频域光学相干断层扫描检测青光眼黄斑区节细胞复合体厚度的临床研究

目的:探讨黄斑区神经节细胞复合体(GCC)厚度在正常眼压性青光眼(NTG)与原发性开角型青光眼(POAG)人群中的分布特征。方法:采用频域光学相干断层扫描(SD-OCT)对NTG患者81例81眼、POAG患者125例125眼及年龄、性别、屈光度相匹配的正常对照者56例56眼黄斑区视网膜、视盘进行扫描,分析计算出黄斑区整体上方GCC厚度(GCC-Sup)、下方GCC厚度(GCC-Inf)、平均GCC厚度(GCC-Avg)、视盘旁上方视网膜神经纤维层厚度(RNFL-Sup)、下方RNFL厚度(RNFL-Inf)及平均RNFL厚度(RNFL-Avg),Zeiss Humphrey 750型视野计检测各组中心30°视野平均缺损(MD)值,比较3组患者GCC、RNFL及MD参数的差异,并分析GCC厚度值、RNFL厚度值与MD值的相关性。结果:POAG组及NTG组的GCC-Avg、GCC-Sup、GCC-Inf、RNFL-Avg、RNFL-Sup、RNFL-Inf值及视野MD值均低于正常对照组,差异有统计学意义(P<0.05)。所有研究对象GCC-Sup、GCC-Inf、GCC-Avg值与对应区域RNFL厚度值均呈显著正相关(r=0.675、0.669、0.698,P<0.01)。RNFL-Avg值与视野MD值呈显著正相关(r=0.741,P<0.01),GCC-Avg与视野MD值亦呈显著正相关(r=0.613,P<0.01)。结论:频域OCT能定量检测黄斑区GCC厚度,并与RNFL和视野损害有较好的相关性,可为青光眼的诊治提供重要依据。     

光学相干断层扫描仪对原发性开角型青光眼患者早期诊断价值

目的探讨光学相干断层扫描仪(OCT)在原发性开角型青光眼(POAG)患者早期诊断中的价值。方法选取2015年4月至2016年4月于张家口市第四医院就诊的50例(50眼)POAG患者为研究对象,分为早期POAG组26例和中晚期POAG组24例,另同期选取30例健康无眼疾体检者为对照组,采用OCT检测3组对象视网膜神经纤维层(RNFL)厚度、视野缺损,测定视盘面积、视杯面积、盘沿面积、视杯容积、盘沿容积等视盘参数,并对3组检测数据进行比较。结果早期POAG组和中晚期POAG组患者上方、下方、鼻侧、颞侧4个视野RNFL厚度均显著低于对照组(P<0.05),中晚期POAG组患者上方、下方、鼻侧、颞侧4个视野RNFL厚度均显著低于早期POAG组(P<0.05);早期POAG组和中晚期POAG组患者上方、下方、鼻侧、颞侧4个视野缺损值均显著高于对照组(P<0.05),中晚期POAG组患者上方、下方、鼻侧、颞侧4个视野缺损值均显著高于早期POAG组(P<0.05);POAG患者视盘面积与对照组比较差异无统计学意义(P>0.05),早期POAG组和中晚期POAG组患者盘沿面积、盘沿容积低于对照组(P<0.05),视杯面积、视杯容积高于对照组(P<0.05),中晚期POAG组患者盘沿面积、盘沿容积显著低于早期POAG组(P<0.05),视杯面积、视杯容积显著高于POAG组(P<0.05)。结论 OCT可真实反映POAG患者RNFL厚度及视盘参数的改变,具有较高的敏感性和特异性,认为RNFL厚度及视盘参数可作为早期POAG诊断的敏感指标。     

