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Assessment of wide-field optical coherence tomography angiography using modified extended field imaging technique Hirotsugu Kasamatsu 1 , Takao Hirano 1 , Junya Kitahara 1 , Shinji Kakihara 1 , Yuichi Toriyama 1 , Toshinori Murata 1 1Department of Ophthalmology, Shinshu University School of Medicine pp.1085-1090
Published Date 2018/8/15
DOI https://doi.org/10.11477/mf.1410212780
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Abstract Purpose:To compare wide-field optical coherence tomography angiography(OCTA)with a modified extended field(M-EFI)to OCTA with EFI technique for evaluating field of view and subjection evaluation in healthy subjects.

Methods:OCTA images of 12 mm×12 mm were acquired using 3 methods(original, EFI, and M-EFI)of 6 eyes from 6 normal individuals(mean age:33±6 years)without apparent ocular disorders. EFI and M-EFI were compared for magnitude of field of view using original OCTA images and subjection evaluation by absolute category rating(ACR).

Results:The mean extension ratios of OCTA images with EFI in the horizontal and vertical directions were significantly higher than those with M-EFI(horizontal:1.30±0.06 vs. 1.11±0.03, p=0.03;vertical:1.30±0.08 vs. 1.10±0.03, p=0.03)and EFI enabled evaluation of significantly larger areas of the fundus(1.69±0.18 vs. 1.22±0.06, p=0.01). In contrast, subjective evaluation of OCTA images with M-EFI was significantly higher than that with EFI(mean ACR score:4.06±1.00 vs. 2.77±0.97, p<0.001;median:4 vs. 3).

Conclusions:OCTA with M-EFI allows for acquisition of wide-field en face retinal images with greater subjective satisfaction.


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電子版ISSN 1882-1308 印刷版ISSN 0370-5579 医学書院

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