F78－ⅢA300mAX线机准直器的改进

Ｆ７８－ⅢＡ３００ｍＡＸ线机准直器的改进刘慧琴，韩丰谈在用Ｘ线机摄片时，有时忘了关闭准直器的模拟灯，时间一长，就会烧坏模拟灯或烧焦模拟灯插座。因此，有必要做一定时电路保护模拟灯。模拟灯的定时电路工作原理如下：由Ｘ线机准直器接线号Ｊｘ８４－１和Ｊｘ８４...     

工频程控X线机故障检修浅析

工频程控Ｘ线机 (微机控制Ｘ线机 ) ,是国内主要生产Ｘ线机厂家在 90年代中期开发研制的 (如北京万东医疗装备股份有限公司 ,上海医疗设备厂 )。本文以北京万东医疗装备股份有限公司生产的ＦＳＫ3 0 2 -1Ａ型 5 0 0ｍＡＸ线机为例。由于ＦＳＫ3 0 2 -1Ａ型Ｘ线机采用了微机控制技术 ,ｋＶｐ、ｍＡ(Ｘ线管灯丝加热采用占空比的方式控制逆变器逆变 )、Ｓｅｃ三参量控制精度和稳定性较普通工频Ｘ线机要高许多 ,故其故障率相对普通工频Ｘ线机而言要低很多 ,但故障判断与检修较难一些。下面就我们在安装调试 ,检修过程中所遇到的一些故障综合分析…     

西门子CF 800 mA X线机体层摄影使用体会

西门子ＣＦ８００ｍＡＸ线机体层摄影使用体会ＴｈｅＥｘｐｅｒｉｅｎｃｅｏｆＴｏｍｏｇｒａｐｈｙＵｓｉｎｇＳＩＥＭＥＮＳＣＦ８００ｍＡＸ－ｒａｙＭａｃｈｉｎｅ贾庆华郭瑞娟西安市第四人民医院７１０００４西门子ＣＦ８００ｍＡＸ线机是电子计算机化的先进Ｘ线机。...     

F78─Ⅱ300mAX光机遮线器照明电路改装

Ｆ７８─Ⅱ３００ｍＡＸ光机遮线器照明电路改装武警湖北省总队医院放射科娄平汉为了提高照片质量，使所照部位能够达到正确的诊断目的，国内外各生产Ｘ光机厂家，所产Ｘ线机大多配备了Ｘ线遮线器，既能对所照部位起到控制照射野的功能，又起到遮线作用。进口机器所配遮线...     

电视透视定位X线摄影在脊柱创伤检查中的应用

Ｘ线摄影是脊柱创伤检查中最常用的检查方法 ,为提高脊柱创伤Ｘ线检查的质量 ,我们采用在电视透视下定位进行Ｘ线摄影 ,取得较好的临床效果。1　材料和方法1 1　仪器与对象　设备为ＧＥＴＸ Ⅲ遥控Ｘ线机 ,其储片盒可储存 5 0张 2 5 .5ｃｍ× 30 .5ｃｍＸ线胶片。 1999年10月— 2 0 0 1年 9月对 113例脊柱创伤患者进行电视透视下定位Ｘ线摄影 ,其中颈椎 2 1例、胸椎 16例、胸腰段 2 8例、腰椎 4 0例、骶尾椎 8例。1 2　检查方法　患者仰卧或侧卧在Ｘ线机检查床上 ,摄影前首先对检查部位进行透视定位 ,然后选择摄影条件档 ,Ｘ线胶片可采用全…     

高压演示器的设计和应用

在Ｘ线机构造维修课教学中，有许多高压实验内容。实际教学中由于高压实验条件的限制，这些实验课仅列入实习大纲中而得不到落实。为了让学员能掌握有关高压实验方面的感性知识，我们利用废旧Ｘ线机器件自制了１台Ｘ线教学高压演示器。经７个期班教学实践，该演示器基本满足了专业课的高压实验演示需要。一、演示器的结构１．箱体：由４ｍｍ厚透明有机玻璃板制成（体积：７０ｃｍ×３０ｃｍ×７０ｃｍ）。２／３箱体内充装绝缘油。底部安放着３０ｍＡＸ线机使用的高压变压器和Ｘ线管灯丝变压器。上部设置一实验平台，实验平台上设有Ｘ线管固…     

