对KB—400型X线机二例较少见故障的检修

例一、故障现象:当S_2为上球管位,按下电源“通”按钮S_1时控制台得电,旋转阳极不受摄影准备继申器PBR控制,旋转阳极自行运转,球管壳带电。检修方法与程序:按照检修机器步骤,把高压初级接线P_1P_2拆下,将PC平床电源线及滤线器、聚光器电源线全部拆下,机器得电故障仍然存在,分析故障现象为线圈与球管壳短路。将电缆拔出,取下球管,打开管窗,倒出     

GX——200型X线机一起罕见故障

故障现象: XG—200型X线机在一次摄片后由于操作失误,技术选择开关未按下透视用的按键,就做胸部透视,踏下脚开关透视继电器TC“似乎正常”工作,但无X线,却发现上球管曝光,松开脚开关,上球管曝光停止,但旋转阳极未启动。     

用错三极管致X线机球管损坏

Ｘ线机的结构较为完整 ,各元器件间相互联系。在维修时 ,必须从整体出发以免因错用某一元器件 ,虽暂时运转正常 ,久之可能会造成更大的损失。最近 ,我们遇到因用错了三极管 ,导致Ｘ线球管损坏的现象。1　故障原因及维修步骤某部一台车载Ｆ 78Ⅱ型 ( 30 0ＭＡ)Ｘ线机 ,更新了一只ＸＤ51 -2 0·4 0 / 1 2 5球管 ,使用了 3个月就损坏了 ,送我所查找故障原因。我们将球管拆开后用专用试验仪器检查发现 ,球管灯丝、阳极旋转正常 ,阳极靶面已被打熔 ,有数个熔坑。从这些现象看 ,基本可以认为球管本身质量无问题 ,而是机器故障 ,很可能是在阳极未旋…     

GMM OPERA T2000 DR故障的检修

1故障现象无法调节焦片距,系统提示“43”故障,重新开机后正常。一次重新开机后,提示“99”故障代码,无法正常曝光,紧急开关工作,床控部分控制板上各项均无法调整。2故障分析查看操作手册知“43”表示带动球管动作的“马达 发电机/控制”故障。“99”为待机状态。故分析:为“马     

DFW-10B X线机球管移动电机电容击穿故障分析

故障现象　东芝ＤＦＷ -10Ｂ 5 0 0ｍＡＸ线机 ,球管上下移动电机不工作。检查发现电机过热 ,启动电容击穿烧坏 ,更换启动电容 ,电机暂时恢复运转 ,但时常出现嗡嗡噪音 ,工作几天故障现象重复出现 ,几次更换电容和加大电容容量 ,未解决根本问题。分析检修　从故障现象分析 :( 1)运行轨道机械阻力大 ,加大电机负荷或电机本身有问题 ,旋转阻力大 ,检查轨道无异常断电手动轨道无阻力 ,分离传送带 ,电机通电空载运转 ,电机照常发出噪音。打开电机检查 ,电机转动自如 ,离心开关也无异常 ,此机无机械故障。 ( 2 )电机供电和控制启动电路故障 ,分析…     

北京万东F-IIIAT型500 X线机故障维修一则

故障现象 按下曝光手闸开关,控制台内有“吱吱”声,X线时有时无,X线图像时而清晰时而不清。故障分析 打开控制台,发现“吱吱”声是由于X线管旋转阳极电路的继电器吸合不牢所致,造成X线时有时无。正常情况下曝光手闸按下时,旋转阳极电路得电工作,旋转阳极开始旋转,由于旋转阳极启动的电流较大,使串联在电路中的启动电流继电器LJ很快吸合,接通曝光电路便产生X线。     

PickerIQ—PrimerCT机误疑球管故障的检修

一、常见故障现象整机启动后，输入扫描指令均正常，但旋转阳极刚启动，扫描即被中断，对话屏提示“１０１０”的错误代码。二、原因分析调用诊断软件“ｅｒｒｏｒｌｏｇｇｅｒ”，当查到“１０１０”错误信息是“无运行反馈”时，应该考虑以下五种部件的故障：（１）球管...     

岛津XUD150L-30F高压发生器故障维修一则

故障现象 透视无反应,普通摄影ready(预备)灯不亮,旋转阳极启动板STARTER-4有继电器动作,可闻及球管旋转音.无故障代码提示. 故障检查(1)按SYSTEM-L30F板上的曝光键,故障现象如前,排除曝光手闸的问题.(2)观察ANALOG-L30F板上的OKF灯(绿色,灯丝预热正常指示)不亮,所以先不用怀疑球管.因为开机系统会检测到灯丝预热是否正常,开机时球管灯丝即亮,所以正常时OKF灯亮.(3)检查ANA-LOG-L30F板上JM3到油箱上mA DETECTOR-96板上的JM3的情况,导通完好(JM3即3芯线:C0、CL、CS).测量ANALOG-30F板和mA DETECTOR-96板上的C0-CL C0-CS均有电压,说明ANALOG-L30F板供给邮箱的C0\CL\CS正常.     

