飞利浦DR图像处理计算机工作原理及软件安装

目的:为减少飞利浦DR图像处理计算机停机时间,排除飞利浦DR图像处理计算机的软件故障.方法:通过介绍飞利浦DR图像处理计算机的硬件结构及工作原理,详细描述图像处理流程,讲解软件安装和校准方法,解决安装过程中所遇到的各种问题.结果:通过优化后的安装方法,可以快速排除软件故障.结论:医院医疗仪器维修工程师通过研究技术资料,不断总结经验,可以对大型医疗设备进行维修     

Asteion/VF螺旋CT高压故障分析与维修

故障现象开机后进行预热,显示over kV,其详细错误为3f373c3f3f3f3f3f3f2f2f2f2f2f00,查看错误代码为HFG ERROR。故障分析与维修打开机盖,发现Convertor箱子内XP WB第2、9红灯亮,RESET后扫描,故障依旧。由于高压其他故障维修过Convertor箱子,怀疑电缆接触不良,检查电缆并无异常,故障依旧。仔细分析电路图(电路图如下),over kV信号来自HVtank通过CNN6与XP连接,检查这根电缆RXS10,用万用表测量每个插孔之间连接,无异常。在电路图中,TP12:Tube voltage detectionTP13:Over kV detection level曝光电压通过分压电路经过CNN6进入…     

日立EUB-240 B超诊断仪故障分析方法及维修二例

维修工作开始前应具备的条件,首先应系统了解仪器各部分组成的工作原理.通过研究该型号仪器的维修手册及电路图,如能在了解电路图原理的基础上进一步获得仪器的正常工作状态下的典型参数,如主要信号波形和电路各点电压,将更有助于故障原因的查找和排除.     

SJN2032型B超的故障维修

现在很多仪器都缺少电路图，这无疑给维修带来很大的困难，使人往往无法下手。但这并不是说无电路图就不能维修，只要凭借经验及正确的方法和技巧，仍可以解决一些问题。下面的故障就是在无电路图的情况下，一步一步解决的。故障现象通电开机后，只听“吱”的一声，屏幕无...     

浙大FWZ-50C6注射泵电源板电路图分析及典型故障处理

介绍注射泵电源板的工作原理,分析各部分电路工作原理,对电路板的常见故障维护及维修。根据电路板上的元器件大概画出电源板的电路图,根据电路图分析各个部分电路工作原理。只有真正的掌握电路的工作原理,才可以有效快速的将故障修复。     

临床医学工程师处理医疗设备故障的常用方法

目的:结合具体医疗设备故障处理过程中常见问题,提出经验性维修步骤及建议,总结常见医疗设备故障处理方法.方法:通过临床工程师对医疗设备故障处理过程的分析,总结相关有效的维修方法,并提出相关建议和有效的故障排除方法.结果:指出了医疗设备故障处理的一般维修步骤,提供了卓有成效的常用故障处理的诊断与维修方法,成功排除了医疗设备故障.结论:实践证明简洁的故障处理步骤是保证维修安全有效的基本保证,选用正确的检修方法可以使维修工作事半功倍     

MRI射频系统故障检修与分析

掌握核磁共振仪射频系统的最佳维修方法,结合电路图进行电路分析,缩小故障范围,查出故障部件,进行更换并快速修复。     

国产西安5401(Ⅱ)型电视系统故障的维修

维修人员必须清楚X线电视系统的原理,熟悉电路图,不能凭经验进行乱拆调,这样有可能扩大故障的范围,给以后的维修工作带来困难.     

ALISEI全自动酶免分析仪驱动电机故障的检修规律

目的:ALISEI全自动酶免分析仪具有开放、高速、自动化的性能和特点,将构造和使用上的规律应用于维修,可准确判断并排除故障.方法:通过案例的分析及对结构的观察,总结维修规律.结果:通过2例维修分析,ALISEI全自动酶免仪驱动电机位置较低易引发其他故障.结论:由于ALISEI全自动酶免分析仪驱动电机位置的特点,维修时应先由测量电机参数开始而后判断控制板,可以避免维修误判引发更多故障     

利用指示灯巧修车载X射线机机架

S2001型x射线机配备的透视摄影架，可以实现立、卧位的透视、摄影以及胸片摄影。笔者通过多年维修x射线机的经验，发现其故障大多出在透视摄影架上。但如果了解了机架控制板（MCU板）上各指示灯的意义，维修起来有事半功倍的效果。结合电路图对透视摄影架故障概括总结如下：     

