一种包括 +20-D 透镜的附件，用于在广角光学相干断层扫描血管造影中获取扩展视野图像。
An Attachment Including a +20-D Lens to Gain Extended Field Images in Wide-Angle Optical Coherence Tomography Angiography.
作者信息
Sawada Osamu, Mori Takamasa, Ichiyama Yusuke, Obata Shumpei, Kakinoki Masashi, Sawada Tomoko, Saishin Yoshitsugu, Ohji Masahito
机构信息
Department of Ophthalmology, Shiga University of Medical Science, Otsu, Shiga, Japan.
出版信息
J Vitreoretin Dis. 2019 Nov 8;4(3):210-213. doi: 10.1177/2474126419885332. eCollection 2020 Jun.
PURPOSE
This article evaluates the clinical usefulness of an attachment involving a +20-D lens to gain extended field images on wide-angle optical coherence tomography angiography (OCTA).
METHODS
An attachment with a +20-D lens was developed to take OCTA images of anterior segments, and it was used to obtain extended field images of the posterior segment in this study. Ten eyes of 5 individuals who did not have a history of ocular or systemic disease underwent wide-angle OCTA with a 12 × 12-mm center field using the PLEX Elite 9000 with and without the attachment. The ratio of the area of the center field to the area of the extended field with the attachment was calculated.
RESULTS
The mean area of the center image was 125 disc areas and that of the field extended by the attachment was 210 disc areas. The mean ratio between the center field and the extended field was 1.67.
CONCLUSIONS
The attachment involving the +20-D lens seems to be clinically useful to gain extended field images on wide-angle OCTA.
目的
本文评估一种包含+20D透镜的附件在广角光学相干断层扫描血管造影（OCTA）上获取扩展视野图像的临床实用性。
方法
开发了一种带有+20D透镜的附件用于获取眼前节的OCTA图像，在本研究中用其获取眼后节的扩展视野图像。对5名无眼部或全身性疾病史的个体的10只眼，使用PLEX Elite 9000在有和没有该附件的情况下进行12×12mm中心视野的广角OCTA检查。计算中心视野面积与使用附件后的扩展视野面积之比。
结果
中心图像的平均面积为125个视盘面积，附件扩展后的视野平均面积为210个视盘面积。中心视野与扩展视野之间的平均比例为1.67。
结论
包含+20D透镜的附件在广角OCTA上获取扩展视野图像似乎具有临床实用性。
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