光纤理化传感检测装备和方法的研究

通过以光纤传感器为探头的光纤光度分析仪作为一种新型分析测试技术进行了研究，针对水样中的一些理化指标进行传感检测，实验证明，实用光纤传感检测适应现场检测的要求。     

基于光纤光栅的超声传感器实验研究

光纤光栅传感器具有许多独特优点,是近年来应用较多的一种传感器。主要研究了FBG光栅传感器对超声波的响应情况。结果表明,传感器输出信号强度与声功率表现了基本的线性性,提示可以利用光纤光栅检测超声,为体内超声场的无创测量提供了新的工具。     

光纤光栅超声传感器实验研究

光纤光栅传感器具有许多独特优点,是近年来应用较多的一种传感器。本实验主要研究了FBG光栅传感器对超声波的响应情况。结果表明传感器输出信号强度与声功率表现了基本的线性性,提示可以利用光纤光栅检测超声,为体内超声场的无创测量提供了新的工具。     

光纤传感技术在水质分析中的应用

光导纤维是一种特殊形式的光波传导介质，由光纤一端入射的光辐射基于光纤与包纤界面（玻璃）的全内反射作用而传至光纤另一端射出。无需任何中间级就能把待测的炎和光纤内导光联系起来。光的传播不受光纤弯曲的影响，可随光纤的弯曲进行传播，尤其在信息传递方面因其频率高、容量大、无电磁r扰等技术特点，以及尺寸小、运量轻、可弯曲、成本低、耐腐蚀等应用特点，在通信技术领域迅速得到了推广应用。在精密测试、检测领域中，光纤传感器技术也受到厂广泛的重视。但作为化学和生化分析、监测传感器，光纤的应用起步较晚。1976年V．Van和R…     

生物传感器与鼠疫耶尔森菌检测

生物传感器由于具有轻巧和灵敏度高的特点，可能会在微生物检测中发挥重要作用。尽管目前由于微生物检测的商品化传感器还十分稀少，但是一个值得探讨的发展方向。鼠疫作为一种典型的人兽共患病广泛分布在全世界，其病原鼠疫耶尔森菌的检测因此显得尤为重要。本综述了光纤传感器、不寻址电位传感器和平面波导传感器在鼠疫耶尔森菌检测中的应用，介绍了各传感器原理与特点，并对灵敏度和特异性进行了讨论。     

光纤倏逝波生物传感器在微生物检测中的应用

本文简单介绍了光纤倏逝波生物传感器的结构与原理,重点回顾了光纤倏逝波生物传感器在微生物检测中的应用情况,同时就其面临的一些问题和发展趋势进行了探讨。     

光纤生物传感器

光纤生物传感器是生物传感器的一个新的研究方向，在近十年中取得的研究进展令人瞩目，并已用于医学病原体、食物毒性、地下水污染、生化武器和环境样品等的快速检测，对其发展状况作详细报道。     

医用光纤温度传感器的研制

本文介绍了一种包层折射率温度敏感式光纤温度传感器,其数据采集、处理和结果显示均由单片机控制。该传感器具有较高的温度分辨率,△T≤±0.1℃而且还具有准确、快速、抗电磁干扰能力强和智能化等特点。     

光纤传感技术在生物医学中的应用

近几年来,光纤传感元件或传输元件已经成为光纤应用的一个新的有前途的领域。光纤传感器与其它各类传感器相比,不仅具有抗各种干扰和灵敏度高等优点,而且由于它细长柔软,具有几何多面(机动)性,为设计制造各种复杂的光学、光电仪器提供方便。光纤传感器可用于传感各种物理量,如声压、磁场、电源、温度、速度、位移等,经过研究试验,必将得到广泛的应用。由于人体的内脏和     

光纤传感检测空气及水中NH3／NH^＋4的研究

设计开发了一个光纤气敏传感检测系统，可用于大气及水质环境中ＮＨ３／ＮＨ＋４的检测。其探头结构采用溴白里酚蓝＋氯化铵内充液型，仅用一套系统（包括一套光路、电路系统）即可检测不同的分析参数。整个系统体积小，价格低廉，性能稳定，检测灵敏度达到甚至超过了采用复杂仪器结构的光纤传感器。系统对水中ＮＨ＋４的检测限为２μｍｏｌ／Ｌ，换算成ＮＨ３浓度，则检测限达ｎＭ级。     

光纤温度传感器在永磁共振磁体温控系统中的应用

光纤温度传感器因其在测量和传递信号部分没有电磁的参与,完全不受电磁的干扰。它的抗电磁干扰(EMI/RFI)特性使其具有传统温度传感器无法比拟的应用优势。光纤温度传感器测温是最新的温度测量技术,在强电磁环境下正在取代传统的电介质测温方式。在医疗、核电、工业测温领域有着广阔的发展前景。本文将此新型温度传感器应用于医用磁共振成像系统的永磁体温度控制,详细介绍其工作原理、系统实现并指出其应用优势。     

