GDx VCC在原发性开角型青光眼中的诊断价值

目的评价GDx VCC在原发性开角型青光眼(POAG)中的诊断价值。方法对127名正常人(眼压、视野和视乳头形态均正常)和133例POAG患者[眼压＞21mm Hg(1mm Hg=0．133 kPa)、有典型的视乳头形态改变和(或)典型的青光眼性视野变化]进行GDx检查,记录TSNIT(颞侧一半、上方、鼻侧、下方、颞侧另一半)平均值、上方平均值、下方平均值、TSNIT标准差和神经纤维层厚度指示值(NFI)。计算并比较各指标的受试者工作特性曲线下面积(AUC),并作检验。然后计算诊断价值最高的指标的灵敏度、特异度和阳性似然比,此外分别计算早、中和晚期POAG的AUC。结果TSNIT平均值、上方平均值、下方平均值、TSNIT标准差和NFI的AUC分别为0．94、0．94、0．93、0．92和0．97。与其他指标相比,NFI的AUC最大(P值均＜0．05)。当NFI临界点值为30时,其灵敏度和特异度分别为91．0%和95．3%,阳性似然比为19．3。仅就NFI而言,早、中和晚期POAG的AUC分别为0．94、0．99和0．99。当NFI临界点值为30时,早、中和晚期POAG的灵敏度分别为82．2%、94．0%和97．4%,特异度为95．3%。结论GDx VCC各项指标均能较好地区别正常人与POAG患者, NFI是诊断价值最高的指标。     

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 ± 5) μm,青光眼患者全周RNFL厚度为(48 ± 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。     

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。     

无糖尿病视网膜病变表现的糖尿病患者视网膜神经纤维层厚度的研究

目的 研究糖尿病患者是否存在视网膜神经纤维层(retinal nerve fiber layer,RNFL)的变薄,并分析RNFL厚度和若干糖尿病危险因素之间的相关性.方法 42位2型糖尿病患者(47～70岁)被纳入该研究.所有患者接受常规眼科检查和GDxVCC神经纤维分析仪检查(包括可变角膜补偿模式VCC和强化角膜补偿模式ECC).GDx测量参数包括:颞侧-上方-下方-鼻侧-颞侧平均(TSNITave),上方平均(Superiorave),下方平均(Inferiorave),TSNIT标准差(TSNITstdDev)和神经纤维指数(NFI).通过计算受试者工作曲线(ROC)分析各指标的诊断能力,并研究相关危险因素与NFI值之间的关系.结果 在ECC和VCC检测模式下,NFI值的ROC曲线下面积均是最大的.年龄增长和视网膜神经纤维层变薄之间存在统计学意义的相关性.然而,在糖尿病病程和空腹血糖与RNFL 厚度之间未发现具统计学意义的相关性.年龄对糖尿病患者的NFI检测值的影响大于对正常对照人群NFI值的影响.结论 年龄因素对糖尿病患者的NFI值具有重要影响.眼底尚表现正常的糖尿病患者可能已存在视网膜神经纤维层变薄.     

年龄对正常成年人视网膜神经纤维层厚度的影响

 目的 使用偏振激光扫描仪对部分健康的中国成年人视网膜神经纤维层（RNFL）厚度进行测定,评估年龄和RNFL厚度之间的关系。方法 使用GDxVCC神经纤维分析仪的两种不同检测模式（可变角膜补偿,VCC;强化角膜补偿,ECC）测定150例患者共150眼的视网膜神经纤维层厚度。测量参数包括：颞侧-上方-鼻侧-下方-颞侧平均（TSNITave）、上方平均（Superiorave）、下方平均（Inferiorave）、TSNIT标准差（TSNITstdDev）。和神经纤维指数（NFI）。结果 VCC检测模式得到的TSNITave、Superiorave、Inferiorave、TSNITstdDev、NFl平均值分别为（57.12±6.26）,（69.35±4.21）,（67.59±7.06）,（25.46±4.02）,（17.35±7.59）。ECC检测模式五项检测值分别为：（56.15±5.32）,（68.24±6.63）,（66.90±2.40）,（24.80±6.76）,（18.84±8.51）。VCC和ECC模式的检测值之间的差异不具统计学意义。在总样本人群中检测参数指标与年龄存在统计学意义的相关性。而在40岁以上人群中检测参数指标与年龄未发现相关性。结论 VCC和ECC模式对检测150例正常国人视网膜神经纤维层厚度的检测值之间不存在统计学差异。对21～70岁的健康人眼中,RNFL厚度检测值随年龄增长而变薄,但在40岁以上人群中未见此改变。     