GE light speed 16排螺旋CT常见故障的维修和体会

多排螺旋CT目前已广泛应用于临床,使用过程中会遇到各种各样故障,在熟练掌握多排螺旋CT的基本原理,工作结构,及相关计算机知识的基础上,可以对多排螺旋CT机很多常见故障进行快速及时修复,大大提高了设备使用率,保证临床工作的顺利进行。本文简要阐述了我院GE light speed 16排螺旋CT在使用过程中常见的故障现象、诊断分析、解决方法和体会。为相关专业技术人员提供一定的参考和借鉴。     

A new software for dimensional measurements in 3D endodontic root canal instrumentation

The main issue to be faced to get size estimates of 3D modification of the dental canal after endodontic treatment is the co-registration of the image stacks obtained through micro computed tomography (micro-CT) scans before and after treatment. Here quantitative analysis of micro-CT images have been performed by means of new dedicated software targeted to the analysis of root canal after endodontic instrumentation. This software analytically calculates the best superposition between the pre and post structures using the inertia tensor of the tooth. This strategy avoid minimization procedures, which can be user dependent, and time consuming. Once the co-registration have been achieved dimensional measurements have then been performed by contemporary evaluation of quantitative parameters over the two superimposed stacks of micro-CT images. The software automatically calculated the changes of volume, surface and symmetry axes in 3D occurring after the instrumentation. The calculation is based on direct comparison of the canal and canal branches selected by the user on the pre treatment image stack.     

Determination and Successful Transfusion of Anti-Gerbich-Positive Red Blood Cells in a Patient with a Strongly Reactive Anti-Gerbich Antibody

Background: The clinical relevance of antibodies directed against members of the Gerbich (GE) family of antigens is not invariably clear. Given the scarcity of serologically compatible red blood cells (RBC), various methods may have to be applied to assess the safety of transfusing serologically incompatible RBC. Patient and Methods: The serum of a 57-year-old male Caucasian admitted to hospital for gastrectomy was found to contain a highly reactive anti-GE2 antibody (IgG(1)). In addition to a monocyte monolayer assay, 50 ml of GE2-positive RBC were transfused, and blood samples were taken before and 1 and 24 h after transfusion for flow-cytometric determination of transfused cells. Results: Both tests showed no increased destruction of GE2-positive RBC. The transfusion of 4 units of GE2-positive RBC was well tolerated, and hemoglobin increased adequately. Conclusion: This case may extend the information available not only on antibodies directed against members of the GE family of antigens but also on methods to estimate the survival of transfused RBC. Copyright 2000 S. Karger GmbH, Freiburg     

Diagnostic and therapeutic management of patients with chronic inflammatory bowel disease

BACKGROUND: The period of time required for the diagnosis of a chronic illness depends on initial clinical symptoms and their perception by the patient and the physicians. The aim of this study was to describe the procedures of diagnosis of incident cases of Inflammatory Bowel Disease (IBD). METHODS: Patients reported by the Registry of inflammatory bowel disease of northern France (EPIMAD) in 1994 were included. Standardized questionnaires describing clinical history, patient behavior, medical consultations and examinations were collected by an interviewer practitioner from three sources: patients, general practitioners (GP) and gastroenterologists (GE). Patients were divided in 2 groups according to the time between symptom onset and diagnosis: more than 9 months or less than 9 months (D > 9 and D < or = 9). RESULTS: 258 patients were included: 144 Crohn's disease (CD) (56%), 106 ulcerative colitis (UC) (41%) and 8 chronic unclassifiable colitis (CUC). Median time between symptom onset and diagnosis was 3 months, 196 (76%) patients belonged to the group D < or = 9 and 62 (24%) to the group D > 9. There was no difference between the 2 groups for initial clinical symptoms. The delay between symptom onset and the consultation to the GP and the GE was longer in the group D > 9: respectively 1 month vs 0 and 7.6 vs 2. Thirty-five percent of patients in the group D > 9 had consulted more than one GP vs 14% (p < 0.05). Diagnosis management by the GE was the same in both groups. Patients of group D < or = 9 had more often perceived their symptoms as serious (p < 0.05). CONCLUSIONS: Delay to diagnosis in a quarter of patients with IBD was more than 9 months. This later diagnosis was not due to patient management by the GE but rather to a longer delay to consulting the GP and between GP and GE referral. Patient interpretation of the symptoms could also explain the variability of this delay.     

