Three-dimensional (3D) cross-modality cardiac image segmentation is critical for cardiac disease diagnosis and treatment. However, it confronts the challenge of modality-specific spatial confounding. This challenge derives from the entanglement between the anatomical factor and the modality factor in space. It hurts the inference about the causality between the 3D cardiac image and the predicted label. The challenge is exacerbated by the modality distribution discrepancy and the slice structure discrepancy. The existing cross-modality segmentation methods are difficult to address this challenge due to the lack of causality. In this paper, we propose the causal knowledge fusion (CKF) framework to solve the above challenge. First, the CKF explores the causal intervention to obtain the anatomical factor and discard the modality factor. The anatomical factor is the causal invariant representation that transfers between different modalities. Thus, the CKF improves the information fusion on different imaging modalities. Second, the CKF proposes the 3D hierarchical attention mechanism to extract the multi-scale information from 3D cardiac image. It improves the spatial learning ability on 3D anatomical structure. Extensive experiments on 3D cardiac image of 503 MR patients and 518 CT patients show that the CKF is effective (Dice > 0.949), and superior to eighteen state-of-the-art segmentation methods.

高校开展党支部主题党日活动,是"不忘初心、牢记使命"主题教育的重要内容之一,研究党支部主题党日活动的创新机制,对于提高党建工作效率、提升党支部组织力起到至关重要的作用.本文将以中山大学新华学院护理学院学生党支部为研究对象,研究主题党日活动创新机制的意义,分析新时期高校学生党支部党日活动的现状及存在问题,从党日活动的制度规范、主题、内容和形式上探索创新机制,切实推动高校学生党支部党建工作的开展.

随着护理职业的国际化趋势日益显著,越来越多医学院校希望培养具有国际视野、竞争能力强的国际化护理人才.护理专业英语的教学策略相对缺乏或有限.在充分利用外教资源的前提下,但又限于学生英语基础不足以完全听懂纯外语课堂情况下,该研究以广东省某独立学院护理专业英语会话(Professional Nursing Communication)课程为例,采用一名美国护理教授授课为主,一名中国教师进行语言和文化辅助的合作教学模式,通过四学期的行动研究,在备课、授课、课外拓展、评价方式等方面不断改进,充分发挥双方优势,探索专业英语教学中中外教师合作教学模式.