{
  "abstract": "Background and purpose Large vessel occlusion (LVO) is a major cause of acute ischemic stroke (AIS). Identifying its underlying etiology, particularly intracranial atherosclerotic stenosis (ICAS), is crucial for optimizing endovascular thrombectomy (EVT). Intra-procedural occlusive signs can offer clues, but their interpretation is often subjective. This study proposes a radiomics-based approach to objectively characterize angiographic signs and predict occlusion etiology in real time.Methods We retrospectively included 465 EVT-treated patients with acute M1-segment MCA occlusion from two centers (January 2018-December 2023). Radiomics features were extracted from angiographic parametric imaging (API) and used to develop a radiomics score via least absolute shrinkage and selection operator (LASSO) logistic regression. The score’s predictive value for ICAS-LVO was assessed using logistic regression, and the optimal cut-off was determined via the Youden index. Subgroup analyses were performed to compare procedural outcomes between radiomics-inferred ICAS and embolic occlusions.Results The radiomics score was significantly higher in ICAS-related occlusions than in embolic occlusions (median 0.39 vs 0.89, P<0.001) and was the strongest independent predictor of ICAS etiology (adjusted odds ratio (OR) 25.40, 95% CI 12.13 to 56.94, P<0.001). Key discriminative features included texture-based parameters from perfusion maps. Based on the Youden index, a cut-off of 0.569 was defined to stratify cases into radiomics-inferred ICAS and embolic groups. Among patients treated with contact aspiration, those with radiomics-inferred ICAS occlusion had lower first-pass reperfusion rates compared with those with radiomics-inferred embolic occlusion (35.6% vs 60.7%, P-value Bonferroni correction =0.004).Conclusion Radiomics features extracted from API offer an objective method for intra-procedural inference of occlusion etiology, particularly ICAS-LVO. This approach may support technical efficacy and procedural planning during EVT, especially in populations or regions with higher ICAS prevalence.",
  "authors": [
    {
      "affiliations": [
        "Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China"
      ],
      "name": "Bingyang Zhao"
    },
    {
      "affiliations": [
        "Department of Neurosurgery, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China"
      ],
      "name": "Weidong Yu"
    },
    {
      "affiliations": [
        "Department of Neurology, Songyuan Jilin Oilfield Hospital, Songyuan, China"
      ],
      "name": "Dongsheng Ju"
    },
    {
      "affiliations": [
        "Department of Neurology, Zhejiang Provincial People’s Hospital, Hangzhou, Zhejiang, China"
      ],
      "name": "Xinzhao Jiang"
    },
    {
      "affiliations": [
        "Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China"
      ],
      "name": "Zhongyu Zhao"
    },
    {
      "affiliations": [
        "Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China"
      ],
      "name": "Shenwen Zhu"
    },
    {
      "affiliations": [
        "Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China"
      ],
      "name": "Jie Li"
    },
    {
      "affiliations": [
        "Neusoft Medical Systems Co Ltd, Shenyang, Liaoning, China"
      ],
      "name": "Siyu He"
    },
    {
      "affiliations": [
        "Department of Neurology, China-Japan Union Hospital of Jilin University, Changchun, Jilin, China"
      ],
      "name": "Jing Mang"
    }
  ],
  "title": "Does the occlusive sign play a role in endovascular thrombectomy: a radiomics-based approach",
  "uid": "bf5df2b3-e981-53aa-8a99-66988762e3e4"
}