原发性开角型青光眼OCT评估视网膜神经纤维层厚度与视盘参数的关系

目的:使用光学相干断层成像术(OCT)评估原发性开角型青光眼(POAG)各个病程时期的视网膜神经纤维层(RNFL)与视盘参数的差异,从而探讨青光眼RNFL厚度的变化与盘沿面积和杯盘面积比(C/D AR)之间的关系,确定OCT检测参数对青光眼病程变化的参考意义。方法:应用OCT检查技术分别对40例(60只眼)的POAG患者的RNFL及视盘进行检测。数据包括颞侧(TEMP)、上方(SUP)、鼻侧(NAS)、下方(INF)RNFL厚度以及平均RNFL厚度与盘沿面积和C/D AR。按青光眼诊断标准和视野分期法分为早期、中期和晚期3组。比较和分析3组的RNFL变化趋势以及与视盘参数的相关性。结果:青光眼早期、中期和晚期3组之间RNFL和视盘参数的比较具有显著性差异(P<0.01)。RNFL平均厚度与盘沿面积有正相关性,r=0.719,P<0.01;与C/D AR有负相关性,r=-0.712,P<0.01。结论:POAG各个时期中RNFL厚度逐渐变薄,同时盘沿面积减少和C/D AR扩大。盘沿面积占影响RNFL厚度的因素比重较大,比C/D AR更能反映RNFL的变化。青光眼的病程发展能通过RNFL的减少变化来反映。OCT的客观检查所得的各项参数也对原发性青光眼的病情发展的评估具有一定的意义。     

应用海德堡视网膜断层扫描仪测量正常人群视盘参数

目的：应用海德堡视网膜断层扫描仪建立本地区正常人群视盘参数并做进一步分析。方法：用HRT-Ⅱ（heidelberg retiner tomographyⅡ海德堡视网膜断层扫描仪）对排除眼病的正常人146例292眼进行检查,按年龄分成4组,得出不同年龄组和所有年龄人群视盘各参数。结果：同一年龄组内左右眼、男女性视盘参数对比差异无统计学意义,故合并统计,测出不同年龄组和所有年龄人群视盘各参数的均值、标准差。其中,视盘面积、盘沿面积、轮廓线的高度变化、视杯形状测量、平均RNFL（retina nerve fiber layer视网膜神经纤维层）厚度、RNFL截面面积在不同年龄组差异有统计学意义,并且年龄与RNFL厚度及横截面积呈负相关,相关系数与P值分别为r=-0．297,P=0．000和r=-0．259,P=0．000;而视杯面积、容积、杯盘面积比、沿盘比、盘沿容积、平均和最大视杯深度、水平方向和垂直方向的杯盘比均不受年龄的影响。所有年龄人群视盘参数均值与白种人正常值参考范围相近。结论：HRT-Ⅱ可定量检测我国正常人视盘参数,且不同年龄视盘参数的均值与性别及眼别无关。在测量视盘参数时要注意年龄对视盘各参数的影响,随着年龄增长RNFL数量减少,厚度变薄。HRT-Ⅱ可用于区分正常及早期青光眼,为青光眼的筛查、早期诊断和随诊提供切实可靠的定量依据。在本研究的基础上扩大检验的样本量,建立我国正常人群视盘参数的正常值．     

盘沿容积与盘沿面积比在原发性开角型青光眼诊断作用的研究

目的探讨盘沿容积与盘沿面积比在原发性开角型青光眼（POAG）诊断中的作用．方法选取38例（76眼）正常人和62例（84眼）POAG患者．将所有人选按年龄分段，每隔10年为一段，共3段（31-40岁．41．50岁，51．60岁），用HRT检测视盘，对两组的盘沿容积（RV）与盘沿面积（RA）比进行比较．并将3组POAG的RV／RA、RV、RA分别与平均视野缺损（MD）的关系作一比较．结果RV／RA正常组与青光眼每个年龄段两组间差异均有显著性（P〈0．05）；只有41-50岁POAG组RV／RA与MD呈正相关，其余年龄POAG组RV／RA及所有RV、RA与MD均无相关性．结论盘沿容积与盘沿面积比在原发性开角型青光眼早期诊断中是一敏感参数．     