美国Marconi产螺旋CT（型号sele CT／SP）故障检修1例

故障现象 在扫描过程中突然终止曝光，然后再行反复试机扫描仍不能曝光。分析检修操作显示屏上无曝光提示，考虑是否为高压回路未准备好，在操作面板系统上进入SCU（系统控制单元）行模拟扫描发现热循环单元错误（代号为1）。说明本机的AMS（球管旋转阳极、散热风扇、油热循环泵）模块或热循环油箱的故障可能性大，再进一步检测发现AMS上的4A、10A保险同时被烧毁，此时更换保险后，试机扫描曝光恢复正常。而在进行2个病人扫描检查后，再次出现不曝光现象。     

德国西门子AR.SP型螺型CT机球管故障检修

我院 1994年引进德国西门子AR .SP型螺旋CT机 ,球管曝光近 5 0万次 ,出现 1次球管故障 ,现将故障的检修过程介绍如下。故障现象　扫描中曝光出现暂停 ,机架指示灯灭 ,RESET复位无效。System -Logbook中查故障代码为〈EX 2 82b〉。故障分析　通过故障代码知道是流速问题 ,正常时频率应该为 8Hz。产生原因 :①球管供电系统故障 ;②油流速测量装置故障 ;③电路板D2 8故障 ;④控制电路板D2 7故障 ;⑤球管冷却系统中油泵不工作。故障检修　 (1)检查供电系统DC1,DC2电压。测量ACS手册中XRS测量点上DC165 0V ,DC2 2 4V。检查机架上F2…     

Optimization of the system of medical service of students of Cadet Schools of the Ministry of Defense of the Russian Federation

One of the factors of the successful military career guidance Cadet schools students is preserving and promoting their health. Medical support of children and adolescents aged 10-17 years should include the full range of medical and preventive measures defined for this group. The state of providing outpatient care for pupils at the Cadet School in St. Petersburg was studied. These results show that full medical care in accordance with the standards can be based only on children's health clinics. It is important that the organization of medical support pupils cadet schools should be cooperate with civilian health care.     

带状疱疹83例误诊原因分析

带状疱疹是由水痘—带状疱疾病毒引起的皮肤科常见疾病。其主要的病理损害,一是受累神经的严重炎症性浸润,继而导致受侵犯神经节内神经细胞变性、坏死;二是皮肤的水泡。迅速抑制神经节和相应的感觉神经纤维的充血、水肿和坏死,防止粘连形成,达到迅速镇痛、改善皮损,缩短病程及防止后遗症的发生是治疗的关键。因而,尽早明确诊断,     

Estimation of accumulated dose of radiation by method of ESR-spectrometry of dental enamel of mammals

ESR-spectrometry was used to investigate radiation-induced paramagnetic centers in enamel of mammals: carnivores (polar bear and fox), ungulates (reindeer, European bison, moose), and man. Values at half the microwave power saturation of the radiation signal, P_1/2, evaluated at room temperature, was found to range from 16 to 26 mW for animals and man. A new approach to discrimination of the radiation induced signal from the total ESR spectrum of reindeer enamel is proposed. ‘Dose-response’ dependencies of enamel of different species mammals were measured within the dose range from 0.48 up to 10.08 Gy. Estimations of ‘radiosensitivity’ enamel of carnivores and ungulates showed good agreement with radiosensitivity enamel of man by ESR method.     

Analysis of the results of the international comparison of activity measurements of a solution of Fe

The results of an international comparison of activity measurements of a solution of ⁵⁵Fe organized by the BIPM in 2005 are reported and analysed. This exercise, which follows the procedures of the CIPM mutual recognition arrangement to update older comparisons, is a renewal of the comparison organized by the BIPM that took place in 1978. A EUROMET comparison was organized in 1996 specifically to compare activity measurements of a ⁵⁵Fe solution by means of liquid-scintillation techniques. Results of these three comparisons are presented and discussed in this paper.

The radionuclide solution was provided by the NPL, which also distributed the samples to the participants. The activity of the ampoules was measured by 16 laboratories using 12 methods producing 25 results. Some general considerations on uncertainty assessments pertaining to the different techniques used are drawn. The outcome of four different estimators is compared from which the presence of at least one outlier can be confirmed. Further measurements should be made to try to reduce the discrepancy between the results. To date the outcome of the present comparison does not show an improvement to that of the 1996 comparison.     

Evaluation of the results of various technics of non-surgical therapy of varicocele

A new method of non-surgical treatment of varicocele syndrome is described: it consists in sclerotherapy of spermatic vein by trans-femoral percutaneous catheterization with balloon-catheters. In 8 cases venous thrombosis has been induced by direct electric clotting. The techniques and a 6 months follow-up are discussed. It is pointed out that this procedure should be considered as the method of choice for tubular lesions and sub-fertility prophylaxis in young people and in childhood.     

延迟性脾破裂误漏诊原因分析

目的探讨延迟性脾破裂误漏诊原因和预防措施.方法回顾性分析总结12例延迟性脾破裂中的诊断和误漏诊的经验与教训.结果本组延迟性脾破裂的误漏诊5例(41.66%).对多发伤与脾破裂并存可能认识不足,外伤史轻微或伤员隐瞒外伤史,缺乏腹痛-缓解-突然再腹痛的典型病史,缺乏“对冲性脾破裂”力学分析和整体化诊断思路等为其误漏诊的主要原因.结论详细的外伤史和全面系统检查,重视腹以外多发伤掩盖腹内脏器伤及延迟性脾破裂可能.确立外伤-腹内脏器伤-脾破裂整体化诊断思路.不间断地辅以B超检查脾形态学变化和腹内有无积液,腹腔穿刺确定有无血腹、X线胸腹部检查观察左侧胸肋角和膈肌运动情况、必要时CT检查以尽早发现脾包膜下血肿,降低延迟性脾破裂误漏诊率.