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中华医学超声杂志(电子版) ›› 2022, Vol. 19 ›› Issue (08) : 774 -778. doi: 10.3877/cma.j.issn.1672-6448.2022.08.008

浅表器官超声影像学

超声影像组学标签对乳腺癌腋窝淋巴结转移的预测价值
王瑛1, 陈英格1, 叶素敏1, 陈东2, 刘宇3, 刘再毅3, 刘敏4,()   
  1. 1. 510120 广州医科大学附属第一医院超声科
    2. 650118 昆明医科大学第三附属医院(云南省肿瘤医院)超声科
    3. 510080 广州,广东省人民医院放射科
    4. 510060 广州,华南肿瘤学国家重点实验室 肿瘤医学省部共建协同创新中心 中山大学肿瘤防治中心(中山大学附属肿瘤医院)超声科
  • 收稿日期:2021-02-23 出版日期:2022-08-01
  • 通信作者: 刘敏
  • 基金资助:
    国家重点研发计划资助(2017YFC1309100)

Ultrasound-based radiomics to predict axillary lymph node metastasis in breast cancer

Ying Wang1, Yingge Chen1, Sumin Ye1, Dong Chen2, Yu Liu3, Zaiyi Liu3, Min Liu4,()   

  1. 1. Department of Ultrasound, the First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510120, China
    2. Department of Ultrasound, the Third Affiliated Hospital of Kunming Medical University, Yunnan Cancer Hospital, Yunnan Cancer Center, Kunming 650118, China
    3. Department of Radiology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou 510080, China
    4. Department of Ultrasound, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou 510060, China
  • Received:2021-02-23 Published:2022-08-01
  • Corresponding author: Min Liu
引用本文:

王瑛, 陈英格, 叶素敏, 陈东, 刘宇, 刘再毅, 刘敏. 超声影像组学标签对乳腺癌腋窝淋巴结转移的预测价值[J]. 中华医学超声杂志(电子版), 2022, 19(08): 774-778.

Ying Wang, Yingge Chen, Sumin Ye, Dong Chen, Yu Liu, Zaiyi Liu, Min Liu. Ultrasound-based radiomics to predict axillary lymph node metastasis in breast cancer[J]. Chinese Journal of Medical Ultrasound (Electronic Edition), 2022, 19(08): 774-778.

目的

探讨基于常规超声的影像组学特征预测乳腺癌腋窝淋巴结转移的应用价值。

方法

回顾性收集2020年1月至2020年10月于中山大学肿瘤防治中心就诊经手术病理确诊的265例乳腺癌患者的临床资料和术前超声图像,按超声检查时间顺序,将患者分为训练集(159例)和验证集(106例)。应用ImageJ软件手动勾画病灶区域,使用Pyradiomics从每个病灶区域中提取影像组学特征,采用多种方法逐步筛选特征,应用Logistic回归构建预测乳腺癌腋窝淋巴结转移的超声影像组学标签。在训练集和验证集上采用ROC曲线、校准曲线和决策曲线评估超声影像组学标签预测乳腺癌腋窝淋巴结转移的效能。

结果

最终筛选出8个关键超声影像组学特征用于构建超声影像组学标签。该标签在训练集和验证集中预测乳腺癌腋窝淋巴结转移的ROC曲线下面积分别为0.805(95%CI:0.734~0.876)、0.793(95%CI:0.706~0.880)。在校准曲线中,该标签在训练集和验证集均表现出较好的校准度(P=0.592、0.593),决策曲线分析进一步表明了该标签具有一定的临床实用性。

结论

基于超声的影像组学标签在预测乳腺癌腋窝淋巴结转移方面具有一定价值,可为治疗前乳腺癌的准确分期以及治疗方案的合理选择提供参考依据。

Objective

To explore the value of a radiomics model based on ultrasound imaging in predicting the axillary lymph node status of patients with breast cancer.

Methods

A total of 265 patients with early-stage breast cancer were retrospectively analyzed, all of whom underwent preoperative breast ultrasound examination at Sun Yat-sen University Cancer Center from January 2020 to October 2020. According to the order of examination time, the patients were divided into a training group (n=159) and a validation group (n=106). ImageJ software was used to manually delineate the lesion area in the ultrasound image along the tumor boundary. Pyradiomics was used to extract 1130 features from each lesion area, and three statistical methods were used to screen the features. Finally, a logistic regression model was used to construct ultrasound imaging radiomics model. The receive operating characteristic (ROC) curve, calibration curve, and decision curve were used to evaluate the performance and value of the ultrasound imaging radiomics model in predicting axillary lymph node status.

Results

A total of eight key image features were selected to construct the ultrasound imaging radiomics model. The area under the ROC curve values of the model in the training group and the validation group were 0.805 (95% confidence interval [CI]: 0.734-0.876) and 0.793 (95% CI: 0.706-0.880), respectively. The calibration curve showed that the model had a good calibration in both the training and validation groups (P=0.592、0.593); besides, the decision curve analysis confirmed that the model had some clinical practicability.

Conclusion

Ultrasound-based imaging radiomics model is of great value in predicting the axillary lymph node status of patients with breast cancer before surgery, which could guide clinicians in the accurate staging of breast cancer and selection of appropriate therapeutic regimen.

图1 乳腺癌腋窝淋巴结转移患者病灶分割图像。图a为常规超声图像示乳腺原发病灶;图b为应用ImageJ软件描记肿瘤边界进行病灶分割
表1 筛选出的8个关键影像组学特征
图2 超声影像组学模型预测乳腺癌腋窝淋巴结转移的ROC曲线 注:AUC为曲线下面积
表2 超声影像组学模型的预测效能
图3 超声影像组学模型对乳腺癌腋窝淋巴结转移预测概率的校准曲线
图4 超声影像组学模型预测乳腺癌腋窝淋巴结转移的决策分析曲线(在训练集和验证集中,在极大的阈值区间范围内,净获益均较2条极端曲线高) 注:图中2条极端曲线表示不干预任何患者(粗虚线),净获益为0;干预所有患者(细虚线),净获益为斜率为负值的反斜线
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