无糖尿病视网膜病变表现的糖尿病患者视网膜神经纤维层厚度的研究(英文)

目的研究糖尿病患者是否存在视网膜神经纤维层（retinal nerve fiber layer,RNFL）的变薄,并分析RNFL厚度和若干糖尿病危险因素之间的相关性。方法42位2型糖尿病患者（47～70岁）被纳入该研究。所有患者接受常规眼科检查和GDxVCC神经纤维分析仪检查（包括可变角膜补偿模式VCC和强化角膜补偿模式ECC）。GDx测量参数包括：颞侧-上方-下方-鼻侧-颞侧平均（TSNITave）,上方平均（Superiorave）,下方平均（Inferiorave）,TSNIT标准差（TSNITstdDev）和神经纤维指数（NFI）。通过计算受试者工作曲线（ROC）分析各指标的诊断能力,并研究相关危险因素与NFI值之间的关系。结果在ECC和VCC检测模式下,NFI值的ROC曲线下面积均是最大的。年龄增长和视网膜神经纤维层变薄之间存在统计学意义的相关性。然而,在糖尿病病程和空腹血糖与RNFL厚度之间未发现具统计学意义的相关性。年龄对糖尿病患者的NFI检测值的影响大于对正常对照人群NFI值的影响。结论年龄因素对糖尿病患者的NFI值具有重要影响。眼底尚表现正常的糖尿病患者可能已存在视网膜神经纤维层变薄。     

年龄对正常成年人视网膜神经纤维层厚度的影响(英文)

目的使用偏振激光扫描仪对部分健康的中国成年人视网膜神经纤维层（RNFL）厚度进行测定,评估年龄和RNFL厚度之间的关系。方法使用GDxVCC神经纤维分析仪的两种不同检测模式（可变角膜补偿,VCC;强化角膜补偿,ECC）测定150例患者共150眼的视网膜神经纤维层厚度。测量参数包括：颞侧-上方-鼻侧-下方-颞侧平均（TSNITave）、上方平均（Superiorave）、下方平均（Inferiorave）、TSNIT标准差（TSNITstdDev）、和神经纤维指数（NFI）。结果VCC检测模式得到的TSNITave、Superiorave、Inferiorave、TSNITstdDev、NFI平均值分别为（57.12&#177;6.26）,（69.35&#177;4.21）,（67.59&#177;7.06）,（25.46&#177;4.02）,（17.35&#177;7.59）。ECC检测模式五项检测值分别为：（56.15&#177;5.32）,（68.24&#177;6.63）,（66.90&#177;2.40）,（24.80&#177;6.76）,（18.84&#177;8.51）。VCC和ECC模式的检测值之间的差异不具统计学意义。在总样本人群中检测参数指标与年龄存在统计学意义的相关性。而在40岁以上人群中检测参数指标与年龄未发现相关性。结论VCC和ECC模式对检测150例正常国人视网膜神经纤维层厚度的检测值之间不存在统计学差异。对21～70岁的健康人眼中,RNFL厚度检测值随年龄增长而变薄,但在40岁以上人群中未见此改变。     

操作者的学习效果及内感受器的可重复性在应用可调角膜代偿的扫描激光偏振仪过程中的研究

目的:探讨操作者在应用新近引入的GDx VCC可调角膜代偿的扫描激光偏振仪过程中学习效果的影响及定量研究内感受器的可重复性问题。设计:前瞻性仪器应用研究。受试者:3位初次使用GDx VCC的操作者随机对30例受试者的一只眼进行测量(包括15例青光眼患者和15例正常对照者)。方法:每次3位操作者以随机顺序对受试者进行测量,分析GDx测量的5个参数:平均TSNIT(分别代表颞侧、上侧、鼻侧、下侧及颞侧)厚度、TSNIT标准差、平均上象限厚度、平均下象限厚度及神经纤维指数(N FI)。主要观察指标:操作者之间测量的视网膜神经纤维层(RNFL)厚度G…     

