KB-500型X线机C30诊视床3例特殊故障检修介绍

故障现象１：按下床面下降开关，有时限位开关不起作用，松开床面下降点动开关，关断控制台电源后床面仍继续下降，只有断开电源总闸，床面下降才停止。分析及检修：从故障现象上分析，我们怀疑床面下降继电器Ｊ１９有时发生机械性故障，造成Ｊ１９在线圈失电后其常开接点...     

岛津SCT-4800TE全身CT机床面控制板鼠害故障处理一则

我院于 1995年引进一台日本岛津ＳＣＴ 480 0ＴＥ型全身ＣＴ机 ,4年后发生了 1次鼠害致使床面控制电路板出现故障 ,现报告如下。故障现象　开机后操作床面升降键 ,发现床面只下降不能上升。用脚踏开关出现同样的现象。操作床面进出键 ,床面出进断断续续。拆开床裙 ,用手拉动传动带 ,床面能够上升 ,说明机械部分无故障。拆开龙门架与检查床之间电路板外罩 ,发现床面控制电路板小网罩内有一小死老鼠已干枯 ,电路板表面见有污垢 ,检查电路板保险无熔断。经分析 ,可能为老鼠死后 ,分解出一些有害物质腐蚀电路板而造成故障故障处理　 ( 1)去除电…     

MAX640 CT故障维修2例报告

故障现象1开机后,显示错码:ER-122TABLE UNA2VAILABLE00000000,即床面CRADLE开关未闭合或床位置错误,扫描床处于自锁状态。确认床面CRADLE开关正常闭合后,按下控制面板GANTRY PNL上床运动功能键,面板显示床位POSITTION灯及床高HEIGHT灯同时闪烁,扫描床不能进行上下或前后的移动。根据故障现象可以判断,该故障主要由控制面板GANTRYPNL或机架及床控制板TGP引起。本着先易后难的原则,首先检测控制面板。控制面板的检测:按住TGP板上RESET复位键,面板显示灯全灭,松开手后,面板显示灯全部点亮且显示正常,说明控制面…     

XG501A型X线机故障检修二则

故障现象一 其诊视床(709C型)床面上、下移动;荧光屏上、下移动;床身起卧均不能工作,有断断续续、不能持久的继电器吸合声. 故障分析与处理 此机器的床面上、下移动;荧光屏上、下移动和床身起卧的电机都由变频器和三个继电器分级控制,而变频器的触发信号(变相与通断)和继电器的电源都由床动驱动板控制.     

KB—500型500毫安X线机配套装置C_(30)型诊视床少见故障1例检修

1 故障现象 接通电源,按床身及滑架移动钮,其运动自如,按床面板上升按钮K_(2-3)、K_(1-5)及下降按钮K_(2—4)、K_(1-6)时,床面板不移动。     

飞利蒲CT-WT-14P[M]型螺旋CT诊断床故障检修

1　故障现象与控制原理1.1　故障 (1)　诊断床的前进后退指示灯不亮 ,床面不移动。1.2　故障 (2 )　前进后退指示灯亮但床面不移动。该机由直流电机、同轴离合器驱动链条 ;床面与链条之间由电磁铁挂钩锁定 ;床尾有一个控制电磁铁挂钩开关 ;床面下有一条起固定作用也是检测信号地线的钢丝绳。床面位置检测由一个与链条并行的高精度线绕电位器完成 ,输出电压经过模数转换传送给计算机。床面位置精度在 1ｍｍ以下。控制电路见附图。附图　ＣＴ -ＷＴ - 1 4 [Ｍ]型诊断床示意图2　故障分析与排除2 .1　故障 (1)　工作中经常发生 ,原因是计算机检…     

F30-ⅡB型X线机限时电路改进

Ｆ3 0 -ⅡＢ 型Ｘ线机曾是七、八十年代基层医院的主流机型 ,目前有相当数量的该型Ｘ线机仍在继续使用。在多年的维修工作中发现 ,该机限时电路中极性继电器ＪＤ5放电线圈极易发生断路故障 ,既不易修复 ,又不易找到备件 ,给维修工作造成极大不便。为此 ,我们对限时电路加以改进 ,彻底解决了上述问题。改进后的电路 (图 1) ,该电路模拟ＪＤ5的动作过程。图 2是其等效框图 ,由图中的 12、13端子取代ＪＤ5放电线圈 ,ＪＤ5复位线圈取消。继电器Ｊ1的常闭触点Ｊ1-Ｂ取代ＪＤ5的“中”、“左”触点。静止状态下 ,三极管ＶＴ1截止 ,Ｊ1-Ｂ常闭 ,相…     

F99-I型X线机故障检修

1机器工作原理普通摄影时,按下摄影手闸I档,摄影准备接触器JC2得电工作,随后延时继电器JC19得电工作,于是X线管旋转阳极启动,当灯丝电流,旋转阳极启动电流,启动电压均正常时,启动保护继电器J10工作,接通JC3工作回路。松开手闸,高压预上闸继电器JC3得电工作,随后J4得电工作,继电器J4(9,11)接点闭合,接通JC3工作回路。时间限时器开始工作,此时X线发生,当限时终了时,下闸继电器J7、J8、J5工作,切断JC3回路,曝光结束。2故障现象偶有按下曝光按钮时,摄影准备接触器JC2得电工作,X线管旋转阳极不能正常旋转,导致机器不能曝光,无X线产生。…     

北京万东F52-8C透视床故障检修一则

故障现 象开机后,经常出现不能放倒床,必须拉开网电源空气开关约2min后才能正常放床. 故障分析 从线路图可知放床由K52,K53,JC51接点及JC52线圈等串联而成,其中任何一个环节出现故障,均可引起电路不通而不能放床.从时好时坏现象来看,这是一种接触性故障.     

KB——500型X线机点片故障检修

故障:该机在点片摄影时,匣盘前进达摄影位置撞击片架,所摄片影像模糊。 检修:该机点片摄影电路为:按下点片曝光控开关K2,匣盘运行辅助继电器J_0工作,摄影准备电路全部开始工作,点片架被制动,同时匣盘脱勾,匣盘前进控制继电路J4得电工作,驱动匣盘电机D4正转,匣盘往前移动达摄影位置前时,匣盘慢速控制开关被顶合,匣盘慢速控制继电器J5工作,使电机D4馈电电压由24伏降至8伏,匣盘前进速度减慢,致     

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.