原发性开角型青光眼患者光学相干断层扫描血管成像的临床特征

目的观察原发性开角型青光眼患者光学相干断层扫描血管成像的临床特征。方法采用横断面研究设计,对佛山市第二人民医院眼科中心中诊断为原发性开角型青光眼患者进行光学相干断层扫描血管成像检查,获取视神经纤维层厚度及视盘周围血管密度等参数,正常对照组进行相同检查;采用Stata 12.0统计学软件进行数据整理和分析。结果共有44例纳入本次研究,其中病例组23例,对照组21例。两组患者在性别,年龄,人工晶体眼,糖尿病,高血压等对比均无差异。对照组平均视神经纤维厚度为(114.7±10.5)μm,病例组为(63.8±12.4)μm,差异有统计学意义;对照组视盘平均血管密度(48.3±2.6),而病例组视盘平均血管密度为(34.9±6.4),差异有统计学意义。统计分析对照组与病例组在各个区域视神经纤维层厚度与血管密度比较差异有统计学意义。上方及下方神经纤维层厚度及血管密度变化最大,其次为鼻侧,颞侧变化最小。结论原发性开角型青光眼患者视神经纤维层厚度及视盘周围血管密度明显下降,其中上方及下方血管密度下降最大,其次为鼻侧,颞侧变化最小。     

原发性开角型青光眼视盘参数OCT测量的可重复性

目的评价光学相干断层扫描(OCT)在原发性开角型青光眼病人视盘各项参数检测中的可重复性。方法由同一名操作者对原发性开角型青光眼病人28例(48眼)进行OCT检查,每眼连续扫描3次,获得视盘面积(DA)、视杯面积(CA)、盘沿面积(RA)、视杯容积(CV)、盘沿容积(RV)、杯盘面积比(CDAR)、线性杯盘比(LCDR)、视盘竖径(DV)、视盘横径(DH)9个视盘参数,通过类内相关系数(ICC)评价各视盘参数测量的可重复性。结果 9个视盘参数的ICC值均较高,为0.775~0.948。结论 OCT测量视盘参数具有较好的可重复性,在原发性开角型青光眼的早期诊断和随访观察中具有重要价值。     

傅立叶OCT在早期原发性开角型青光眼中的诊断能力

目的：评价傅立叶域相干光断层成像术[Fourier-Domain Optical Coherence Tomography,FD-OCT, using the RTVue -100 (Optovue Inc, Fremont, California,USA）]在鉴别正常眼及早期原发性开角型青光眼（POAG）中的能力。 方法：横断面研究。对符合入选标准的早期原发性开角型青光眼组及正常组的所有受试者行FD-OCT及Humphrey视野（Humphrey Field Analyzer model 740, Carl Zeiss Meditec, Dublin, CA, USA）检查。比较早期POAG患者及正常人各视盘测量参数、神经纤维层厚度及后极部神经节细胞复合体(GCC)厚度;对早期POAG患者及正常人各测量参数绘制受试者操作特征曲线（ROC）,计算ROC曲线下面积（AROC）,敏感性、特异性及阳性和阴性似然比评估各参数的诊断性能。 结果：分析34例早期POAG患者及42例正常人结果。在特定特异度（95% and 85%）下垂直杯盘比（C/D vertical ratio）的灵敏度和阳性似然比最高,分别为79.4%和88.2%,33.4和7.4。在所有单一参数中,垂直杯盘比的AROC最大,为0.930。使用logistical诊断模型联合垂直杯盘比、RNFL AT on 3.45mm和盘沿面积,AROC为0.949。 结论：FD-OCT所测得的视盘、神经纤维层厚度及GCC厚度改变在早期POAG患者及正常人差异有显著性。以AROC、敏感性、特异性及阳性和阴性似然比为评价指标,位居前三位的指标为：垂直杯盘比、RNFL AT on 3.45mm和盘沿面积。     

