We present a SMART injector with two parallel common-path optical coherence tomography fibers to enable angle measurements and injection depth corrections for oblique subretinal injection. The two optical fibers are attached to opposite sides of a 33 G needle with known offsets and designed to pass through a 23 G trocar that has an inner diameter of 0.65 mm. By attaching a SMART system to a rotational stage, the measured angles are calibrated for minimal error from reference angles. A commercial eye model was used to evaluate the control performance, and injection experiments were performed on a phantom made of agarose gel and a porcine eye.

中文翻译：

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通过两个平行的OCT传感器引导的手持式SMART进样器进行倾斜进样深度校正

我们提出了一种SMART注射器，该注射器具有两条平行的共路径光学相干断层扫描纤维，能够进行角度测量和用于倾斜视网膜下注射的注射深度校正。两条光纤以已知的偏移量连接到33 G针的相对侧，并设计为穿过内径为0.65 mm的23 G套管针。通过将SMART系统安装到旋转平台上，可以对测量角度进行校准，以使参考角度的误差最小。使用商业眼模型评估控制性能，并在由琼脂糖凝胶和猪眼制成的体模上进行注射实验。