基于深度学习的人体肋骨骨折智能检测技术

目的将人工智能中的深度学习技术应用到人体肋骨骨折识别,实现人体肋骨骨折智能检测,提高法医肋骨骨折诊断效率。方法采集3143例人体胸部X线数字影像(2602例用于训练,541例用于测试),标注肋骨骨折特征点,通过多层网络堆叠,分层、分级主动学习原始数据高度抽象的特征表述,并将此特征反馈至检测器进行骨折检测,输出骨折位置及相应置信度。结果基于深度学习的人体肋骨骨折检测准确率在90%以上。结论基于深度学习的人体肋骨骨折检测准确率较高,可用于辅助法医进行肋骨骨折识别诊断、检验鉴定等,本研究可为人体其他部位骨骼损伤智能检测提供参考。     

Hyperspectral imaging in forensic science: An overview of major application areas

Analysis of evidence is a challenge. Crime scene materials are complex, diverse, sometimes of an unknown nature. Forensic science provides the most critical applications for their examination. Chemical tests, analytical methods, and techniques to process the evidence must be carefully selected by the forensic scientist. Ideally, it may be interpreted, analyzed, and judged in the original context of the crime scene. In this sense, hyperspectral imaging (HSI) has been employed as an analytical tool that maintains the integrity of the samples/objects for multiple and sequential analysis and for counter-proof exams. This paper is an overview of forensic science trends for the application of HSI techniques in the last ten years (2011–2021). The examination of documents was the main area of exploration, followed by bloodstain analysis aging process; trace analysis of explosives and gunshot residue. Chemometric tools were also addressed since they are crucial to obtain the most important information from the samples. There are great challenges in applying HSI in forensic science, but there have been clear technological and scientific advances, and a solid foundation has been built for the use of HSI in real-life cases.     

An examination of the sequence of intersecting lines using attenuated total reflectance-Fourier transform infrared spectral imaging

In this study, the potential of attenuated total reflectance-Fourier transform infrared (ATR-FTIR) spectral imaging as a technique to determine the sequence of line crossings was examined. The technique was successful in determining the sequence of heterogeneous line intersections produced using ballpoint pens and laser printers. By imaging at characteristic frequencies, it was possible to form spectral images showing the spatial distribution of the materials. By examining the spectral images from the inks, it was possible to determine whether the ink was above or below the toner. In blind testing, ATR-FTIR spectral imaging results were directly compared to those obtained by eight experienced forensic document examiners using methods regularly employed in casework. ATR-FTIR spectral imaging was shown to achieve a 100% success rate in the blind tests, whereas some incorrect sequence determinations were made by the forensic document examiners when using traditional techniques. The technique was unable to image ink-jet printing, gel pens, roller ball pens, and felt-tip pens, and was also unable to determine the sequence of intersecting ballpoint pen lines.     

重建耻骨联合三维结构用于活体年龄推断的技术方法

目的建立基于MRI成像的快速耻骨联合三维结构重建技术方法。方法利用3.0 T超导磁共振仪对成年男性志愿者骨盆进行T1小角度快速激发3D梯度回波序列扫描,进行二值化阈值分割、区域增长提取骨盆软组织图像;运算获得耻骨联合三维结构模型雏形,经逆向工程软件降噪处理建立耻骨联合三维结构模型,并与耻骨CT扫描三维结构重建模型进行比较。结果耻骨联合面沟嵴、下端、腹侧缘(斜面)、背侧缘(斜面)、耻骨结节等结构显示完整,无明显噪点,与CT扫描三维重建模型吻合较好。结论 MRI扫描成像可实现快速有效的耻骨联合三维结构重建,可为法医活体年龄推断提供安全无辐射作用的三维可视化影像学技术方法。     

Thyroid Cartilage Ossification and Multislice Computed Tomography Examination: A Useful Tool for Age Assessment?