GDX与OCT在测量RNFL厚度中的应用比较

目的 探讨光学相干断层扫描仪（OCT）与激光偏振仪（GDx）测量视网膜神经纤维层厚度中的作用。方法 采用配对对比法,选取42例80只眼,均予OCT、GDx测量视盘一周视网膜神经纤维层厚度,对结果进行对比。结果 OCT与GDx测量视盘上方、下方和全周平均RNFL厚度值差异显著。对两者相应部位RNFL厚度进行相关分析发现两者呈高度正相关。结论 在人眼视网膜神经纤维层厚度（RNFL）测量中OCT与GDx具有较好的敏感性与一致性,两者均可作为青光眼视网膜神经纤维层厚度（RNFL）病变的有效检测手段。     

OCT测量视网膜神经纤维层厚度的可重复性分析

目的:分析光学相干断层扫描技术测量原发性开角型青光眼(primary open-angle glaucoma,POAG)视网膜神经纤维层(Retinal Nerve Fiber Layer,RNFL)厚度的可重复性.方法:顺序选取2009年6月至2010年6月之间来自我院眼科就诊的POAG患者50例50眼,采用双盲法,检查者A和检查者B间隔4小时对被检查者进行RNFL程序的扫描,每位被检查者扫描5次,取质量清晰信号强度指数较大(均大于50)的4幅图像的RNFL厚度值为当次被检查者的厚度值,次日和隔日进行同样的检查操作.记录全周平均RNFL厚度及颞侧、上方、鼻侧、下方RNFL厚度,计算检查者A和B测量RNFL厚度值的变异系数,利用SPSS 13.0统计软件,变异系数(Coefficient of Variation,CV)分析测量数据的可重复性,两操作者之间变异系数比较采用配对t检验.结果:操作者A利用OCT测量POAG全周平均RNFL厚度及颞侧、上方、鼻侧、下方RNFL厚度的CV分别为:(2.00±1.02)%、(6.44±1.49)%、(4.34±0.79)%、(5.73±1.22)%、(2.73±0.72)%;操作者B利用OCT测量全周平均RNFL厚度及颞侧、上方、鼻侧、下方RNFL厚度的CV分别为:(2.29±0.84)%、(6.23±1.17)%、(4.64±0.86)%、(6.10±0.81)%、(2.99±0.53)%;操作者A、B两者之间利用OCT测量全周平均RNFL厚度及颞侧、上方、鼻侧、下方RNFL厚度的CV值均无统计学差异(P＞0.05).结论:OCT测量POAG患者RNFL厚度具有较好的可重复性,可以作为一种精确可靠的RNFL厚度的定量检测工具.     

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...     

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.     

视盘三维参数对青光眼视神经损害评价的应用研究

目的通过对海德堡视网膜断层扫描仪Ⅱ型（HRT-Ⅱ）视盘参数与激光扫描偏振仪（GDX）视网膜神经纤维层（RNFL）厚度的相关性分析,探讨HRT-Ⅱ盘沿参数对青光眼视神经损害的评价。方法使用HRT-Ⅱ和GDX仪器对原发性慢性闭角型青光眼患者51例（73眼）,进行视盘参数和RNFL厚度测量,并进行视盘参数与RNFL厚度的相关分析。结果 RNFL厚度与盘沿面积（RA）、盘沿体积（RV）无相关性;RNFL厚度全周平均值与盘沿面积/视盘面积（RA/DA）、盘沿体积/视盘体积（RV/DV）呈正相关（=0.430、0.444,〈0.05）;视神经纤维指数（NFI）与盘沿面积/视盘面积（RA/DA）、盘沿体积/视盘体积（RV/DV）呈负相关（=-0.564、-0.545,〈0.01）;RNFL厚度上方平均值与上方盘沿体积/上方视盘体积（SRV/SDV）呈正相关（=0.472,〈0.05）;RNFL厚度下方平均值与下方盘沿体积/下方视盘体积（IRV/IDV）呈正相关（=0.426,〈0.05）。结论 HRT-Ⅱ视盘参数中,应用盘沿/视盘参数优于直接应用RA、RV参数,应用RV/DV三维参数优于RA/DA参数。     

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.     

