图像清晰度的量化测量探究

针对光学实验中,用肉眼判断图像最清晰位置具有人为因素影响多、可重复性差、操作复杂等不足,提出了量化图像清晰度的解决思路,使实验数据更加可靠、准确,使实验过程更加科学、快捷。     

住院医师规范化培训在医学影像科的教学方法探索——以南京市第一医院医学影像科为例

住院医师规范化培训是医学生毕业后教育的重要组成部分。医学影像科作为一门独立学科承担着对住院医师进行规范化的影像培训工作,我院医学影像科近几年应用多种教学新方法进行医学影像住院医师规范化培训。分层教学有助于适应影像专业及非影像专业不同层次学习需求;PBL教学及CBL教学方法有利于调动学员的积极性及提高理论联系实际的能力;导师制的教学模式使个体化教学成为可能;视频和微课教学是技术层面上的辅助教学;量化评分与动态监督保证培训的良好效果;人工智能辅助教学可以为不同专业、不同层次的规培医师提供个性化的教学模式。     

医学影像专业研究生CT/MRI图像后处理教学方法探讨

CT/MRI图像后处理是医学影像专业研究生临床实践的重要课程之一。做好CT/MRI图像后处理教学工作具有重要意义。理论与上机相结合的教学方法;从简单到复杂,逐个部位掌握的教学策略;图像后处理质量控制反馈机制三位一体的教学手段能够使医学影像专业研究生更快更好地适应图像后处理临床实践工作。     

旋转数字成像技术在骨骼损伤中的应用价值

探讨数字摄影三维重建成像技术在骨关节损伤中的应用价值．方法:运用旋转数字摄影血管造影的原理,利用血管造影检查设备进行骨关节系统检查52例．结果:重建图像效果满意,清楚显示骨骼解剖结构及关节毗邻关系,对骨折错位及关节脱位诊断明确．结论:旋转数字摄影3D成像技术,是一种新的特殊的检查方法,其图像立体观察直观而逼真,对不规则骨或复杂的骨关节骨折提高诊断准确率具有很好的临床应用价值．     

MEMS Test System Based on Virtual Instrument Technology

On account of the multiformity of MEMS devices, it is necessary to integrate with some optical measurement techniques for meeting static and dynamic unit test requirements. In this paper, an automated MEMS test system is built of some commercially available components and instruments based on virtual instrument technology. The system is integrated with stroboscopic imaging, computer micro-vision, microscopic Mirau phase shifting interferometry, and laser Doppler vibrometer, and is used for the measurement of full-view in-plane and out-of-plane geometric parameters and periodical motions and single spot out-of-plane transient motion. The system configuration and measurement methods are analyzed, and some applications of the measurement of in-plane and out-of-plane dimensions and motions were described. The measurement accuracy of in-plane dimensions and out-of-plane dimensional is better than 0.2 μm and 5 nm respectively. The resolution of measuring in-plane and out-of-plane motions is better than 15 nm and 2 nm respectively.     

基于云课堂的混合式学习在医学影像技术课程教育中的应用——以《盆部影像检查技术》为例

随着"互联网+教育"的发展,设计和开展高职院校混合式教学势在必行。本文以高职3年制医学影像技术专业核心课程《盆部影像检查技术》为例,设计和实施了基于云课堂的混合式教学方案,并对教学效果进行了分析和评价。     

光电器件光谱响应特性的实验研究

设计了一套测试光电器件光谱响应的实验装置，编制了测试实验软件，利用泼装置对二代像增强器的光谱响应进行了测试，给出了测试曲线及有关性能参数，并对其实验误差进行了分析。     

基于二次成像指纹光学采集系统的设计

本文在查阅相关专利的基础上,模拟了二次成像非共轴光学采集系统,该系统可校正与光轴成倾斜物面所引起的畸变,可使仪器体积小,重量轻,成本低,便于批量生产。经过优化后,可使指纹采集系统的畸变控制在0.2%以内,满足指纹识别的要求。     

基于RD域分块的改进距离徙动成像算法

研究了二维频域成像算法,提出一种基于RD域分块的改进距离徙动成像算法,并将该算法与近似算法和一般逆变标算法进行了点阵目标仿真和运算效率比较.当测绘带较宽且距离徙动较大时,该算法聚焦性能优于近似算法和一般逆变标算法.通过比较还可看出该算法运算效率高于逆变标算法.最后用实测数据仿真验证了该算法是可行的.     

Strengths and Weaknesses of Non-enhanced and Contrast-enhanced Cadaver Computed Tomography Scans in the Teaching of Gross Anatomy in an Integrated Curriculum

Cadaver-specific postmortem computed tomography (PMCT) has become an integral part in anatomy teaching at several universities. Recently, the feasibility of contrast-enhanced (CE)-PMCT has been demonstrated. The purpose of this study was to identify particular strengths and weaknesses of both non-enhanced and contrast-enhanced PMCT compared to conventional cadaver dissection. First, the students’ perception of the learning effectiveness of the three different modalities have been assessed using a 34-item survey (five-point Likert scale) covering all anatomy course modules. Results were compared using the nonparametric Friedman Test. Second, the most frequent artifacts in cadaver CT scans, were systematically analyzed in 122 PMCT and 31 CE-PMCT data sets to quantify method-related limitations and characteristics. Perfusion quality was assessed in 57 vascular segments (38 arterial and 19 venous). The survey was answered by n = 257/320 (80.3%) students. Increased learning benefits of PMCT/ CE-PMCT compared to cadaver dissection were found in osteology (2/3 categories, P < 0.001), head and neck (2/5 categories, P < 0.01), and brain anatomy (3/3 categories, P < 0.01). Contrast-enhanced-PMCT was perceived particularly useful in learning vascular anatomy (10/10 categories, P < 0.01). Cadaver dissection received significantly higher scores compared to PMCT and CE-PMCT in all categories of the abdomen and thorax (7/7 categories, P < 0.001), as well as the majority of muscular anatomy (5/6 categories, P < 0.001). Frequent postmortem artifacts (total n = 28, native-phase n = 21, contrast injection-related n = 7) were identified and assessed. The results of this work contribute to the understanding of the value of integrating cadaver-specific PMCT in anatomy teaching.