激光偏振光扫描测定不同病程开角型青光眼视网膜神经纤维层的厚度

【目的】探讨激光偏振光扫描仪对开角型青光眼诊断的临床应用价值。【方法】收集正常人159例252眼及不同病程开角型青光眼共107例175眼,采用激光偏振光扫描仪（GDxVCC）进行视网膜神经纤维层（RNFL）厚度测量,测量参数包括：RNFL厚度上方平均值、下方平均值、全周平均值、TSNIT标准差、双眼对称性及神经纤维层指数（NFI）。独立样本t检验比较正常组与青光眼组RNFL厚度及正常组与早期青光眼组RNFL厚度,单因素方差分析比较早、中、晚期青光眼RNFL厚度,对GDxVCC诊断青光眼的效能进行ROC曲线下面积分析。【结果】GDxVCC测量的正常人全周RNFL厚度为（58&#177;5）μm,青光眼患者全周RNFL厚度为（48&#177;11）μm,较正常人明显变薄（P〈0.001）。早期青光眼患者的全周、上方、下方RNFL厚度均较正常人变薄,差异有统计学意义（P=0.000）;但早期青光眼患者的双眼对称性仍较好,与正常人相比差异无统计学意义（P=0.058）。随着青光眼的进展,早、中、晚期青光眼患者的全周、上方、下方RNFL厚度明显变薄,TSNIT标准差及双眼对称性明显减低,神经纤维指数明显增高（P〈0.005）。GDxVCC各参数诊断青光眼的ROC曲线下面积达到0.743～0.992。【结论】GDxVCC可定性和定量测量RNFL厚度,其各参数诊断青光眼的效能较高,对青光眼的早期诊断有较高的临床应用价值。     

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。     

原发性开角型青光眼与正常眼HRT-Ⅱ视盘形态结构的对比研究

目的探讨Heidelberg视网膜断层扫描仪(HRT-Ⅱ)在原发性开角型青光眼(POAG)早期诊断中的意义。方法用HRT-Ⅱ对早期、进展期POAG30例(48眼)及正常人25例(50眼)的视盘进行断层扫描,获得视盘平均地形图像和视盘结构诸参数,将POAG视盘参数与视野平均缺损(MD)行相关性分析。结果POAG与正常人视盘结构各参数中视盘面积、视杯面积、盘沿面积、杯盘面积比、视杯容积、盘沿容积、平均视杯深度、最大视杯深度、轮廓线高度变化值、视杯形态测量、平均神经纤维层厚度存在明显差异,检测的视野平均缺损与HRT-Ⅱ视盘检测参数具有一致性。结论HRT-Ⅱ能够反映POAG视盘改变,与视野相关性好,为临床早期诊断POAG提供了依据。     