偏执型精神分裂症和双相情感障碍躁狂患者脑灰质体积的比较分析

目的 采用优化的基于体素的形态学(voxel based morphometry,VBM)方法,比较偏执型精神分裂症、双相情感障碍躁狂患者脑灰质体积的差异.方法 运用3.0T磁共振扫描仪对符合美国精神障碍诊断统计手册第4版(DSM-Ⅳ)诊断标准的20例偏执型精神分裂症住院患者、20例双相情感障碍躁狂相住院患者和20例正常对照进行3D T1像扫描.在SPM2平台上,以优化的VBM方法 对高分辨T1加权图像进行处理,比较上述研究对象脑灰质体积的差异.结果 与正常对照比较,偏执型精神分裂症患者右侧颞中回、颞下回,左侧颞上回灰质体积减少,而双侧额下回、双侧屏状核灰质体积增加.双相情感障碍躁狂患者与正常对照比较出现灰质体积减少的脑区包括双侧尾状核,右侧颞叶颞上、中、下回,灰质体积增加的脑区包括左侧顶叶中央后回、双侧楔前叶、右侧额上回、左侧扣带回.偏执型精神分裂症患者与双相情感障碍躁狂患者相比左侧颞上回、左侧额下回、右侧尾状核体灰质体积增加.结论 偏执型精神分裂症患者与双相情感障碍躁狂患者既存在不同脑区的灰质体积的改变,也存在共同的右侧颞叶灰质体积改变.     

A study on central corneal thickness and optic disc size in patients with primary open angle glaucoma

The aim of the study was to evaluate a possible relationship between central corneal thickness (CCT) and optic disc area in patients with primary open angle glaucoma (POAG). Patients with POAG and age matched control group underwent routine ocular examination along with optic nerve head evaluation by Stratus optical coherence tomography (OCT) and CCT measurement by ultrasound pachymetry. Pearson's coefficient was calculated in both groups to find out correlation between these two parameters. In this series 90 eyes of 45 control subjects and 94 eyes of 47 POAG patients were studied. In the control group 40% were female, 60% male and among the POAG patients 34% female, 66% male. Mean CCT in control subjects was 566.98 micron (SD = 19.36, n = 90) and in POAG patients was 526.61 micron (SD = 29.93, n = 94). There was a significant difference in two groups (p = 0.0002). Disc area in control group had mean of 2.32mm(2) (SD = 0.305, n = 90) and in POAG group 2.982mm(2) (SD = 0.566, n = 94). Statistically significant difference was found among the two groups (p = 0.0). CCT was inversely correlated with optic disc size. In control subjects, r = -0.141, but it was not statistically significant (p = 0.092). In POAG group, r = -0.256 and the correlation was statistically significant (p = 0.0063). CCT was significantly less in POAG patients compared to control subjects. Mean disc area was significantly higher among the POAG group compared to control subjects. CCT was inversely correlated with disc area in both groups, but was statistically significant in POAG patients.     

首发与复发抑郁症患者静息态下脑局部一致性差异的功能磁共振成像研究

目的 探讨静息态下重性抑郁症首发与复发患者的脑功能特点及其差异.方法 首发与复发抑郁患者各14例及15例健康者参加磁共振扫描.结果 较健康组,首发抑郁组右额下回、左颞上回、左颞中回、左颞下回、左前扣带回腹侧、右后扣带回、左海马、左海马旁回、左尾状核、左豆状核及左屏状核局部一致性(ReHo值)减低,而右梭状回ReHo值增高;复发抑郁组双侧额上回、双侧额中回、左额下回、左颢上回、左颞中回、左颢下回、双侧后扣带回、左海马及左海马旁回ReHo值减低,而左缘上回ReHo值增高.复发较首发抑郁组左颞中回、左颞下回及右眶额皮质ReHo值增高,而右额中回、右楔前叶、右后扣带回及右海马旁回ReHo值减低.结论 首发与复发抑郁患者脑功能均存在异常,两者的异常有共同点,也有各自特征,且首发与复发患者脑功能存在明显差异.