瞬态诱发耳声发射信号数字滤波及相关函数分析

用数字滤波及相关函数处理技术对１０名（２０耳）学龄前儿童短声诱发的ＴＥＯＡＥ信号进行二次处理。结果表明：通过数字滤波及相关处理后的ＴＥＯＡＥ信号比原始记录的ＴＥＯＡＥ信号波形更加清晰，易于辨认，有效地提高了ＴＥＯＡＥ信号的信噪比及识别率。     

复杂指蹼挛缩和皮肤缺损的显微外科重建

目的：研究复杂指蹼挛缩和缺损的显微外科重建技术。方法：应用７种岛状皮瓣和１０种游离皮瓣重建指蹼４４例，其中应用联合移植方法同时重建虎口和拇指８例。结果：皮瓣全部成活，平均经１５个月随访，疗效优２５例，良１７例，可２例。结论：指背和手背岛状皮瓣适合修复小面积指蹼缺损，骨间背侧动脉皮瓣是修复中等指蹼创面的较佳选择，脐旁皮瓣和股前外侧皮瓣能重建大面积和不规则指蹼缺损。本组经验显示，缝合皮神经的皮瓣疗效稍优，趾蹼皮瓣重建的指蹼综合效果最佳，联合移植能有效地一期再造拇指和指蹼。     

Breast cancer screening

Radiographic imaging of the breast began in the early years of the twentieth century. Continuous advances in film quality, energy sources, targets, grids, and filters have all contributed to superior image resolution. Federal quality standards now regulate screening mammography, and mass screening for breast cancer has become widely accepted in the United States. Wider application of screening has resulted in a dramatic apparent increase in incidence rates of breast cancer; a large proportion of this increase is in ductal carcinoma in situ. During the past 30 years, nine prospective, randomized trials to evaluate the ability of screening mammography to reduce mortality from breast cancer have been completed. These trials show a 30% reduction in mortality for women ages 50–69 years, but the benefit to women aged 40–49 years remains uncertain. This uncertainty is largely attributable to the lack of properly designed and conducted studies to evaluate screening efficacy in younger women. Although there is no biological reason to predict poor screening performance in the younger age groups, the sensitivity of screening mammography is lower in younger women. Additional data suggest that screening intervals longer than 12 months are ineffective in women younger than 50 years. With shorter screening intervals, the cost associated with screening mammography is comparable to other life-saving measures widely applied in the population. New breast imaging techniques hold promise for superior image quality, but they remain investigational as tools for mass screening. Until primary prevention of breast cancer is a reality, mass screening remains available to reduce mortality from breast cancer.     

超选择动脉栓塞治疗血管搏动性耳鸣（附2例报告）

采用数字减影血管造影技术超选择性动脉栓塞治愈２例血管搏动怀耳鸣，并就发病原因、机理、治疗措施、临床特征进行讨论。     

PACS系统架构与数字化医院建设

目的探讨在构建图像归档和通讯系统(PACS)中系统构架的设计和实现以及利用PACS实现无胶片化运作的数字化医院.方法PACS系统建设可简单分为规划、实施和运行三个阶段.为了实现医院的无胶片化运作,通过对以下几个方面进行深入的讨论分析:规划阶段的系统结构、配置、功能和接口,实施阶段的工作流程和具体细节以及运行阶段的使用等,进而形成一个行之有效的PACS系统架构.结果基于以上对PACS系统架构的分析,在系统结构上采用前置工作站技术,在功能和接口上符合HL7和DICOM标准接口,在工作流程上遵循IHE体系结构,在运行阶段引入丰富的图像后处理功能,实现了一个有效的PACS系统架构.应用此架构,中山市小榄人民医院实现了彻底的无胶片化运作.结论PACS建设是一项复杂的系统工程,其中PACS系统架构是构建无胶片化运作的数字化医院的关键所在.实际应用结果表明,上述PACS系统架构对实现无胶片化运作的数字化医院是切实可行的.     