Abstract: Many authors have studied the thyroid cartilage ossification process using radiographic features for age estimation of individuals. Their results were various: Sugiyama reported excellent correlation coefficients between ossification rates and civil age, unlike most other authors. We hypothesized that recent advances in imaging techniques would enable more precise evaluation of the ossification of the thyroid cartilage. We retrospectively analyzed the CT scans of 312 French patients using postprocessing software to examine the pattern of thyroid cartilage ossification, calculating the ossified volume of the cartilage on 3D reconstructions. Pearson’s correlation coefficients for volume were 0.73 for men and 0.75 for women (standard error 18.02 and 17.06), indicating considerable inter‐individual variability. Although a correlation between civil age and morphological changes was found, these methods based on thyroid cartilage ossification were not accurate enough for the assessment of individual age.     

手法联合盐酸氨基葡萄糖治疗膝骨关节炎临床观察

目的 基于红外热成像技术评价手法治疗膝骨关节炎(knee osteoarthritis,KOA)的临床疗效,探讨手法作用机制,形成手法治疗KOA规范化诊疗评估方案。方法 通过简单随机方法将40例KOA患者分为对照组和治疗组,每组20例（治疗组和对照组分别被剔除1例和2例）。治疗组采用手法治疗联合盐酸氨基葡萄糖胶囊口服,对照组采用自我按摩联合盐酸氨基葡萄糖胶囊口服。治疗2周后,以膝关节区域温度、督脉温度、视觉模拟量表（visual analogue scale, VAS）评分、西安大略和麦克马斯特大学骨关节炎指数（the Western Ontario and McMaster Universities Osteoarthritis Index,WOMAC）、连续5次坐立时间、15 m直线连续行走时间为指标,评价两组疗效。结果 两组治疗后VAS评分均显著降低（P＜0.05）;治疗组治疗前后VAS评分差值显著大于对照组（P＜0.05）。两组治疗后WOMAC的疼痛、僵硬、生活功能评分和总分显著降低（P＜0.05）;其中治疗组治疗前后WOMAC总分和僵硬评分差值显著大于对照组（P＜0.05）。两组治疗后连续5次坐立时间、15 m直线连续行走时间均显著降低（P＜0.05);治疗组治疗后连续5次坐立时间、15 m直线连续行走时间降低值显著大于对照组（P＜0.05）。两组治疗后膝关节区域温度显著降低（P＜0.05）,督脉区域温度显著升高(P＜0.05);治疗组治疗后膝关节区域温度降低值和督脉区域温度升高值显著大于对照组（P＜0.05)。两组基于WOMAC总分的临床疗效比较,差异有统计学意义（P＜0.05）,治疗组临床疗效明显优于对照组。结论 中医手法治疗可减轻KOA患者膝关节疼痛、僵硬症状,改善日常生活功能,疗效优于自我按摩。     

针刺对睡眠剥夺受试者面部红外热成像的影响

目的 观察针刺对睡眠剥夺受试者面部新陈代谢热的影响。方法 将64例健康青年受试者随机分为4组：正常睡眠组（A组）、睡眠剥夺组（B组）、睡眠剥夺与小醒脑开窍针法配合申脉、照海穴针刺治疗组（C组）和睡眠剥夺与非经非穴针刺治疗组（D组）。A组保持正常睡眠状态,对B、C、D组同时进行24 h睡眠剥夺,次日应用红外热成像技术检测4组受试者面部热值,及观察C、D组针刺治疗后面部热值的变化。结果 红外热成像图显示,A组面部呈温热状态,B、C、D组面部呈高热状态。A组热值显著低于B组、C组和D组（P<0.05）。B、C、D 3组热值多重比较,差异均无统计学意义（P>0.05）。C、D组针刺治疗后面部热值均较治疗前显著下降（P<0.05）,但C组治疗后面部热值降低值显著大于D组（P<0.05）。结论 睡眠剥夺可导致面部热值升高,小醒脑开窍针法配合申脉、照海穴针刺能够降低睡眠剥夺者面部较高热值,且疗效优于非经非穴针法。     

基于数据挖掘实现成人喉软骨和舌骨CT图像重组的年龄推断

目的 运用数据挖掘技术探索喉软骨和舌骨CT图像重组用于成人年龄推断的可行性.方法 收集413例颈部薄层CT图像,样本年龄范围18～<80岁,将样本随机分为测试集和训练集.参照TURK等的分级方法,对所有样本进行全方位综合阅片分级,将甲状软骨骨化过程分为6级,环状软骨骨化过程分为5级,舌骨大角和舌骨体的骨性结合分为3级....     

