我们的数据集来自武汉同济医学院附属协和医院由于CEM数据的珍贵性。我们收纳了150例患者每个患者有俩张CEM减影图。我们将数据集按照7：2：1的比例随机划分为训练集验证集和测试集。翻译成英文

Our dataset comes from Tongji Medical College Affiliated Union Hospital in Wuhan, China. Due to the rarity of CEM data, we collected a total of 150 patients, each with two CEM subtraction images. The dataset was randomly divided into a training set, validation set, and test set at a ratio of 7:2:1.