视网膜断层扫描仪测量广西汉族正常人群视盘参数的研究

目的了解本地区汉族正常人群视盘参数的正常值。方法将三代居住广西隆林县无血缘关系的120例正常汉族成年人纳入研究对象,运用海德堡视网膜断层扫描仪（Heidelberg retina tomograph-Ⅱ,HRT-Ⅱ）分别检测不同年龄段汉族人群视乳头地形图总体参数。结果正常汉族人视盘参数正常值：视盘面积（DA）为（2．2165±0．4266）mm^2,视杯面积（CA）为（0．4816±0．2979）mm^2,盘沿面积（RA）为（1．7311±0．3217）mm^2,视杯／视盘面积比值（C／DAR）为（0．2074±0．1092）,盘沿／视盘面积比值（R／DAR）为（0．7923±0．1091）,视杯容积（CV）为（0．1076）mm^3,盘沿容积（RV）为（0．5196±0．1519）mm^3,平均视杯深度（MCD）为（0．2055±0．0798）mm,最大视杯深度（MxCD）为（0．6039±0．1949）mm,视乳头轮廓线高度变化值（HVC）为（0．4513±0．1639）mm,视杯形态测量（CSM）为（-0．2155±0．0617）mm,平均视网膜神经纤维层厚度（mRN-FLT）为（0．3059±0．0845）mm,视网膜神经纤维层截面面积（RNFLA）为（1．5785±0．3830）mm^2。按年龄分成4组,正常汉族人mRNFLT、RNFLA在49岁以下与50岁以上比较差异有统计学极显著意义（P〈0．01）,而49岁以下各组之间比较差异无统计学意义（P〉0．05）。性别间各参数比较差异无统计学意义（P〉0．05）。眼别间比较差异元统计学意义（P〉0．05）。汉族C／DAR比值双眼差值范围为0．048～0．112。RV和HVC两个参数不受视盘大小影响。结论HRT-Ⅱ可定量检测广西汉族正常人视盘参数,且不同年龄视盘参数的均值与性别及眼别无关,RV和HVC可做为一个评价指标。     

屈光度和眼轴长度对豚鼠视网膜神经纤维层厚度和视乳头形态的影响

目的 使用光学相干断层扫描（optical coherence tomography,OCT）观察豚鼠视网膜神经纤维层 (retinal nerve fiber layer，RNFL)厚度及视乳头形态，并探讨豚鼠等效球镜和眼轴长度与这些参数的相关性。方法 选用20只普通级豚鼠，进行等效球镜和眼轴长度测量，以及运用OCT观察豚鼠RNFL厚度及视乳头形态。结果 豚鼠等效球镜与RNFL平均厚度、上方RNFL厚度、颞侧RNFL厚度、下方RNFL厚度、鼻侧RNFL厚度呈正相关；而眼轴长度与RNFL平均厚度、上方RNFL厚度、颞侧RNFL厚度、下方RNFL厚度、鼻侧RNFL厚度呈负相关。等效球镜和眼轴长度与盘沿面积、视盘面积、平均杯盘比、杯容积无相关性。等效球镜和垂直杯盘比无相关性，而眼轴长度与垂直杯盘比存在正相关。结论 等效球镜和眼轴长度对豚鼠各方位RNFL厚度均有影响。在使用豚鼠作为高眼压动物模型时，需考虑其屈光状态和眼轴长度的影响。     

RNFL和GCC在慢性闭角型青光眼神经损伤评价中的意义

目的探讨视网膜视盘周围神经纤维层（retinanervefiberlayer，RNFL）厚度和黄斑区神经节细胞复合体（ganglioncellcomplex，GCC）厚度在评价慢性闭角型青光眼神经损伤中的意义。方法按视野缺损程度将慢性闭角型青光眼患者分成轻度、中度、重度视野缺损组。测量3组的RNFL平均厚度（AVGRNFL）、上方厚度（SUPRNFL）及下方厚度（INFRNFL）和GCC平均厚度（AVGGCC）、上方厚度（SUPGCC）及下方厚度（INFGCC）。计算各个参数的ROC曲线，AUC越大（越接近1）则诊断价值越大。多元线性回归分析慢性闭角型青光眼视野缺失与RNFL及GCC的相关性。结果轻/中度视野缺损组与重度视野缺损组AVGRNFL、SUPRNFL、INFRNFL、AVGGCC、SUPGCC、INFGCC差异均有统计学意义（均P＜0.01）；轻度视野缺损组与中重度视野缺损组间RNFL和GCC厚度的AUC比较，以INFGCC的AUC最大（0.801），诊断灵敏度最大。慢性闭角型青光眼视野缺损值与SUPRNFL（B=-0.156，P＜0.05）和INFGCC（B=-0.450，P＜0.01）均呈负相关。结论RNFL和GCC厚度是青光眼视神经损伤结构定量检测的重要指标，其中以INFGCC厚度参数灵敏度最高，与视野缺损呈高度负相关。需要开发更先进的技术和相关软件来获取早期青光眼的视神经结构损伤。     

