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arXiv 2403.03217cs.CV

基于多模态注意力融合的自监督3D患者建模

Self-supervised 3D Patient Modeling with Multi-modal Attentive Fusion

United Imaging Intelligence(联影智能);University at Buffalo(布法罗大学)

Meng Zheng, Benjamin Planche, Xuan Gong, Fan Yang, Terrence Chen, Ziyan Wu

AI总结:

针对现有3D患者建模方法泛化性差、标注成本高的问题,提出含多模态注意力融合关键点检测与自监督3D网格回归的模块化方法,在多模态临床场景下实现更优的患者摆位性能。

摘要:

3D人体建模是智能医学扫描与手术室中自动化患者摆位成功的关键。现有基于CNN的端到端患者建模方案通常存在两大局限:一是需定制化网络设计,依赖大量覆盖各类真实临床场景(如患者被床单覆盖)的相关训练数据,导致实际部署时泛化性不佳;二是需要昂贵的3D人体模型标注,即耗费大量人工,系统可扩展性差。为解决这些问题,我们提出一种通用模块化3D患者建模方法,包含两部分:(a)带注意力融合的多模态关键点检测模块,用于2D患者关节定位,学习互补的跨模态患者身体信息,提升多种成像(如CT、MRI等)与临床场景(如重度遮挡)下关键点定位的鲁棒性和泛化性;(b)自监督3D网格回归模块,无需昂贵的3D网格参数标注即可训练,为临床部署带来直接成本优势。我们通过在公开数据与临床数据上开展大量患者摆位实验验证了方法的有效性,评估结果显示,在真实临床场景的多种成像模态下,该方法均取得了更优的患者摆位性能。

英文摘要:

3D patient body modeling is critical to the success of automated patient positioning for smart medical scanning and operating rooms. Existing CNN-based end-to-end patient modeling solutions typically require a) customized network designs demanding large amount of relevant training data, covering extensive realistic clinical scenarios (e.g., patient covered by sheets), which leads to suboptimal generalizability in practical deployment, b) expensive 3D human model annotations, i.e., requiring huge amount of manual effort, resulting in systems that scale poorly. To address these issues, we propose a generic modularized 3D patient modeling method consists of (a) a multi-modal keypoint detection module with attentive fusion for 2D patient joint localization, to learn complementary cross-modality patient body information, leading to improved keypoint localization robustness and generalizability in a wide variety of imaging (e.g., CT, MRI etc.) and clinical scenarios (e.g., heavy occlusions); and (b) a self-supervised 3D mesh regression module which does not require expensive 3D mesh parameter annotations to train, bringing immediate cost benefits for clinical deployment. We demonstrate the efficacy of the proposed method by extensive patient positioning experiments on both public and clinical data. Our evaluation results achieve superior patient positioning performance across various imaging modalities in real clinical scenarios.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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