58例前部缺血性视神经病变的临床分析

目的：观察前部缺血性视神经病变的视野检查和眼底荧光血管造影等特征,探讨其对前部缺血性视神经病变的临床应用价值。方法：对58例（58眼）前部缺血性视神经病变的视野和眼底荧光血管造影的图像进行分析。结果：眼底表现以视盘苍白水肿为最常见。视野主要表现为与生理盲点相连的象限性、相对性或绝对性缺损,其中上方缺损9眼（占15.5%）,下方缺损21眼（占36.2%）。大部分36眼（62.1%）眼底荧光血管造影表现为早期视盘缺血区弱荧光,晚期荧光增强。结论：本组病例42只眼（占72.4%）仅依靠眼底荧光血管造影表现可以确定视盘缺血的部位,16只眼（占27.6%）视盘缺血部位的确定需要结合视野检查结果。因此,视野检查结合眼底荧光血管造影可提高前部缺血性视神经病变的诊断率。     

光纤传感检测水中氰化物的研制

目的 探讨光纤传感检测探头的原理，建立适应现场检测的方法。方法 水中CN^-与茚三酮反应生成红棕色产物，光纤探头插入水样中进行测定。结果 检测浓度范围为0.01-0.1mg/L，最低检出限0.01mg/L。结论 采用光纤传感测定水中氰化物，为野外和在线场检测提供一种新方法。     

Computer-assisted planimetry associated with Sturge-Weber syndrome

Photographs of the optic nerve head (optic disc) in the eye are used for the clinical assessment of the disease glaucoma. These images are usually subjectively assessed by a clinician. A case of Sturge-Weber Syndrome which includes glaucoma as a symptom, is presented here. Narrowing of the rim of the optic disc was measured using custom-made measurement software confirming glaucomatous progression. To maximize the information obtained from optic disc images, low cost software can assist with quantifying disc parameters aiding clinical interpretation.     

Differential diagnosis of the swollen optic disc

The differential diagnosis of a swollen optic disc is described, paying particular attention to the two areas of greatest difficulty: differentiation between a normal optic disc and early disc swelling; and differentiation between optic disc swelling and a simulating condition.     

Elevated serum anti-phosphatidylcholine IgG antibodies in patients with influenza vaccination-associated optic neuritis

Introduction

Because the optic nerve is mainly comprised from phospholipids such as phosphatidylcholine, the association between optic neuritis, anti-phospholipids antibodies and vaccination was examined.

Subjects

Two female pediatric patients suddenly presented bilateral optic neuritis after administration of trivalent inactivated influenza vaccine.

Methods

These two patients and another 11 patients with central nervous system demyelinating diseases were examined these anti-phospholipids antibodies. And immune histopathology was examined using serum derived from a patient with optic neuritis.

Results

High serum titer of anti-phosphatidylcholine antibody levels were detected during acute phase in patients with optic neuritis. The patient's serum IgG antibodies were found to have stained the capillary endotheliums in the preserved autopsied optic nerve. Patients with optic neuritis had significantly elevated serum levels of anti-phosphatidylcholine antibody in comparison to the other patients without optic neuritis.

Conclusion

Anti-phosphatidylcholine antibodies may be one of the causes of optic neuritis.     

视网膜眼底图像中视盘的检测方法

视盘的准确检测对视网膜眼底图像的其他特征,如血管和微动脉瘤的精确检测非常重要。本文提出一种结合视盘亮度和圆形度特征的视盘检测方法,先对眼底图像进行预处理,然后运用数学形态学运算去除血管的干扰,采用阈值分割提取出可能为视盘的区域,最后再根据视盘的面积和圆形度特征检测出真正的视盘区域。实验结果表明,本文算法具有较高的定位精度和较快的定位速度。     

Preoperative radiological evaluation and surgical strategy for the preservation of visual acuity in patients with skull base meningiomas--two case reports

Two women aged 48 and 73 years, respectively, presented with unilateral visual disturbance. On admission, magnetic resonance imaging (MRI) showed an extraaxial mass in the parasellar region. Contrast-enhanced fast imaging with steady-state acquisition (CE-FIESTA) showed that the optic nerves were compressed and encased by the tumors. At an early stage of surgery, we performed decompression of the optic nerves to avoid optic nerve injury. Both the patients were relieved of visual disturbances without any postoperative neurological deficit. In conclusion, CE-FIESTA is a useful diagnostic tool for preoperative evaluation of the optic nerves in patients with skull base meningiomas. Decompression of the optic nerves should be performed at an early stage of surgery in meningioma patients presenting with visual disturbance.     

Optic neuritis following Varicella zoster vaccination: Report of two cases

Two women presented at our clinic with vision blurring following Varicella zoster virus (VZV) vaccination, 3 weeks and 1 week ago. Ophthalmologic examination and magnetic resonance imaging revealed bilateral and unilateral optic neuritis, respectively. One patient had a history of optic neuritis in the fellow eye 33 years ago without recurrence since then. Both patients completely recovered after treatment with high dose intravenous methylprednisolone followed by a tapered dose of oral prednisolone. This is the first report of optic neuritis occurring in relation to VZV vaccination.     

Optic neuropathy induced by thinner sniffing

A case of optic neuropathy induced by thinner sniffing is reported. A 17-year-old girl, who had been sniffing a lacquer thinner for three months, suffered acute blindness followed by optic atrophy. Brain computed tomography revealed symmetrical low attenuation areas in the bilateral putamen. An analysis of the thinner by gas chromatography showed that its major components in a vaporized state were methyl alcohol and metyhl acetate. The optic neuropathy was induced by these solvents. In the diagnosis of the intoxication of mixed organic solvents, the measurement of each solvent in its vapor phase is considered to be quite important.