Characteristics of optic disc parameters and its association in normal Chinese population: the Handan Eye Study

Background Assessment of the optic disc and retinal nerve fiber layer （RNFL） is essential for the diagnosis and monitoring of glaucoma.Knowledge of normal optic disc topography provides a benchmark for evaluating glaucomatous pathologic changes,especially in its early stages.The purpose of this study was to evaluate the characteristics and correlation factors of the optic disc parameters using the Heidelberg Retina Tomograph Ⅱ （HRT Ⅱ） in a large sample of normal eyes of adult Chinese subjects.Methods Disc data were obtained from 6 830 subjects aged ＞30 years from the Handan Eye Study.All participants underwent comprehensive eye examinations and physical examinations.The associations of gender,age,body mass index,blood pressure,waist-to-hip ratio; refractive error,intraocular pressure,axial length,and disc area were assessed using simple and multiple regression analysis.The correlation between HRT Ⅱ parameters was evaluated.Results Of the 7 557 eligible subjects,6 830 took part in the study （90.4％ response rate） and 2 633 normal eyes with good-quality HRT Ⅱ images were selected.The mean disc area was 2.28 mm2 （standard deviation （SD） 0.43） and mean neural rim area was 1.80 mm2 （SD 0.29）.In multiple regression analysis,optic disc area significantly correlated with age,gender,and axial length （P ＜0.001）.All optic disc parameters showed a significant correlation with disc area （0.054 ＜r ＜0.736,P ＜0.01）.The association between mean RNFL thickness and rim area is statistically significant but not strong （regression linear equation：rim area =1.42 × mean RNFL thickness ＋ 1.32 mm2,P ＜0.001; R2=0.070）.The global RNFL cross-sectional area was significantly associated with global rim area （regression linear equation：rim area =1.14× RNFL cross-sectional area ＋ 0.44 mm2,P ＜0.001; R2 =0.271）.Conclusions The optic disc area in rural Chinese population is larger than reported in white and Japanese populations,similar to that of Indian population and urban Chinese population.Most optic disc measurements were moderately or weakly affected by disc area.In addition to the RNFL,there may be other factors affecting the rim area.The relationship between optic disc and axial length may suggest a link between larger disc area,thinning of the lamina cribrosa,and increased glaucoma susceptibility in myopic eyes.     

原发性开角型青光眼视网膜神经纤维层厚度和视野平均缺损的相关性分析

目的 比较原发性开角型青光眼患者GDx VCC各参数和自动视野平均缺损(MD)的相关性.方法 用GDx VCC和Octopus1-2-3自动视野检测97例(191眼)原发性开角型青光眼患者.采用方差分析、Pearson相关分析和回归分析GDx各参数和自动视野平均缺损(mean defect,MD)之间的关系.结果 GDx各参数与视野的MD均呈负相关,相关性依次为:SA(-0.58)、TSNIT(-0.52)、IA(-0.52)、NFI(-0.48)和IES(-0.33),差异有统计学意义.上半野视野与GDx下象限RNFL厚度参数一致性为-0.61,下半野视野与GDx上象限RNFL厚度参数的一致性为-0.59.结论 GDx参数和自动视野的平均缺损呈中度相关.GDx可用于青光眼的随诊.

Abstract：

Objective To establish whether the structural parameters provided by GDx can be used to reflect functional damage in the mean defect of visual field. Methods 97 ( 191 eyes) patients with primary open angle glaucoma underwent examination with GDx and Octopus 1-2-3 automatic perimeter. The relationship between the retinal nerve fiber layer parameters and mean defect of visual field was analysed by ANOVA, Pearson's correlation (r), scatter plot and linear regression. Results The parameters of GDx decreased with increasing mean defect of visual field, measured both globally and regionally; r: SA=- 0.58, TSNIT =-0.52, IA=-0.52, NFI=-0.48 and IES=-0.33. All parameters were negative correlation with mean defect of visual field and there was significant correlation among these parameters,except IES(P＜0.05). The superior mean defect of visual field increased with decreasing inferior RNFL (r=-0.61), inferior visual field mean defect increased with decreasing superior RNFL (r=-0.59).There were significant correlation among these parameters. Conclusion Quantitative measures of the retinal nerve fiber layer using GDx were correlated with mean defect of visual field in patients with glaucoma. GDx can be used for follow up.     

