department of Oncology,The First Affiliated Hospital of Army Medical University
  • Received:2024-12-27 Online:2025-06-25 Published:2025-07-17
  • Contact: Mingfu Gong

Abstract:

Objective

To evaluate the value of AI-based CT quantitative analysis on pulmonary nodules.

Methods

A total of 182 patients with lung cancer confirmed by surgery and pathology in Xinqiao Hospital from September 2021 to May 2022 were retrospectively analyzed,including 63 cases of invasive adenocarcinoma (MIC),104 cases of minimally invasive adenocarcinoma (MIA) and 15 cases of carcinoma in situ (AIS). All patients underwent CT quantitative analysis of AI. The diagnostic efficacy of pathology and AI-assisted CT examination for the nature and infiltration degree of pulmonary nodules was compared. At the same time,the AI analysis parameters of solid pulmonary nodules and ground glass pulmonary nodules and different infiltration degree of pulmonary nodules were compared.

Results

Surgical pathology showed that 95 cases were solid nodules,87 were ground glass nodules;15 cases were in situ pulmonary nodules,106 were microinvasive pulmonary nodules and 63 were invasive pulmonary nodules. The sensitivity,specificity,accuracy,positive predictive value and negative predictive value of the gold standard,No statistical difference (P>0.05);Comparison of CT parameters between solid nodules and ground glass nodules showed that:The mass of solid nodules was (448.34±60.05) g,the 3D long diameter was (16.88±0.80) mm,the average length and short diameter was (12.99±0.63)mm,the average CT value was (-453.29±15.17)Hu,and the CT variance was(107 460.12±17 115.26) Hu. The maximum value of CT was (401.03±32.37) Hu,and the entropy value was(9.09±0.88),which were higher than those of ground glass nodules,and there were differences between the groups (P<0.05). The CT parameters of lung nodules with different degrees of invasion showed that the weight and volume of lung nodules in situ were (238.04±163.23) g and (716.66±479.08) cm3,which were higher than those of invasive carcinoma,but lower than those of minimally invasive carcinoma,and the 3D long diameter and CT average were lower than those of minimally invasive carcinoma and invasive carcinoma (P<0.05). Compared with carcinoma in situ,microinvasive carcinoma had a higher mean length of meridian and invasive carcinoma had a lower mean length of meridian (P <0.05).

Conclusion

The AI-assisted CT examination can accurately diagnose the nature and infiltration degree of pulmonary nodules,and the quantitative analysis of relevant parameters can provide a basis for disease evaluation.

Key words: Artificial intelligence, Quantitative analysis of CT, Pulmonary nodules, Nature, Degree of infiltration, Iconography

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