Anal pit visualisation during routine ultrasound screening

The dataset includes images routinely collected in a private fetal-maternal medicine clinic by experts in prenatal ultrasound. It can be used as teaching material or for training AI models. The dataset includes prenatal ultrasound visualization of the perianal muscular complex, often referred to as a "target sign." The gestational age of the included fetuses ranges between 20 and 38 weeks of gestation. In addition to the anonymized images, a table containing file names, ID numbers (1 to 827), and gestational ages is attached.本数据集包含由产前超声专家于某私立妇产专科诊所常规采集的图像，可作为教学素材或用于人工智能模型训练。数据集涵盖肛周肌复合体（perianal muscular complex）的产前超声可视化影像，该征象通常被称为“靶征（target sign）”。纳入本数据集的胎儿孕周区间为20至38孕周。除已完成匿名化处理的图像外，数据集还附带一份包含文件名、样本编号（1至827）以及孕周信息的附表。