HRT-II在原发性慢性闭角型青光眼诊断中的应用

目的探讨海德堡视网膜断层扫描仪（HRT-II）在原发性慢性闭角型青光眼（CPACG）诊断中的意义。方法对30例（60眼）CPACG患者进行HRT-II检测及视野检查，统计分析HRT-II检测敏感性、病变分区特点及视盘参数与视野平均缺损的相关性。结果①60眼中视野异常53眼，HRT-II检测异常54眼；视野异常和HRT-II异常对应为98．15％；单眼视野组8例中有对侧2眼视野检测正常而HRT-II检测异常，对侧5眼视野检测正常而HRT-II检测也正常，对侧1眼HRT-II检测正常而视野检测异常。颞下象限盘沿面积异常率最高；②盘沿面积、杯，盘面积比、盘沿容积、视杯形态测量与视野平均缺损呈直线相关。结论HRT-II检查敏感性良好，与视野检查有良好的对应关系，可以用于CPACG患者视神经损害的监测及早期诊断。     

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.

     

Retinal nerve fiber layer in primary open-angle glaucoma with high myopia determined by optical coherence tomography and scanning laser polarimetry with variable corneal compensation

Background Fundus changes associated with high myopia (HM) may mask those associated with primary open-angle glaucoma (POAG). Characteristic retinal nerve fiber layer (RNFL) thickness profiles in patients with POAG and HM were examined using optical coherence tomography (OCT) and scanning laser polarimetry with variable corneal compensation (GDxVCC), and the diagnostic capabilities of these imaging modalities were compared. Methods Twenty-two eyes with POAG and HM (spherical equivalent [SE] between -6.0 and -12.0 D) were evaluated, and 22 eyes with HM were used for comparison. RNFL parameters evaluated included superior average (Savg-GDx), inferior average (Iavg-GDx), temporal-superior-nasal- inferior-temporal (TSNIT) average, and nerve fiber indicator (NFI) on GDxVCC and superior average (Savg-OCT), inferior average (Iavg-OCT), nasal average (Navg-OCT), temporal average (Tavg-OCT), and average thickness (AvgThick-OCT) on OCT (fast RNFL scan). Visual field testing was performed and defects were evaluated using mean defect (MD) and pattern standard deviation (PSD). Results The RNFL parameters (P < 0.05) that were significantly different between groups included Savg-GDx, Iavg-GDx, TSNIT average, NFI, Savg-OCT, Iavg-OCT, Tavg-OCT, and AvgThick-OCT. Significant correlations existed between TSNIT average and AvgThick-OCT (r = 0.778), TSNIT average and MD (r = 0.749), AvgThick-OCT and MD (r = 0.647), TSNIT average and PSD (r = -0.756), and AvgThick-OCT and PSD (r = -0.784). The area under the receiver operating characteristic curve (AUROC) values of TSNIT average, Savg-GDx, Iavg-GDx, NFI, Savg-OCT, Iavg-OCT, Navg-OCT, Tavg-OCT, and AvgThick-OCT were 0.947, 0.962, 0.973, 0.994, 0.909, 0.917, 0.511, 0.906, and 0.913, respectively. The NFI AUROC was the highest value. Conclusion RNFL thickness was significantly lower in all but the nasal quadrant in patients with POAG and HM, compared to patients with only HM. Measurements with OCT and GDxVCC were well-correlated, and both modalities detected RNFL thickness changes. However, GDxVCC was better than OCT in detecting POAG in HM patients.     

