Evaluation of an automated superimposition method based on multiple landmarks for growing patients

ObjectivesTo determine if an automated superimposition method using six landmarks (Sella, Nasion, Porion, Orbitale, Basion, and Pterygoid) would be more suitable than the traditional Sella-Nasion (SN) method to evaluate growth changes.Materials and MethodsSerial lateral cephalograms at an average interval of 2.7 years were taken on 268 growing children who had not undergone orthodontic treatment. The T1 and T2 lateral images were manually traced. Three different superimposition methods: Björk''s structural method, conventional SN, and the multiple landmark (ML) superimposition methods were applied. Bjork''s structural method was used as the gold standard. Comparisons among the superimposition methods were carried out by measuring the linear distances between Anterior Nasal Spine, point A, point B, and Pogonion using each superimposition method. Multiple linear regression analysis was performed to identify factors that could affect the accuracy of the superimpositions.ResultsThe ML superimposition method demonstrated smaller differences from Björk''s method than the conventional SN method did. Greater differences among the cephalometric landmarks tested resulted when: the designated point was farther from the cranial base, the T1 age was older, and the more time elapsed between T1 and T2.ConclusionsFrom the results of this study in growing patients, the ML superimposition method seems to be more similar to Björk''s structural method than the SN superimposition method. A major advantage of the ML method is likely to be that it can be applied automatically and may be just as reliable as manual superimposition methods.     

非水电位滴定法测定盐酸莫西沙星含量的方法研究

目的探究非水电位滴定法降发美．分析化学[M]．第6版．北京：人民卫生出版社,2007：152—179．]测定盐酸莫西沙星含量的方法。方法以0．01mol／L盐酸溶液一无水甲醇（1：8）为溶剂,用甲醇钠滴定液（O．1mol／L）进行滴定。结果非水电位滴定法：方法精密度RSD为0．46％（n=9）,平均回收率为100．O％。结论非水电位滴定法的测定结果与高效液相色谱法在统计学上无显著性差异,方法简便快速,结果准确可靠。     

全自动免疫组织化学染色技术的应用

目的：探讨全自动免疫组织化学染色技术在基层医院的应用。方法：随机选取常见肿瘤50例,经包埋、切片后分为2组,分别采用全自动免疫组化机与手工操作2种免疫组化染色方法,显微镜下观察染色结果。结果：免疫组化机染色的组织定位准确,染色强度强,背景清晰,未见切片边缘着色现象。而手工染色虽然组织定位准确,但染色强度强弱不一,背景不清晰,存在非特异性染色,切片边缘着色现象较多,两者比较有显著性差异,均P〈0．05。结论：全自动免疫组织化学染色技术比手工操作染色效果好,易于做到染色标准化。     

自动痔疮套扎术(RPH)治疗轻中度痔疮

目的研究自动痔疮套扎术(RPH)治疗轻中度痔疮的临床疗效.方法应用自动痔疮套扎器对156例轻中度痔疮患者施行自动痔疮套扎术,观察手术疗效、并发症和病人满意度.结果共施行套扎治疗287例次,平均每人1.8次.术后全部患者的痔疮症状均有不同程度的好转,其中症状完全消除者143例(91.7%),以便血为主要症状者术后便血全部停止.术后主要不适有急便感或坠胀感51例(32.7%);术后痔块回缩不全8例(5.1%);无出血、感染、肛门狭窄等并发症.问卷调查病人的满意度,表示满意者149例(95.5%),基本满意6例(3.9%),不满意1例(0.6%).结论RPH对轻中度痔疮不仅具有极好的疗效,而且无需麻醉和住院,操作简便,术后痛苦轻微,几无并发症,病人满意度高.     

自动痔疮套扎术结合外痔切除术治疗混合痔患者的临床疗效研究

目的：探讨自动痔疮套扎术结合外痔切除术治疗混合痔患者的实际效果。方法随机选取2012年6月—2014年6月该院收治的混合痔患者50例,按硬币法将其分成实验组25例,对照组25例,实验组联合应用自动痔疮套扎术、外痔切除术治疗,对照组应用外切内扎术治疗,比较两组混合痔治疗效果。结果实验组混合痔治疗有效率为100.0%,与对照组的96.0%相比,差异无统计学意义;实验组尿潴留、术后出血、肛门直肠狭窄并发症发生率为12.0%,与对照组相比,差异有统计学意义（P<0.05）。结论自动痔疮套扎术结合外痔切除术治疗混合痔患者,效果满意,值得临床进一步应用、推广。     

自动痔疮套扎术在门诊痔病手术的应用（附86例报告）

目的观察和评价自动痔疮套扎术在门诊痔病手术中的疗效。方法对门诊病人中86例Ⅱ-Ⅲ度内痔或混合痔采用自动痔疮套扎术进行回顾性分析,并对其手术时间、并发症及疗效进行评价。结果手术平均时间12．3min;6例出现并发症;78例1次治愈,5例残留外痔,经手术切除后痊愈,3例残留内痔,2经硬化剂注射、1例经保守治疗后痊愈。结论自动痔疮套扎术操作简单,创伤小,疗效确切,在门诊施行是安全可行的。     

双突跃电位滴定法测定壳聚糖脱乙酰度的影响因素

研究了双突跃电位滴定法测定壳聚糖脱乙酰度的准确性以及壳聚糖溶液质量浓度、粘度、不同脱乙酰度等因素对滴定终点测定结果的影响.结果表明:壳聚糖样品质量浓度控制在2～6g/L,利用双突跃电位滴定法可以测定壳聚糖的脱乙酰度,不同样品脱乙酰度测定结果RSD(相对标准偏差)小于0.61%(n=3),该方法具有较高地准确性,可以用于壳聚糖生产和加工过程中的质量控制与检测.     

Fully Automated Muscle Ultrasound Analysis (MUSA): Robust and Accurate Muscle Thickness Measurement

Musculoskeletal ultrasound imaging allows non-invasive measurement of skeletal muscle thickness. Current techniques generally suffer from manual operator dependency, while all the computer-aided approaches are limited to be semi-automatic or specifically optimized for a single muscle. The aim of this study was to develop and validate a fully automatic method, named MUSA (Muscle UltraSound Analysis), for measurement of muscle thickness on longitudinal ultrasound images acquired from different skeletal muscles. The MUSA algorithm was tested on a database of 200 B-mode ultrasound images of rectus femoris, vastus lateralis, tibialis anterior and medial gastrocnemius. The automatic muscle thickness measurements were compared to the manual measurements obtained by three operators. The MUSA algorithm achieved a 100% segmentation success rate, with mean differences between the automatic and manual measurements in the range of 0.06–0.45 mm. MUSA performance was statistically equal to the operators and its measurement accuracy was independent of the muscle thickness value.     

放射性药物自动分装仪装置设计

随着我国医疗事业尤其是核医学事业的迅猛发展,大量的核医学设备在被广泛地应用到医疗实践的过程中,该类设备检查用核素的种类及数量越来越多。相关放射工作人员在使用核素时需要对其进行分装,基本采用手工分装方式。这种长时间在辐射环境下的工作必然给相关医疗工作人员的健康带来危害。如何预防辐射成为关注的焦点。本文基于此,设计了一种放射性药物自动分装仪,它由PLC控制整个系统,由步进电机、触摸屏伺服电机、气动元件附以一定的机械装置构成,能够对临床所需的核素剂量进行精确的分装,降低了工作人员接受辐射的强度,有效地解决了辐射问题。