Picker 1200 Exper型CT机特殊故障一例

故障现象　开启扫描架，瞬间可听到清脆的噼叭声，扫描架动作正常，状态显示均无异常，高压加电预热完成后，空校或扫描操作台出现错误２或１３并伴随急促的噼叭声。分析与检修　ＣＴ机硬件主要包括Ｘ线发生系统、扫描系统、计算机系统，在高压柜上Ｌｏｃａｌ伴曝光正常，结合声音来自于电子柜交流控制部分，可以断定故障在遥控电子柜上。将发出噼叭声的继电器Ｋ１０７、Ｋ１０３更换后，故障现象无变化，表明问题可能在控制电路部分，测量控制电源，输入单相１２０Ｖ交流电正常。但测输出时发现电源端值为５．１２５Ｖ，而在负载端仅为４．…     

PICKER 1200 SX全身CT机故障检修2例报告

设备出现故障 ,产生原因很多 ,尤以电子元件损坏较为常见。本文叙述 2例较为特殊 ,皆因保险丝长度不足而引起。例 1　启动扫描程序 ,命令不能执行 ,操作台显示屏出现“ＥＲＲＯＲＮＯ .14”回车 ,重新启动 ,故障依旧。检查 :听到电子柜内有“啪啪”的打火声 ,打开电子柜发现电子柜ＡＣｃｏｎｔｒｏｌｐａｗｅｌ板上Ｋ10 8继电器打火 ;维修车上出现错误数字不能清除 ;伺服挂不上。把两个同样型号的继电器Ｋ10 6和Ｋ10 8调换 ,发现调换的Ｋ10 6仍然打火 ,说明故障不是出在Ｋ10 8本身。检查Ｋ10 8的控制继电器ＳＳＲ112 的输入、输出 ,发现输入…     

CT机扫描架脉冲电路故障的检修

故障现象 CT机扫描中断,重启数次仍然不能正常运行.错误日志显示(Error log):11-1002-0E. 故障检修及分析 重启扫描架电源后,继电器正常上电.选择轴扫方式,点击扫描键,扫描架旋转,曝光灯不亮.点击结束扫描后,发现扫描架仍然转动,较正常时延长3～5s,扫描架停止转动,报错:11-1002-0E(图1).笔者根据手册分析,当轴扫时,扫描架是在0°或180°初始化,而系统是通过方位编码器和扫描架脉冲1识别方位角.     

西门子Esprit T螺旋CT故障维修一则

故障现象 当开启整个系统,程序进入用户界面时,出现"机架启动失败"错误信息.扫描架两侧控制面板上的操作按钮没有亮起,床水平、垂直位置以及机架倾斜角度都是"8888"显示.     

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...     

西门子OPEN型磁共振机射频部分故障分析排除

1　故障现象在 T1 序列扫描过程中经常出现扫描中断或在扫描结束时出现噪声图像 ,计算机当前状况显示 RFPA(射频功放 )差错 ;T2 序列扫描正常。2　故障分析排除系统故障诊断报告显示 :RFPA没有工作或工作在线性范围之外 ,要求重新装入序列 ,参数再执行。根据报告上要求重新执行之后 ,故障依存。观察射频控制柜 ,发现诊断指示灯 OVLLED,RFD PWRLED和 VDC HILED亮。按 RFPA上 RESET(复位 )即 RFPA控制电源关断又重开 ,诊断指示灯恢复正常。重新扫描 ,观察 RFPA上的功率表 ,发现输出功率为 50 %左右 ,而正常显示应为 1 5%…     

CT机因地线损坏引发的故障报告

ＣＴ机因地线损坏引发的故障报告刘蜀宁我院有一台美国△２０２０型ＣＴ机，该机运行一直正常，自１９９４－１０起频繁发生故障。ＣＴ机扫描正常，但晶体探测器所采集到的扫描信号在进入磁盘的途中时常报错，造成８０ＭＢ磁盘接收数据的不完全，无法正常工作。在启动诊断...     

GEPSS00数字胃肠机故障分析一例

故障现象：开机后工作站不能正常启动且扫描床无电源指示。     

源准直器位置传感器的应急修复

一、故障现象Ｐｉｃｋｅｒ1200ＳＸ型ＣＴ机扫描中断并提示:ｈａｒｄｗａｒｅｓｅｑｕｅｎｃｅｔｉｍｅｏｕｔ、ｅｒｒｏｒＤ。此类故障较常见为快门(ｂｅａｍｓｈｕｔｔｅｒ)、滤线器(ｂｅａｍｆｉｌｔｅｒ)、补偿器(ｃｏｍｐｅｎｓａｔｏｒ)、源准直器(ｓｏｕｒｃｅｃｏｌｌｉｍａｔｏｒ)、光圈(ａｐｅｒｔｕｒｅ)等硬件损坏或动作失常。二、检查与维修上述硬件的动作信号均在电子柜的ＤＳＡ3(ｄｒｉｖｅｓｓｅｑｕｅｎｃｅａｌａｒｍ)驱动时序报警电路板的插Ｊ11的Ｂ42～Ｂ49的各点上。正常状态下上述各点应为低电平(约0Ｖ),但检查发现其…     

GE SIGNA0.5T磁共振数据采集故障和处理三例

故障1 行常规头部扫描;扫描程序正常,但采集不到正常数据,呈现整幅噪声图像.查阅故障信息找不到任何提示,由此分析可知射频及梯度部分工作正常,软件采集系统工作正常,线圈(头正交线圈)系统接口识别正常,也不属于通常的干扰信号.     

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.