Retinal nerve fiber layer in primary open-angle glaucoma with high myopia determined by optical coherence tomography and scanning laser polarimetry

Background Fundus changes associated with high myopia (HM) may mask those associated with primary open-angle glaucoma (POAG).This study aim to determine the characteristics of RNFL thickness changes in...     

光学相干断层扫描仪在多发性硬化患者中的初步应用

目的：利用光学相干断层扫描仪（OCT）评估多发性硬化（MS）患者与正常人眼视网膜神经纤维层（RNFL）厚度和黄斑中心凹厚度及体积的差异,评估OCT监测MS患者病程中轴突缺失的意义。方法选取MS患者30例（60眼）,根据有无视神经炎（ON）发作史分为MS- ON组（41眼）和MS- NON组（19眼）,同时选择年龄和性别相匹配的健康体检者30例（60眼）为对照组。对3组受试者均进行详细的眼科检查,并使用OCT测定RNFL厚度和黄斑参数。采用单因素方差分析对3组的RNFL厚度、黄斑中心凹厚度和体积的差异进行分析。结果两组MS患者的RNFL厚度和黄斑参数与对照组均有统计学差异,MS- ON组和MS- NON组之间的RNFL厚度和黄斑参数也有差异（均P＜0.05）。结论 OCT可作为MS诊断的辅助检查手段。     

不同年龄正常人群视乳头形态结构检测

目的建立正常人视乳头形态结构参数的正常值,探讨性别、眼别、年龄对视盘参数的影响。方法应用海德堡视网膜断层扫描仪（HRT）对300例（600眼）正常人视乳头结构进行扫描,按年龄分成5组,获取视盘参数值并分析性别、眼别、年龄和参数的关系。结果300例（600只眼）视盘面积（DA）为（2.1969±0.4611）mm2,视杯面积（CA）为（0.5262±0.3204）mm2,盘缘面积（RA）为（1.6627±0.3774）mm3,杯盘面积比（C/DR）为0.2307±0.1150,视杯容积（CV）为（0.1209±0.1175）mm3,盘缘体积（RV）为（0.4983±0.1571）mm3,杯的平均深度（MCD）为（0.2286±0.0951）mm,视杯的最大深度（MxCD）为（0.6498±0.2343）mm,沿轮廓线的视网膜表面的高度变化最大值（HVC）为（0.4582±0.1400）mm,视杯三维形状的测量值（CSM）为（-0.1911±0.0697）mm,平均视网膜神经纤维层厚度（mRNFLT）为（0.2964±0.0742）mm,平均视网膜神经纤维层截面面积（RNFLA）为（1.5210±0.3875）mm2。300例视盘参数不同眼、不同性别差异无显著性（〉0.05）。44岁以前与44岁以后的各年龄组比较mRNFLT、RNFLA差异有显著性（〈0.05）,而44岁以前的各年龄组比较差异无显著性（〉0.05）。结论正常人视乳头参数值变异较大,随年龄增加,视网膜神经纤维层逐渐变薄,年龄越大退变越明显。视盘参数不同眼、不同性别差异无显著性。     

DTI技术多参数值对原发性开角型青光眼视路损伤程度的诊断价值

目的探讨3．0TMRI-DTI技术多参数值评价原发性开角型青光眼（POAG）视路损害程度的检测价值。方法对30例原发性开角型青光眼患者及35例健康人行DTI检查。原始图像后处理重建DTI参数图,测量视神经、视放射的平均DTI参数图。结果①视神经、视放射Dav值与POAG临床分期呈正相关（P〈0．05）;FA值与POAG临床分期呈负相关（P〈0．05）;视神经VrA值与POAG临床分期呈负相关（P〈0．05）;RA值与POAG临床分期无相关性（P〉0．05）。②与匹配的正常人对比,青光眼视神经与视放射差值分析Day、FA、RA、VrA,差异有统计学意义（P〈0．05）。结论DTI部分参数值可以用来判断原发性开角型青光眼视路损害的严重程度。