光学相干断层扫描仪测量原发性开角型青光眼视网膜神经纤维层厚度的分析

目的：运用光学相干断层扫描仪（opticai coherence tomography，OCT）检测正常人与原发性开角型青光眼（primary openangle glaucoma，POAG）患者的视盘周围视网膜神经纤维层（retinal nerve fiber layer，RNFL）厚度并分析。方法：研究对象分二组：正常组和POAG组，均接受常规眼科检查，视野检查及OCT检测RNFL厚度，并进行统计学分析。结果：入选的研究对象正常组148例（294眼），POAG组48例（89眼）。经统计学分析正常组与POAG组早期、进展期、晚期的颞侧、上方、鼻侧、下方及平均RNFL厚度差异均有统计学意义（P=0．000）。分析POAG组，以年龄（X1）、眼压（X2）、平均视野（X3）、病程（X4）作为自变量，以平均RNFL厚度（Y）作为因变量，建立多元线性回归方程。结论：通过OCT对RNFL厚度的检测，有助于了解和监测POAG对RFNL的损伤，是一种很有价值和潜力的青先眼客观辅助诊断方法。     

OCT比较高眼压和原发性开角型青光眼的视网膜神经纤维层厚度

目的采用光学相干断层扫描技术（OCT）测得正常人、高眼压者和原发性开角型青光眼患者的视网膜神经纤维层（RNFL）的厚度并进行比较。方法选取门诊就诊的患者和正常志愿者,根据眼压、视野和视乳头形态分为正常组76名（152眼）,高眼压组70例（109眼）,原发性开角型青光眼组67例（112眼）,采用OCTCIRRUSZeiss分别测得3组的平均RNFL和4个象限的RNFL。结果正常组平均RNFL为（107．61±8．03）μm,高眼压组平均RNFL为（105．26±9．22）μm,原发性开角型青光眼组平均RFNL为（91．00±10．55）μm。正常人平均、上方和下方RNFL与原发性开角型青光眼患者比较差异有统计学意义（P〈0．01）;高眼压组与原发性开角型青光眼组之间平均RNFL比较差异有统计学意义（P〈0．01）;正常组和高眼压组之间平均RNFL比较差异无统计学意义（P〉0．05）。结论通过对RNFL厚度的分析,为高眼压和原发性开角型青光眼的鉴别诊断提供帮助。     

光学相干断层扫描仪测量视网膜视盘周边区神经纤维层与黄斑厚度对青光眼的诊断价值

目的 比较视盘周边区神经纤维层(RNFL)厚度与黄斑区视网膜厚度(MRT)的光学相干断层扫描仪(OCT)不同测量部位对青光眼的诊断价值.方法 48例(71眼)青光眼患者纳入该研究,并取40例(63眼)健康体检者为正常对照组,均行OCT检查.采用ROC曲线和曲线下面积(AUC)比较RNFL厚度与黄斑厚度对青光眼的诊断价值.结果 青光眼患者视盘周边区平均RNFL(t=12.950,P=0.000)与黄斑(t=8.917,P＝0.000)的厚度均比正常人减少;并且RNFL与黄斑的厚度与青光眼的严重程度呈负相关,rs为0.361(t=4.516,P=0.024).AUC比较显示RNFL周边厚度的诊断价值均要高于黄斑厚度;在RNFL周边厚度中,又以RNFL周边6点钟的厚度指标AUC最大(95%CI 0.664～-0.865).相应诊断界值下,RNFL周边6点钟和黄斑厚度的诊断特异度、灵敏度和诊断符合率分别为85.6%、91.2%、87.1%和80.2%、88.4%、84.6%.结论 视盘周边区RNFL厚度与黄斑厚度对青光眼均有较好的早期诊断价值,而又以视盘周边区下部RNFL厚度的诊断效果为最佳.     

