GEHispeed NX／i螺旋CT机故障检修三则

故障现象一CT检查床脚踏开关不工作,检查床不动。扫描架手动面板开关可工作。故障分析CT机能正常扫描,图像处理正常,机架正反倾斜角度正常,机架的手动面板控制床的上下进出运动正常,说明故障应局限在控制检查床进出的步进马达或脚踏开关控制扫描床进出的电路上。故障维修经过反     

岛津SCT-3000TX型CT机扫描床只出不进故障一例

一、故障现象我院 1台岛津ＳＣＴ 30 0 0ＴＸ型ＣＴ机的扫描床曾出现 1次特殊故障 ,无论按下床控制面板上的进床按键还是出床按键 ,或改用软件控制 ,床面均高速向外运行 ,且每当床向外走到尽头时 ,控制台上扫描床水平位置显示数码管显示紧急呼救信号 ,蜂鸣器报警。二、故障分析及检修根据以往经验 ,显示紧急呼救信号作者单位 :843 0 0 0新疆阿克苏地区第一人民医院ＣＴ室表示床控制电路电源故障 ,当更换电机驱动电路板上熔断的保险后 ,测量其直流± 2 4Ｖ、直流± 15Ｖ电源均正常 ,但运行时故障依旧。对电机驱动电路板上有关扫描床平移电机…     

KB-500型X线机C30诊视床故障检修

故障现象 1　诊视床直立透视时 ,开机后床面自动上升。按下床面下降开关 ,床面下降正常 ,但松开开关后 ,床面又自动上升 ,即关机检查。分析及检修　我们在仔细研究床面上升控制电路后 ,分析造成床面自动上升的原困可能是 :①床面上升继电器Ｊ18由于铁芯剩磁等原因造成线圈断电后 ,衔铁不能及时复位而使其常开接点不能断开→电机Ｄ2 继续得电。②床面上升点动开关Ｋ2 -3(在点片架上 )或Ｋ1-5(在床身上 )两侧接线短接在一起 ,使床面上升继电器Ｊ18不经过此两开关点动控制 ,开机后就得电工作。③Ｋ4 -10 、Ｋ4 -11开关至少有一个处于闭合状态 (…     

GE LightSpeed 16螺旋 CT 机故障维修

1 故障现象
　　正常开机后,CT 扫描机架上的显示面板没有任何显示。
　　观察故障表面现象：发现2块扫描机架的控制面板,仅RESET 绿灯常亮,而扫描机架 GANTRY 的风扇旋转正常,输入测试115 V 也无异常。重新系统开机,扫描机架的控制面板上 RESET 绿灯出现不停闪烁,提示操作台和扫描机架间正在建立通讯,待开机完成后 RESET 绿灯即处于常亮状态。     

GE Hispeed DX/I螺旋CT低压滑环故障维修

故障现象CT开机后,软件在自检过程中,显示扫描球管的高压及灯丝电流为零,扫描定位灯不亮,但扫描床能正常升降,扫描架能正常转动。故障分析打开PDU的顶盖,发现三相380V的供电电路的3个熔断器已烧毁,115V电压的空气开关跳闸。在断电情况下,测量向扫描架供380V电压的3个线线间的电阻,发现阻值非常小,而测量向扫描架供115V电压的2个输入端的电阻,阻值较大,现在断开380V供电线路,闭合115V电压的空气开关,开机,CT扫描定位灯亮,扫描架能正常转动,扫描床也能正常升降。从以上判断,故障可以初步锁定在球管供电电路上。GE HispeedDX/I的PDU是…     

GE Lightspeed Ultra多层螺旋CT床面运动故障分析及检修

故障现象机器正常开启后,运行时床面移动异常,机架板面不能正常显示床面移动数值,而显示"88888"不变数字.退出床面时,不能完全退到底,床向下降时只能降至中间不能降到底.最后床面不能移动不能扫描.     

GE9000—Ⅱ型CT机因电源空气开关故障引起扫描异常之两例分析

故障1、现象及排除 正常扫描途中,按下Start键后,无扫描,但Start灯可正常亮,待1～2秒后又返回Scan Set,此时错误提示:Servo alaum和TGP Fail,关机后重新启动故障不能解除。检查时使用手动曝光程序,发现100mA以下可通过,100mA以上不工作,错误提示     

GE 64排VCT机故障检修一则

故障现象 GE Lightspeed 64 VCT扫描仪在扫描时无异常现象,当CT机关机并切断电源重新启动时,系统不能正常开机.主要故障现象:(1)机架定位灯在显示面板上的指示灯不间断闪烁.(2)按定位灯键机架不旋转且定位灯不亮.     

GE Prospeed AI CT机故障分析与检修一则

故障现象 当按下扫描机架上的退床键时,床面不能后退,并且机架的显示板上的数字瞬时变为"----"四个短线标记,再按复位键后变为"0000",但进床、升床及降床工作均正常.     

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...     

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.