小型中医经络检测仪的研制

在传统中医经络理论的基础上，结合先进的电子技术设备，设计了一种小型中医经络检测仪。此检测仪通过采集人体穴位经电流测试(给一定电流刺激)所反射出来的信息，经微控制器处理后，能够精确显示或打印出人体的健康状况。检测仪具有方便、快捷等优势，易推广普及。     

不同扫描参数对宽体探测器CT散射线的影响研究

目的 探讨宽体探测器CT在使用不同扫描模式、不同探测器宽度时在z轴方向上散射线的分布特点。方法 使用美国GE Revolution 16 cm宽体探测器CT,在机架扫描孔洞中心轴（z轴）上,以一定间隔布放热释光剂量计（TLD）,分别在逐层扫描模式下使用4、8、16 cm和螺旋扫描模式下4、8 cm探测器宽度,对CT标准剂量模体进行扫描,扫描条件：管电压为120 kV,有效管电流为200 mAs,扫描长度为16 cm,螺旋扫描时螺距分别为0.984∶1、0.516∶1。所有扫描重复4次,曝光后将所有TLD测量值除以4,并对数据进行统计学分析。结果 z轴方向上,人体头侧散射线剂量值均高于人体足侧（Z=-2.366、-2.197、-2.366、-2.371、-2.028、-2.236、-2.028,P<0.05）。逐层扫描时,不同探测器宽度的散射线分布差异有统计学意义（χ²=28.000,P<0.05）,均为探测器4 cm时最大,16 cm时最小,最大差值为67.5 μGy。螺旋扫描时,不同探测器宽度的散射线分布差异有统计学意义（Z=-3.233、-2.982,P<0.05）,均为探测器8 cm时最大,4 cm时最小,其中螺距0.516∶1时最大差值为97.67 μGy。螺旋扫描相同探测器宽度及有效管电流条件下,螺距为0.516∶1时高于螺距为0.984∶1的散射线,差异有统计学意义（Z=-3.296、-3.296,P<0.05）,其中探测器宽度为8 cm时最大差值为49.95 μGy。结论 宽体探测器CT不同探测器宽度的选择,可显著影响辐射场的分布和辐射值,应根据具体的临床需求选择合理的探测器宽度和相关参数,从而降低受检者、近台操作医务人员以及陪护人员的辐射剂量。     

百花定喘丸中非法掺入西药成分的鉴别与含量测定

目的:检查中成药百花定喘丸中非法掺入的西药成分醋酸泼尼松及地西泮。方法:采用高效液相色谱-二极管阵列检测(HPLC-DAD)分析技术,分离和测定百花定喘丸的甲醇提取液。结果:检查3批样品均含有醋酸泼尼松和地西泮并测定其含量。结论:本法操作简便,结果准确,专属性强,适用于检测百花定喘丸中添加的醋酸泼尼松及地西泮。     

西门子多角度双探头SPECT工作原理及探头维修一例

SPECT是进行骨癌转移检查的重要设备,主要介绍西门子公司的Signature系列varible angle双探头SPECT的简单工作原理和探头检修。     

Method for mapping cardiac arrhythmia in real time using microprocessor-based systems

The paper deseribes a method for mapping cardiac arrhythmias in real time using an 8 bit microprocessor system, the aim being to produce a monitor display that is ergonomically an improvement on the raw ECG signal in that its interpretation by medical staff is less onerous. Two characteristics are extracted from each QRS complex, one representing rhythm and the other the morphology of the complex. Both are easily implemented on microprocessor-based systems and together they define a twodimensional display divided into four primary diagnostic regions. The performance of the proposed system has been compared with that of another two-dimensional algorithm commonly used in this field, the cross-correlation scatter diagram, by applying both to the same sample of complexes. The method proposed in the paper was found to be both faster and more discriminating.     

神经阈值探测仪

叙述了一种神经阈值控测仪的设计、组成和临床应用方法，它的应用为脑瘫病人的外科诊治提供了一条新方法。     

自适应滤波器在微弱激光不稳定度测试中的应用

本文介绍通过自适应滤波器将微弱激光的有用信号从噪声中提取。     

Sensitivity of LR115 detector in diffusion chamber to Rn in the presence of Rn

Determination has been made of the sensitivity of LR115 type 2-track detectors (in units of m) to ²²²Rn, measured in the presence of ²²⁰Rn. Measurements have been made by means of a widely used diffusion chamber while Monte Carlo simulations have also been conducted. The experimentally derived sensitivities for ²²²Rn and ²²⁰Rn were found to be 0.470±0.022 and 0.486±0.042 m, respectively. For Monte Carlo simulations, the sensitivities to ²²²Rn gas were found to range from 0.618×10^–2 m (assuming that all ²¹⁸Po progeny decay before deposition onto the internal walls of the diffusion chamber) to 0.405×10^–2 m (assuming that all ²¹⁸Po progeny are deposited on the internal walls of the same containment vessel before decaying). The sensitivity to ²²⁰Rn gas of 0.465×10^–2 m found from Monte Carlo simulations agrees to within uncertainty with experimental findings. The experimentally derived sensitivity value for ²²²Rn indicates that 30% of the ²¹⁸Po progeny decay before deposition onto the internal walls of the diffusion chamber.