视盘分级法评估原发性慢性闭角型青光眼视神经损害与OCT视神经纤维检查的相关性

目的用视盘损害分级(disc damage likelihood scale,DDLS)方法评估原发性慢性闭角型青光眼(primarychronic angle-closure glaucoma,PCACG)视神经损害,探讨其与光学断层相干扫描仪(optical coherence tomography,OCT)检测视神经纤维厚度参数的相关性。方法收集2009年10月至2010年8月我院眼科PCACG患者共38例(73眼),通过双面Volk 90D前置镜在裂隙灯下对视盘直径及其盘沿最窄处宽度测量,按DDLS分级标准进行分级;Stratus OCT 3000成像仪、RNFL3.4程序获取象限位、钟点位及自选参数的视网膜神经纤维(retina nerve fiber layer,RNFL)厚度。运用SPSS15.0统计软件分析DDLS分级与OCT视盘周围3.4 mm处RNFL检测参数的相关性。结果共38例(73眼)中大直径视盘17眼(占23.3%),中等直径视盘41眼(占56.2%),小直径视盘15眼(占20.6%);上方、下方、颞侧象限RNFL厚度均值与DDLS分级评分相关(r=-0.673,P=0.0001;r=-0.605,P=0.0001,r=-0.499,P=0.0014),鼻侧方象限RNFL厚度均值与DDLS分级评分不相关(r=-0.352,P=0.0602);11、7、6、10、12钟点位RNFL厚度与DDLS分级评分具有相关性(r=-0.673,P=0.0001;r=-0.605,P=0.0001;r=-0.531,P=0.0006;r=-0.525,P=0.0007;r=-0.520,P=0.0008),而3、2、8点位无统计学意义(r=-0.320,P=0.0501;r=-0.320,P=0.0510;r=-0.297,P=0.0702);DDLS分级评分与OCT检查自选参数Avg、Smax、Imax的RNFL厚度也呈中度相关(r=-0.582,P=0.0001;r=-0.504,P=0.0012;r=-0.478,P=0.0024)。结论 DDLS分级方法对PCACG视神经损害的评估与OCT视网膜神经纤维厚度主要检查参数检查具有相关性,DDLS分级方法适用于PCACG视神经损害的评估。     

OCT在原发性急性闭角型青光眼中的应用

目的应用光学相干断层扫描仪（OCT）测量原发性急性闭角型青光眼（APACG）视网膜神经纤维层（RNFL）厚度,观察其变化规律。方法应用OCT测量首次急性发作（〈6 h）的APACG患者（26例）RNFL厚度的改变,测量时间为入院经治疗角膜透明后当天和经治疗眼压下降至正常范围后1周、1个月、3个月、6个月（共5次）。同时测量正常成人（年龄匹配,30例）的RNFL厚度作为对比。结果入院经治疗角膜透明当天和眼压正常后1周平均RN-FL厚度分别为（122.14±21.37）（、110.25±17.43）μm,较正常对照组增厚（P〈0.01,P〈0.05）;眼压正常后1个月平均RNFL厚度为（103.34±15.19）μm,较正常稍增厚（P〉0.05）;眼压正常后3个月和正常后6个月平均RNFL厚度分别为（102.56±14.11）（、101.22±15.54）μm,较正常对照组稍下降（P〉0.05）。结论眼压急性升高在早期造成RNFL水肿,RNFL厚度增厚,经过治疗眼压降至正常范围后,RNFL厚度逐渐下降。眼压正常后3个月和6个月RNFL厚度趋于稳定。     

傅立叶光学相干断层扫描测量黄斑区节细胞复合体和视网膜神经纤维层的可重复性研究

目的 采用傅立叶光学相干断层扫描（OCT）对正常眼压性青光眼（NTG）与原发性开角型青光眼（POAG）患者的黄斑区节细胞复合体（mGCC）和视网膜神经纤维层（RNFL）进行测量,评估其可重复性和诊断能力。方法 以NTG患者（NTG组,n=15）、POAG患者 (POAG组,n=15)和正常人（正常对照组,n=15）作为研究对象,采用傅立叶OCT测量各组RNFL厚度以及mGCC厚度及其整体丢失体积(GLV)和局部丢失体积(FLV),首先由检查者A测量,重复5次,间隔时间为4 h,检查者B于次日行相同检查。以检查者内和检查者间的类内相关系数（ICC）评估可重复性,受试者工作特征曲线下面积(AROC)分析诊断能力。结果 三组mGCC和RNFL测量的ICC均>0.75。NTG组和POAG组的各项测量参数与正常对照组比较差异均有统计学意义（P<0.05）;NTG组与POAG组RNFL厚度和FLV%比较差异无统计学意义（P>0.05）,而mGCC厚度和GLV%比较差异有统计学意义（P<0.01,P<0.001）;RNFL与mGCC参数间的AROC比较差异无统计学意义（P>0.05）。结论 对于NTG和POAG患者,傅立叶OCT测量mGCC和RNFL的可重复性好,RNFL具有良好的诊断能力,mGCC可作为良好的补充诊断依据。     

