通过将原始超声参数纳入机器学习来改善乳腺癌诊断。
Improving breast cancer diagnosis by incorporating raw ultrasound parameters into machine learning.
作者信息
Baek Jihye, O'Connell Avice M, Parker Kevin J
机构信息
Department of Electrical and Computer Engineering, University of Rochester, Rochester, NY, United States of America.
Department of Imaging Sciences, University of Rochester Medical Center, Rochester, NY, United States of America.
出版信息
Mach Learn Sci Technol. 2022 Dec 1;3(4):045013. doi: 10.1088/2632-2153/ac9bcc. Epub 2022 Nov 7.
The improved diagnostic accuracy of ultrasound breast examinations remains an important goal. In this study, we propose a biophysical feature-based machine learning method for breast cancer detection to improve the performance beyond a benchmark deep learning algorithm and to furthermore provide a color overlay visual map of the probability of malignancy within a lesion. This overall framework is termed disease-specific imaging. Previously, 150 breast lesions were segmented and classified utilizing a modified fully convolutional network and a modified GoogLeNet, respectively. In this study multiparametric analysis was performed within the contoured lesions. Features were extracted from ultrasound radiofrequency, envelope, and log-compressed data based on biophysical and morphological models. The support vector machine with a Gaussian kernel constructed a nonlinear hyperplane, and we calculated the distance between the hyperplane and each feature's data point in multiparametric space. The distance can quantitatively assess a lesion and suggest the probability of malignancy that is color-coded and overlaid onto B-mode images. Training and evaluation were performed on patient data. The overall accuracy for the most common types and sizes of breast lesions in our study exceeded 98.0% for classification and 0.98 for an area under the receiver operating characteristic curve, which is more precise than the performance of radiologists and a deep learning system. Further, the correlation between the probability and Breast Imaging Reporting and Data System enables a quantitative guideline to predict breast cancer. Therefore, we anticipate that the proposed framework can help radiologists achieve more accurate and convenient breast cancer classification and detection.
提高乳腺超声检查的诊断准确性仍然是一个重要目标。在本研究中,我们提出了一种基于生物物理特征的机器学习方法用于乳腺癌检测,以超越基准深度学习算法的性能,并进一步提供病变内恶性概率的彩色叠加视觉图。这个整体框架被称为疾病特异性成像。此前,分别利用改进的全卷积网络和改进的GoogLeNet对150个乳腺病变进行了分割和分类。在本研究中,对勾勒出轮廓的病变进行了多参数分析。基于生物物理和形态学模型,从超声射频、包络和对数压缩数据中提取特征。具有高斯核的支持向量机构建了一个非线性超平面,我们计算了超平面与多参数空间中每个特征数据点之间的距离。该距离可以定量评估病变,并给出恶性概率,以颜色编码并叠加在B模式图像上。在患者数据上进行了训练和评估。在我们的研究中,对于最常见类型和大小的乳腺病变,分类的总体准确率超过98.0%,受试者工作特征曲线下面积为0.98,这比放射科医生和深度学习系统的性能更精确。此外,概率与乳腺影像报告和数据系统之间的相关性能够提供预测乳腺癌的定量指南。因此,我们预计所提出的框架可以帮助放射科医生实现更准确、便捷的乳腺癌分类和检测。