研究目的
To identify the spatial distribution of exudative features of choroidal neovascularization in neovascular age-related macular degeneration (nAMD) based on the localization of intraretinal cystoid fluid (IRC), subretinal fluid (SRF), and pigment-epithelial detachment (PED).
研究成果
Automated analyses of large-scale datasets in a cross-sectional study of 1182 patients with active treatment-na¨?ve nAMD demonstrated low spatial correlation of SRF with IRC and PED in contrast to increased colocalization of IRC and PED. These morphological associations may contribute to our understanding of functional deficits in nAMD.
研究不足
The retrospective design and the lack of use of axial and volume information of pathomorphologic components obtainable from OCT images present limitations. Possible segmentation errors produced by the fully automated three-dimensional segmentation pose a further limitation.
1:Experimental Design and Method Selection:
This retrospective cross-sectional study included spectral-domain optical coherence tomography volume scans (6 3 6 mm) of 1341 patients with treatment-na¨?ve nAMD. IRC, SRF, and PED were detected on a per-voxel basis using fully automated segmentation algorithms. Two subsets of 37 volumes each were manually segmented to validate the automated results.
2:Sample Selection and Data Sources:
SD-OCT data of treatment-na¨?ve patients with nAMD enrolled in prospective, randomized, multicenter clinical trials were included.
3:List of Experimental Equipment and Materials:
Spectralis OCT (Heidelberg Engineering, Heidelberg, Germany) or Cirrus HD-OCT (Carl Zeiss Meditec, Dublin, CA, USA) were used for imaging.
4:Experimental Procedures and Operational Workflow:
The spatial correspondence of components was quantified by computing proportions of IRC-, SRF-, or PED-presenting A-scans simultaneously affected by the respective other pathomorphologic components on a per-patient basis.
5:Data Analysis Methods:
The median across the population is reported. Odds ratios between pairs of lesions were calculated and tested for significance pixel wise.
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