应用光学相干断层成像术检测开角型青光眼视网膜神经纤维层厚度

目的:探讨光学相干断层成像术(OCT)检测开角型青光眼视网膜神经纤维层(RNFL)厚度与视野损害的关系,评价OCT在早期诊断青光眼中的意义。方法:正常人30例(52眼),高眼压9例(14眼)以及分成早期、进展期、晚期的原发性开角型青光眼48例(74眼)。采用Humphrey全自动视野计、Zeiss鄄HumphreyOCT分别进行视野以及视盘周围RNFL厚度检测。比较正常组、高眼压组以及青光眼组的RNFL厚度,分析青光眼组视野检测的平均缺损(MD)与RNFL厚度的关系。结果:正常组与高眼压组RNFL厚度差异无显著性(P>0.05);青光眼组较正常组、高眼压组RNFL厚度明显变薄,晚期青光眼表现为弥漫性RNFL缺损。视野检测的平均缺损与RNFL厚度呈负相关(P<0.05)。结论:OCT能够反映青光眼RNFL厚度的改变,为临床早期诊断青光眼提供更多的信息。     

Diagnostic capability of Fourier-Domain optical coherence tomography in early primary open angle glaucoma

Background Optical coherence tomography （OCT） is a high resolution noncontact imaging modality which can quantitatively detect the optic disc and retinal structure.This study was designed to evaluate the diagnostic capability of parameters of the optic disc, retinal nerve fiber layer thickness, and ganglion cell complex （GCC） using a new technology called Fourier-domain OCT （FD-OCT） for early primary open angle glaucoma （POAG） patients.Methods Two groups of patients, early perimetric damage POAG and normal subjects were included in this observational cross-sectional study.All patients underwent FD-OCT and visual field examination in addition to full ophthalmic examinations.Receiver operating characteristic curves （ROC） were studied for all parameters.The sensitivity and specificity for distinguishing between normal and early glaucomatous eyes, the areas under the receiver operating characteristic curves （AROC） and positive, negative likelihood ratios were evaluated for all the single parameters and selected combined parameters using arbitrary cutoffs.Results Thirty-four eyes of 34 early POAG patients and 42 eyes of 42 normal subjects were analyzed.Cup/disc （C/D）vertical ratio presented the best sensitivity and positive likelihood ratio for selected specificities （95% and 85%） which were 79.4% and 88.2%, 33.4 and 7.4, respectively.Among all single parameters, the C/D vertical ratio demonstrated the highest AROC which was at 0.930.The average thickness of circumpapillary RNFL on 3.45 mm showed the highest AROC among all of the peripapillary RNFL parameters.The sensitivity at selected specificity and AROC of GCC were not as high as C/D vertical ratio and RNFL AT on 3.45 mm.When the C/D vertical ratio, RNFL AT on 3.45 mm, and rim area were combined using a logistical diagnostic model, the AROC was raised to 0.949 but not significantly different from the top single parameter, C/D vertical ratio.Conclusions The key parameters obtained by FD-OCT were able to show the significant differences of optic discs,thickness of RNFL and GCC between POAG patients and normal subjects.According to sensitivity, specificity, likelihood ratio and AROC, the top three parameters from FD-OCT for early diagnosis of POAG were C/D vertical ratio, RNFL AT on 3.45 mm, and the rim area.     