Moog Curlin 6000 CMS infusion pumps may falsely indicate hardware failures and stop therapy

Due to a software issue, the Moog Curlin 6000 CMS infusion pump may activate an error code associated with a hardware failure (error code 45) when no such failure exists. When this occurs, the unit will stop infusing, and the user may be unable to restart it. Moog has announced plans to release new software in the coming weeks to address this problem. Until the software is available, facilities whose units exhibit this error code should contact Moog for guidance.     

比较两种自动化免疫分析仪对血清25-羟维生素D的测定

目的 比较Architect I2000和DiaSorin LIAISON两种自动化免疫分析仪对血清25-羟维生素D［25(OH)D］测定的相关性及差异，为临床诊疗提供参考依据。方法 根据美国临床实验室标准化委员会（NCCLS）的EP9-A2文件，分别在两个系统检测三个水平（L1, L2, L3）的25(OH)D质控品，通过Excel 2007软件分析两个系统测定25(OH)D的不精密度。收集266份临床样本进行25(OH)D检测，将样本分成两份在本实验室Architect I2000和DiaSorin LIAISON系统同时进行检测。采用MedCalc软件进行统计学分析，以Passing-Bablok回归和Pearson相关系数分析两种方法测定结果之间的相关性，以Bland-Altman比较它们之间的差异。结果 在不精密度评估中，两个系统（DiaSorin LIAISON vs Architect I2000）三个质控水平（L1, L2, L3）的总不精密度分别为L1: 8.86% vs 7.89%，L2: 5.82% vs 4.67%，L3: 6.66% vs 5.71%。Passing-Bablok和Pearson分析显示Architect I2000和DiaSorin LIAISON间相关系数为r=0.98。Bland-Altman分析结果显示，Architect I2000检测的25(OH)D比DiaSorin LIAISON的平均高7.2ng/ml，随着25(OH)D的增高，两者的差值越来越大，最大差值可达43.3ng/ml。结论 Architect I2000和DiaSorin LIAISON两个系统检测的25(OH)D相关性较好。Architect I2000精密度优于DiaSorin LIAISON，Architect I2000系统得到25(OH)D的结果更为准确，与临床诊断更相符。     

网络版设备维修模块的研发与应用

目的:提高设备维修效率和效益;方法:利用Intranet网络资源、运用ASP语言,开发动态数据库网站软件;结果:服务器通过Intranet,收录了故障设备的关键信息,促进了使用人、维修人、厂家、管理人员对维修工作的共同配合;结论:网络版维修模块的使用,可控制维修费用支出、跟踪重要设备维修进度,对没有保修合同的设备尤其重要.     

基于Cine扫描的4D—CT图像重建系统设计研究

为了在普通多螺旋CT上实现4D—CT重建,研究中采用VC＋＋程序设计语言和模块化的程序设计方法,开发了基于Cine扫描的4D—CT图像重建系统。利用本系统,根据体表轮廓和肺组织的体积变化确定CT图像在呼吸周期中的相位,按相位分组排序后,实现4D—CT重建,其重建过程不依赖于外在的呼吸监测装置、不受Ct机本身的软硬件限制,具有普遍适用性。     

The commissioning and acceptance of a commercially manufactured radiotherapy beam tissue compensating filter system

The principles of tissue compensation in radiotherapy and the methods for their implementation on the GE RT/Plan computer are briefly described. The HEK Medizintechnik GmbH Medical Systems Tissue Compensator cutting device is described, along with the testing procedure adopted for its commissioning and quality assurance testing of the total system. The HEK machine hardware proved to be well engineered, but there were many deficiencies in the software supplied to interface it to the planning computer. Most errors were fatal to the program producing a compensator but a number of errors allowed the cutter to manufacture shapes which on close inspection turned out to be incorrect. These faults were traced to incorrect algorithms and/or incorrect software implementation. It is stressed that the software errors were entirely the responsibility of HEK and that the GE equipment and software were not deficient in any way. However, the experiences of the Adelaide group suggest that caution should be exercised when purchasing two pieces of interacting equipment from separate suppliers.