Charbel Issa Peter, Finger Robert P, Holz Frank G, Scholl Hendrik P N
Department of Ophthalmology, University of Bonn, Bonn, Germany.
Invest Ophthalmol Vis Sci. 2009 Dec;50(12):5913-8. doi: 10.1167/iovs.09-3541. Epub 2009 Jun 24.
PURPOSE: To investigate the value of multimodal confocal scanning laser ophthalmoscopy (cSLO) for phenotyping fundus lesions in patients with pseudoxanthoma elasticum (PXE) and to correlate these findings with morphologic alterations detected by spectral domain optical coherence tomography (SD-OCT). METHODS: Imaging was performed with a combined SD-OCT-cSLO system (Spectralis HRA-OCT; Heidelberg Engineering, Heidelberg, Germany). OCT scans were placed at locations of interest on near-infrared (NIR) reflectance, fundus autofluorescence (FAF), and fluorescein angiography (FA) images. The instrument allowed for exact topographic correlation of findings on OCT and cSLO images. RESULTS: NIR reflectance imaging showed the highest sensitivity to detect angioid streaks and peau d'orange compared to FAF or FA. On OCT scans, angioid streaks reliably showed breaks in Bruch's membrane. Peau d'orange was associated with alternating reflectivity within Bruch's membrane. Characteristic mid-peripheral chorioretinal atrophies showed hyporeflective spaces involving the outer neurosensory retina. In eyes with pattern dystrophy like alterations, subneurosensory accumulation of material was observed within areas of increased FAF. CONCLUSIONS: SD-OCT in combination with cSLO imaging using NIR light locates the primary pathologic formations of angioid streaks and peau d'orange in Bruch's membrane. NIR reflectance imaging may be superior for detecting PXE-related fundus lesions at the level of Bruch's membrane, because the blue laser light that is used in FAF and FA is markedly absorbed by the pigment epithelium and therefore may only detect alterations if this cell layer is also affected. The findings indicate that multimodal cSLO and SD-OCT imaging of the outer retina allows for screening of PXE related retinal alterations.
目的:探讨多模式共焦扫描激光眼底镜检查(cSLO)在弹性假黄瘤(PXE)患者眼底病变表型分析中的价值,并将这些发现与光谱域光学相干断层扫描(SD-OCT)检测到的形态学改变相关联。 方法:使用组合式SD-OCT-cSLO系统(Spectralis HRA-OCT;德国海德堡海德堡工程公司)进行成像。OCT扫描置于近红外(NIR)反射率、眼底自发荧光(FAF)和荧光素血管造影(FA)图像上的感兴趣位置。该仪器可实现OCT和cSLO图像上发现的精确地形学关联。 结果:与FAF或FA相比,NIR反射率成像在检测血管样条纹和橘皮样改变方面显示出最高的敏感性。在OCT扫描中,血管样条纹可靠地显示出 Bruch 膜的中断。橘皮样改变与 Bruch 膜内交替的反射率相关。特征性的中周部脉络膜视网膜萎缩表现为涉及外层神经感觉视网膜的低反射间隙。在具有图案性营养不良样改变的眼中,在FAF增加的区域内观察到神经感觉下物质积聚。 结论:SD-OCT结合使用近红外光的cSLO成像可定位Bruch膜中血管样条纹和橘皮样改变的主要病理结构。NIR反射率成像在检测Bruch膜水平的PXE相关眼底病变方面可能更具优势,因为FAF和FA中使用的蓝光会被色素上皮显著吸收,因此只有当该细胞层也受到影响时才能检测到改变。这些发现表明,外层视网膜的多模式cSLO和SD-OCT成像可用于筛查PXE相关的视网膜改变。
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