针刺阳陵泉对不同病程缺血性脑卒中偏瘫患者脑效应机制研究

目的 基于功能磁共振成像技术探究针刺阳陵泉对不同病程缺血性脑卒中偏瘫患者的脑效应机制。方法 筛选纳入损伤以单侧基底节区和（或）放射冠为主的40例缺血性脑卒中偏瘫患者分为长病程组24例、短病程组16例。对所有受试者进行1次fMRI扫描,扫描期间给予针刺患侧阳陵泉干预,持续1 Hz的频率平补平泻捻针1分钟,留针8分钟出针。选取双侧半球的辅助运动区（SMA）、背侧运动前区（PMd）、腹侧运动前区（PMv）、初级运动区（M1）共计8个种子点,计算并对比静息态及针刺态下每对种子点之间的功能连接强度的变化及与FMA的相关性。结果 静息态时,长病程组PMv-R与SMA-L之间功能连接度强于短病程组（P＜0.05）;针刺态时,长病程组中SMA-L与PMv-L之间功能连接弱于静息态时（P＜0.05）,短病程组中SMA-L与SMA-R、PMv-R之间、SMA-R与PMd-R之间、PMv-R与PMv-L之间功能连接强于静息态（P＜0.05）;针刺态时,长病程组和短病程组间各对种子点对在针刺态下和全组各对种子点在静息态与针刺态下之间功能连接强度差异均无统计学意义(P＞0.05);长病程组中,针刺态时下肢FMA评分与健侧PMd-L—M1-L之间功能连接强度呈负相关（r=-0.411, P＜0.05）;短病程组中,静息态时下肢FMA评分与PMd-L—M1-L、PMv-R—M1-R之间功能连接强度呈负相关（r=-0.588及r=-0.542,P＜0.05）;在全组中,静息态时下肢FMA评分与PMv-R—M1-R之间功能连接强度呈负相关（r=-0.432, P＜0.05）;上下肢FMA总分与PMv-R—M1-R之间功能连接强度呈负相关（r=-0.319, P＜0.05）。结论 不同病程脑卒中偏瘫患者在接受针刺患侧阳陵泉后在脑结构重组及脑功能重塑的过程中有着差异性的表现,激活的脑区也存在差别,病程时间越长的患者,其大脑病灶侧PMv与健侧SMA之间存在更强的功能连接。针刺阳陵泉时,脑区功能连接在双侧SMA、PMd、PMv、M1之间有特定的效应靶点,可能是改善患者运动功能障碍和神经缺损程度的作用机制之一。     

基 于 功 能 性 磁 共 振 成 像 技 术 探 讨 针 刺 太 冲 穴 脑 激 活 区 的 性 别 差 异

目的 采用功能性磁共振成像(functional magnetic resonance image, fMRI)技术观察针刺太冲穴所激活脑区的性别差异,以阐明针刺效应性别差异的机制。方法 女性组选取25例青年女性志愿者,男性组选取30例青年男性志愿者,针刺志愿者左侧太冲穴并收集fMRI数据。结果 女性组针刺太冲穴激活的脑区有左侧小脑下部、右侧缘上回、左侧中央后回。男性组针刺太冲穴激活的脑区有右侧缘上回、左侧中央盖沟、右侧中央旁小叶。与女性组比较,男性组更广泛地激活了右侧缘上回、右侧中央沟盖。结论 针刺受试者太冲穴激活脑区并不完全对称,针刺效应在大脑具有偏侧性,针刺太冲穴时大脑活动反应存在性别差异。