arXiv:2601.02521cs.CV2026-01

将CT扫描转为视频流,用2D模型高效检测脑出血,提升准确率。

CT Scans As Video: Efficient Intracranial Hemorrhage Detection Using Multi-Object Tracking

  • 把3D CT数据转成视频序列,用2D检测器处理,兼顾效率与上下文。
  • 在Hemorica数据集上,精确率从0.703提升至0.779,敏感性保持高。
  • 适合移动卒中单元、远程诊所等算力受限场景实时应用。

基于边缘设备的体积分层医学影像自动分析受3D卷积神经网络高内存与计算需求严重制约。本文提出一种轻量级视觉框架,通过将体积分层计算机断层扫描(CT)数据重构为时序视频流,结合2D检测效率与3D上下文必要性。该视频视角范式应用于时间敏感的颅内出血(ICH)检测任务,采用Hemorica数据集。为保障运行效率,我们对比了YOLO系列多个版本(v8、v10、v11、v12)的Nano配置,选取mAP@50最高的作为切片级主干网络。引入ByteTrack算法以保证z轴上的解剖一致性。针对视频追踪器固有的初始化延迟,提出混合推理策略与时空一致性过滤器,以区分真实病灶与瞬时预测噪声。独立测试数据结果表明,所提框架作为严格的时间验证器,使检测精确率由0.703提升至0.779,同时保持高敏感性。该方法以极低计算开销近似实现3D上下文推理,为资源受限环境(如移动卒中单元、物联网远程诊所)提供可扩展的实时患者优先级判定方案。

原文摘要 · Abstract (English)

Automated analysis of volumetric medical imaging on edge devices is severely constrained by the high memory and computational demands of 3D Convolutional Neural Networks (CNNs). This paper develops a lightweight computer vision framework that reconciles the efficiency of 2D detection with the necessity of 3D context by reformulating volumetric Computer Tomography (CT) data as sequential video streams. This video-viewpoint paradigm is applied to the time-sensitive task of Intracranial Hemorrhage (ICH) detection using the Hemorica dataset. To ensure operational efficiency, we benchmarked multiple generations of the YOLO architecture (v8, v10, v11 and v12) in their Nano configurations, selecting the version with the highest mAP@50 to serve as the slice-level backbone. A ByteTrack algorithm is then introduced to enforce anatomical consistency across the $z$-axis. To address the initialization lag inherent in video trackers, a hybrid inference strategy and a spatiotemporal consistency filter are proposed to distinguish true pathology from transient prediction noise. Experimental results on independent test data demonstrate that the proposed framework serves as a rigorous temporal validator, increasing detection Precision from 0.703 to 0.779 compared to the baseline 2D detector, while maintaining high sensitivity. By approximating 3D contextual reasoning at a fraction of the computational cost, this method provides a scalable solution for real-time patient prioritization in resource-constrained environments, such as mobile stroke units and IoT-enabled remote clinics.

脑出血检测轻量化模型视频化处理边缘计算

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