通过结构增强与时间聚合，提升盲扫超声中胎儿腹平面检测稳定性。
Structure-Augmented Standard Plane Detection with Temporal Aggregation in Blind-Sweep Fetal Ultrasound
- 利用分割先验突出腹部结构，增强平面识别
- 采用时间滑动窗口聚合，稳定关键帧定位
- 适合资源匮乏地区胎儿生长监测应用
在资源有限的环境中，盲扫超声为识别胎儿生长受限提供了一种实用且易获取的方法。然而，与手动操作超声相比，盲扫超声因胎儿结构不可控及扫描平面角度多变，导致生物测量平面检测更具挑战性。本文提出一种结构增强系统以检测胎儿腹部平面，通过分割先验突出腹部结构。由于标准平面是渐进出现的，关键帧的决策边界不稳定。为此，我们采用时间滑动窗口聚合结构增强后的平面，以稳定关键帧定位。大量实验表明，该结构增强与时间聚合策略显著提升了并稳定了解剖有意义平面的检测，从而实现更可靠的盲扫超声生物测量。
原文摘要 · Abstract (English)
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.
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