FD-OCT测量视盘周围视网膜神经纤维层和视神经乳头参数在青光眼早期诊断中的意义

目的:探讨RTVue傅里叶域光学相干断层扫描成像仪(fourier-domain optical coherence tomography, FD-OCT)测量视盘周围视网膜神经纤维层(retinal nerve fiber layer, RNFL)及视神经乳头(optic nerve head,ONH)各项参数在青光眼早期诊断中的作用?方法:应用RTVue FD-OCT测量青光眼患者50例76只眼及正常人45例80只眼的视盘周围RNFL厚度及ONH各项参数,比较正常眼与各期青光眼的差异,用受试者工作特征曲线下面积(area under the receive operating characteristic curve, AUROC)评价其在青光眼早期诊断中的作用?结果:不同阶段青光眼患者各象限及平均RNFL厚度均比正常人减少,差异有统计学意义(P < 0.001)?除视盘面积,其余ONH参数(视杯面积?盘沿面积?盘沿容积?视神经容积?视杯容积?杯盘比?水平杯盘比?垂直杯盘比)在正常组与青光眼组之间差异均有统计学意义(P < 0.001)?正常组与青光眼组之间平均RNFL?垂直杯盘比?杯盘比和视杯面积的AUROC最大?正常组与早期组之间平均RNFL?杯盘比?视杯面积AUROC最大?结论: RTVue FD-OCT测量视盘周围RNFL厚度及ONH参数有助于青光眼早期诊断?     

Optical coherence tomography in measuring retinal nerve fiber layer thickness in normal subjects and patients with open-angle glaucoma

Objectives To investigate image characteristics and thickness of the retinal nerve fiber la yer (RNFL) in normal and glaucomatous eyes using optical coherence tomography ( OCT), and analyze the relationship between RNFL thickness and visual field index. Methods Eighty-three normal persons (150 eyes) and 83 patients with primary open angle glaucoma (POAG, 149 eyes) underwent OCT examinations with 3.4 mm diameter circ le scan to calculate the RNFL thickness. Statistical analysis was used to compa re differences in RNFL thickness in quadrants and means between the normal and g laucomatous groups and the different stages of POAG. Linear correlation and reg ression analysis were used to show the correlation between RNFL thickness and vi sual field index of 115 eyes in glaucomatous patients. Reproducibility, sensiti vity and specificity of RNFL measurements using OCT were evaluated.Results RNFL thickness measured by OCT in normal subjects was thicker in superior and in ferior, less in temporal, and thinnest in nasal quadrants. The curve showed dou ble peaks. RNFL of glaucomatous patients showed local thinning or defect, diffu se thinning, or both. The mean RNFL thicknesses of the normal group in the temp oral, superior, nasal and infeior quadrants were 90.1±10.8 μm, 140.4±10. 5 μm, 85.2±14.0 μm, and 140.4±9.7 μm, respectively with a mean of 1 14.2±6.0 μm.The numbers for the glaucomatous group were respectively 56.0 ±31.0 μm, 81.0±36.3 μm, 47.1±27.5 μm, and 73.4±38.4 μm for th e four quadrants, with a mean of 64.6±28.8 μm. There was a significant dif ference in RNFL thickness between the normal and glaucomatous groups (P&lt;0. 000), and the three stages (early, developing and late) of glaucomatous groups ( P&lt;0.000). There was a close negative relationship between RNFL thickness a nd visual field index (r=-0.796, P&lt;0.0001). The sensitivity and speci ficity of RNFL thickness in POAG measured using OCT were 93.3% and 92.0%, res pectively.Conclusions OCT can quantitatively measure RNFL thickness differences between normal persons and glaucomatous patients. RNFL thickness gradually decreases while visual fie ld defect increases with the development of POAG.     