Agfa新一代数字X线成像系统DX-S在小儿胸片中的应用

目的：探讨Agfa新一代X线成像系统（DX-S）在儿童胸片应用中的临床价值。方法：选择年龄3-4岁，体重在12-15公斤患儿100名，将这100名患儿随机分成2组，分别使用市场上同级别品稗CR和Agfa DX-S进行胸部摄片．由放射科有经验的医师3名在双盲前提下对这100张胸片进行分析，评价胸部特定的8个解剖区域（周围肺实质、中心肺实质、肺门、心脏、横膈、上纵隔，骨骼和软组织），应用5分指标对所有100张胸片进行胸片质量分析比较，进行统计学分析。并对这100张胸片所用曝光条件千伏（KV），毫安秒（mAs）进行比较。结果 Agfa DX-S图像质量高于该品牌，更有利于诊断，同时Agfa DX-S使用的曝光条件明显低于市场上同类产品。结论：Agfa新一代数字X线成像系统DX-S值得在儿科放射领域推广应用。     

数字减影血管造影在诊治顽固性鼻出血中的应用

目的探讨数字减影血管造影技术在诊治顽固性鼻出血中的应用价值。方法6例顽固性鼻出血患者使用常规方法止血治疗无效后,采用Seldinger技术经皮穿刺法做右侧股动脉穿刺行数字减影血管造影,查明出血部位及责任血管后施行超选择性血管内栓塞治疗。结果6例患者中5例栓塞同侧颌内动脉一次止血治疗成功,另1例经加栓同侧面动脉及对侧颌内动脉而治愈。结论数字减影血管造影是诊断与治疗顽固性鼻出血的一种有效方法。     

应用DITI对中医经络学再认识

目的:应用Digital Infrared Thermal Imaging(简称DITI)红外热像技术探讨针灸一经络原理。方法:选择40名健康志愿者,随机分组为内关穴组、公孙穴组、非内关穴组、非公孙穴组四组,分别在相同条件下相应穴位及非穴位针刺;选用目前国际上比较先进的DITI红外热像仪,在针刺前、针刺即刻,持续行针10 min,留针20～30 min后分别测定脘腹部温度变化,针刺前后各组温差(△T)数据统计处理。结果:内关及公孙穴组针刺前后脘腹部温度差(△T)有统计学意义(P<0．05);而另两组非穴位对照组则没有统计学意异。结论:中医经络腧穴学中八脉交会穴理论中内关、公孙两穴对脘腹部能量有协同调节作用。     

双机容错技术在图书馆网络中的应用研究

介绍了双机容错技术的原理及其在图书馆中的应用，详细说明了双机互备援模式和双机热备份模式的双机客错模式及图书馆中常采用的系统数据镜像技术和共享磁盘技术这两种双机容错方案。     

Digital cutting guide and endoscopically-assisted vertical ramus osteotomy to treat condylar osteochondroma: a long-term study

We have introduced an effective treatment for mandibular condylar osteochondroma with a digital cutting guide and endoscopically-assisted vertical ramus osteotomy (VRO). Eleven patients with unilateral condylar osteochondroma, who did not require orthognathic surgery or had less than 3 mm deviation of the chin and a stable occlusion, were treated during the period April 2013–January 2017 with a digital cutting guide and endoscopically-assisted VRO. Clinical data collected included the occlusion, facial contour, and maximum mouth opening (MMO). Computed tomographic (CT) scans were taken before and after operation. Two patients also had additional shaping of the mandibular contour. The pathological diagnosis was confirmed to be osteochondroma in all cases. A mean (range) 19 (12–40) months of follow-up for all 11 cases showed stable postoperative occlusion and facial aesthetics. There were no functional disturbances, recurrence, or condylar absorption. VRO is an alternative to orthognathic surgery for patients with osteochondroma who do not have severe malocclusions. The digital cutting guide and endoscopically-assisted VRO make it possible to achieve precise resection of the tumour and maintain the occlusion with minimal invasion.