肝肿瘤诊断中DSA灌注成像的应用研究

目的研究数字减影血管造影（DSA）技术在肝癌诊断治疗中的应用价值。方法分析36例DSA影像资料数据．使用BP神经网络建立计算机智能诊断模型。结果把100个随机抽样测试样本（非病灶样本和病灶样本）输入模型验证,真阳性率为92％。结论DSA灌注成像对肝癌的诊断有重要价值,并对继续治疗方案的选择与制定有一定的临床意义。     

三维数字减影脑血管成像临床应用

三维数字减影血管造影(three dimensional digital subtraction angiography,3DDSA)是近年来DSA技术的新发展,是二维数字减影血管造影技术、球管旋转技术及三维重建技术三者相结合的产物。3DDSA作用原理是通过2次旋转化DSA采集图像,传至工作站进行三维重建;后处理方法主要是针对要显示的部位对病变进行任意角度观察;特点是能较常规DSA     

数字减影血管造影选择性血管栓塞治疗肝癌的护理

目的：探讨数字减影血管造影（DSA）选择性血管栓塞治疗肝癌的护理措施，早期发现并处理并发症。方法：总结：113例肝癌患者行DSA术前的准备及术中、术后的护理。结果：本组经行DSA栓塞治疗均一次成功。结论：DSA栓塞治疗肝癌效果良好，要求护理人员具有高度的责任心和精湛的业务技术，这对于治疗成功率具有重要的作用。     

CT减影技术诊断脑动静脉畸形的临床应用

目的 评价64排螺旋CT减影CT血管造影技术诊断脑动静脉畸形(AVM)的临床价值.方法 17例脑AVM患者行64排螺旋CT减影CT血管造影检查,对畸形血管团的数目、位置、范围、供血动脉的分布及引流静脉的方向等进行统计分析.结果 本组病例中减影CTA共发现17个病灶,与DSA和手术所见比较,1个直径1.2 cm的病灶被漏诊.减影CTA诊断脑AVM的敏感度、特异度及准确度分别为94.4%、100%、94.4%.减影CTA在显示细小供血动脉的清晰程度低于DSA,其判断脑AVM供血动脉的敏感度为83.0%.减影CTA对引流静脉的显示与DSA影像和手术所见一致. 结论 64排螺旋CT减影CTA可作为评价脑AVM的检查方法.     

照相减影技术在普通脑血管造影中的应用

减影技术早在1934年即有人提出，1962年才在美英文献中有报告。七十年代初，数字减影血管造影（DSA）即在工业发达的资本主义国家迅速发展。其优点是消除重叠在血管上之骨影及其它阴影，而血管影不变，从而提高对血管造影的分辨能力，达到提高诊断水平之目的。减影技术尚可改善因血管造影技术不良致使对比度不佳之照片质量。目前应用的减影技术主要有以下几种：一、照相减影技术：为本文重点介绍。二、电视消减技术：采用两个电视摄影机，一个发生正相，一个发生负相，将两个电视摄影机发出的影象重叠到电视屏上，形成减影图像。三、加色…     

旋转DSA技术及COMPAS功能在血管造影中的应用

目的探讨旋转DSA及COMPAS技术在血管造影中的应用。方法使用GE数字减影机对疑有血管病变的30例进行常规正侧位检查,而后选择合适的技术参数,对18例进行旋转DSA检查。结果18例患者病变血管位置清晰可见。12例脑血管造影中,11例避开了对比剂血管影的重叠,1例显示不佳;6例肝、肾动脉造影均清晰显示狭窄位置。结论旋转DSA技术及COMPAS功能能显示大多数特殊复杂病变血管并能辅助定位,是常规DSA的重要补充,对病变的诊断及治疗有很大价值。     

旋转DSA技术在腹部介入中的应用

目的：探讨旋转DSA技术在腹部介入中的应用(主要为肝癌患者的造影与治疗)。方法：应用Toshiba-2000数字减影血管造影系统对疑有血管纡曲病变的55例腹部介入患者先进行常规正位血管造影，然后选择合适的技术参数进行旋转DSA检查。结果：旋转DSA检查中50例(91％)造影图像均避开了多支血管相互的重叠，清晰地显示相关血管的来源和走向。5例快速旋转DSA检查多角度图像虽清晰显示出供血动脉，但因其局部血管过度纡曲上下重叠，局部血管走向显示欠佳。结论：旋转DSA技术能够更好地显示腹部病变的供血动脉和分支结构，多方位、清晰地显示纡曲动脉分支的走行、正常解剖和异常改变，是对常规血管造影的重要补充，为肝癌患者的诊断与介入治疗提供可靠依据。     

旋转DSA技术在肺栓塞诊疗中应用的研究

目的研究旋转DSA技术在肺栓塞(pulmonary embolism，PE)诊疗中的应用。方法建立小型猪肺栓塞模型13头，进行常规肺动脉造影并应用旋转DSA技术，对造影结果进行分析、评价和研究。结果将每头猪的肺分为相应的15条血管，共有195条血管。以病理阳性结果为标准，评价肺动脉造影及旋转。DSA技术诊断PE的价值。肺动脉造影及旋转。DSA共有47个血管阳性(24．1％)，敏感性为98％，特异性为99％，诊断准确性98％；有2个血管数字减影肺动脉造影阳性，病理阴性，假阳性率为1％；有1个血管数字减影肺动脉造影阴性，病理阳性，假阴性率为2％。结论旋转DSA技术有助于肺栓塞诊断，尤其对疑似病变有一定临床意义。     

数字减影脑血管造影的临床应用初步分析

数字减影血管造影(DSA)是一种新的医学影象诊断技术。这种将常规的血管造影与电子计算机结合起来的新方法已被广泛应用于临床,具有重要的诊断价值。关于数字减影脑血管造影。国外论述较多(1-6)。但国内尚未见报道,本文报告62例数字减影脑血管造影的临床应用经验,     

双能量成像在双源CT中的原理及初步应用中的新进展

双能量成像,顾名思义即是在2种不同的能量下成像.其前身是双能量减影,双能量成像是在其基础上延伸和发展出来的.双能量减影的概念早在1925年即被提出, 70年代才开始真正在临床上被研究和应用[1].双能量减影最初只应用于普放领域,但随着数字减影血管造影(DSA)技术的出现双能量减影又表现出了其独特的优势.     

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.