频谱光学相关断层扫描观察眼内硅油取出术前后黄斑区形态的变化

目的 利用频谱光学相关断层扫描(SOCT)观察患者硅油眼行取油手术前后黄斑区形态的变化,探讨患眼的最佳矫正视力(BCVA)与黄斑区厚度及黄斑裂孔底径的相关性.方法 收集20例(20眼)视网膜脱离复位术后的硅油填充眼,其中黄斑裂孔性视网膜脱离组9例(A组),非黄斑裂孔性视网膜脱离组11例(B组).在行硅油取出术前后进行眼科临床检查,包括BCVA、眼底照相及SOCT等.结果 A组取油前后BCVA变化与黄斑裂孔底径的变化无相关性(r=-1.02,P=0.394);B组取油前的BCVA与黄斑中心凹厚度呈显著负相关(r=-0.75,P=0.008),而取油前后BCVA变化与黄斑中心凹厚度的变化无相关性(r=-2.66,P=0.059).结论 SOCT作为无创观察黄斑区形态的辅助检查具有重要价值.非黄斑裂孔性视网膜脱离在硅油填充时期BCVA与黄斑中心凹厚度呈负相关.     

Comparative study of optic disc measurement by Copernicus optical coherence tomography and Heidelberg retinal tomography

Background  Copernicus optical coherence tomography (SOCT) is a new, ultra high-speed and high-resolution instrument available for clinical evaluation of optic nerve. The purpose of the study was to compare the agreements between SOCT and Heidelberg retinal tomography (HRT).

Methods  A total of 44 healthy normal volunteers were recruited in this study. One eye in each subject was selected randomly. Agreement between SOCT and HRT-3 in measuring optic disc area was assessed using Bland-Altman plots. Relationships between measurements of optic nerve head parameter obtained by SOCT and HRT-3 were assessed by Pearson correlation.

Results  There was no significant difference in the average cup area (0.306 vs. 0.355 mm, P=0.766), cup volume (0.158  vs. 0.130 mm, P=0.106) and cup/disc ration (0.394 vs. 0.349 mm, P=0.576) measured by the two instruments. However, other optic disc parameters from SOCT were significantly lower compared with HRT-3. The Bland-Altman plot revealed good agreement of cup area and cup volume measured by SOCT and HRT-3. Bad agreement of disc area, rim area, rim volume and cup/disc ratio were found between SOCT and HRT-3. The highest correlations between the two instruments were observed for cup area (r²=0.783, P=0.000) and cup/disc ratio (r²=0.669, P=0.000), whereas the lowest correlation was observed for disc area (r²=0.100, P=0.037), rim area (r²=0.275, P=0.000), cup volume (r²=0.005, P=0.391) and rim volume (r²=0.021, P=0.346).

Conclusions  There were poor agreements between SOCT and HRT-3 for measurement of optic nerve parameters except cup area and cup volume. Measurement results of the two instruments are not interchangeable.

     

正常人OCT不同扫描直径视乳头圆周神经纤维层厚度研究

目的 采用光学相干断层扫描术(optical coherence tomography,OCT)观察正常人环绕视乳头圆周3.0 mm直径和3.46 mm直径视网膜神经纤维层(retinal nerve fiber layer,RNFL)厚度,评价两者之间的差异及其临床意义.方法 在本科行OCT检查的正常人98人112眼,采用Zeiss OCT 3000对同一检查者分别进行以视乳头为中心3.0 mm直径和3.46 mm直径的圆周环行扫描,结果用RNFL THICKNESS AVERAGE程序分析RNFL厚度.结果 正常人不同年龄组之间的RNFL厚度无显著性差异(P》0.05);2种扫描直径所测量的各象限RNFL厚度之间差异显著(P＜0.01);上、下象限之间厚度没有显著性差异(P》0.05),但与鼻、颞侧象限厚度之间具有显著性差异(P＜0.01).结论 OCT定量检测正常人RNFL厚度重复性较好,采用不同的扫描直径可提供不同的RNFL厚度值,为临床诊断提供依据.