In low-resource settings, blind-sweep ultrasound provides a practical and accessible method for identifying fetal growth restriction. However, unlike freehand ultrasound which is subjectively controlled, detection of biometry plane in blind-sweep ultrasound is more challenging due to the uncontrolled fetal structure to be observed and the variaties of oblique planes in the scan. In this work, we propose a structure-augmented system to detect fetal abdomen plane, where the abdominal structure is highlighted using a segmentation prior. Since standard planes are emerging gradually, the decision boundary of the keyframes is unstable to predict. We thus aggregated the structure-augmented planes with a temporal sliding window to help stabilise keyframe localisation. Extensive results indicate that the structure-augmented temporal sliding strategy significantly improves and stabilises the detection of anatomically meaningful planes, which enables more reliable biometric measurements in blind-sweep ultrasound.

翻译：在资源有限的条件下，盲扫超声为识别胎儿生长受限提供了一种实用且可获取的方法。然而，与主观控制的手持超声不同，盲扫超声中由于待观察的胎儿结构不受控制以及扫描中倾斜平面的多样性，生物测量平面的检测更具挑战性。本文提出了一种结构增强系统来检测胎儿腹部平面，通过分割先验突出显示腹部结构。由于标准平面是逐步出现的，关键帧的决策边界难以稳定预测。因此，我们将结构增强平面与时间滑动窗口相聚合，以帮助稳定关键帧定位。大量结果表明，结构增强时间滑动策略显著改善并稳定了具有解剖意义的平面的检测，从而在盲扫超声中实现更可靠的生物特征测量。