计算机X线摄影在老年床旁胞部摄影中的应用

计算机Ｘ线摄影 (ＣｏｍｐｕｔｅｄＲａｄｉｏｇｒａｐｈｙ ,ＣＲ)技术的出现 ,提高了影像质量 ,特别是床旁胸部摄影的照片质量 ,对提高诊断水平起着重要作用。本文总结了我院应用ＣＲ系统对老年患者进行床旁胸部摄影的结果。1　材料与方法用ＦＣＲ系统对 5 46例次老年住院患者行床旁前后卧位胸部Ｘ线摄影。年龄 6 0～ 93岁 ,平均 79岁。Ｘ线机 :ＳＩＥＭＥＮＳｍｏｂｉｌｅｔｔｐｌｕｓ。影像处理系统 :富士计算机Ｘ线摄影 (ＦＣＲ) 90 0 0 ,ＤＰ -2 6 36 ,干式热敏打印机 ,富士ＤＩ -ＡＴ热敏胶片 ,富士标准型影像板 43ｃｍ× 35ｃｍ。照…     

医院放射科X线片的质量管理问题

我院是一家二级甲等医院。有大型Ｘ线机三台。其中西门子 80 0ｍＡＸ线机一台 ,北京产 30 0ｍＡＸ线机和 5 0 0ｍＡＸ线机各一台。保持长期稳定的Ｘ线片质量 ,涉及多方面的因素。本文就这方面的问题进行一些探讨。1　材料与方法本文材料取自 1998～ 2 0 0 0年 3年的Ｘ线片 ,采取随机抽样的方法 ,每年随机抽取 10 0份 ,参照卫生部的有关规定 ,按照Ｘ线片的五项评审标准评片 ;(1)位置正确 ;(2 )对比度清晰、良好 ;(3)无污染、划损 ;(4)铅字号码整齐、无错号 ;(5 )造影片对比剂充盈满意、显影清晰、充分显示解剖结构形态 ,提供满意的诊断依据。…     

影响婴幼儿X线摄影的因素及防范

婴幼儿心胸Ｘ线摄影是诊断胸部疾病的重要手段。本文对近 2年 15 5例婴幼儿胸部Ｘ线摄影进行分析 ,并探讨了影响婴幼儿Ｘ线摄影的因素及防范方法。1　临床资料1 1　本组 15 5例 ,其中男婴 85 ,女婴 70。年龄几小时～ 1 5岁 ,平均 8个月。用ＳＩＥＭＥＮＳＰＯＬＹＭＡＴ 5 0带自动摄影系统Ｘ线机、ＭＵ12 5ＭＭＯＢＵＥＸ -ＲＡＹＳＹＳＴＥＭ移动Ｘ线机 ;ＦＤＭ 42 0 0胶片自动冲洗机 ;胶片暗盒 2 0 5ｍｍ× 2 5 6ｍｍ(8ｉｎ× 10ｉｎ)。1 2　婴幼儿Ｘ线摄影的质量评定 ,依据照片质量评定标准并按影像的清晰程度和是否符合诊断要求分良好、…     

F_(99)-Ⅳ型500 mA X线机故障检修

Ｆ９９－Ⅳ型５００ｍＡＸ线机故障检修ＴｈｅＲｅｐａｉｒｏｆＢｒｅａｋｄｏｗｎｏｎＦ９９－Ⅳ５００ｍＡＸ－ｒａｙＭａｃｈｉｎｅ马树清河北省迁西县医院０６４３００１故障现象在投照腰椎正位时机器工作正常，在投照腰椎侧位时，摄影床面纵行（±６００ｍｍ）、横向...     

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.