Design and evaluation of an intraocular B-scan OCT-guided 36-gauge needle

Jin H. Shen; Karen M. Joos M.D.

doi:10.1117/12.2078431

12 March 2015 Design and evaluation of an intraocular B-scan OCT-guided 36-gauge needle

Jin H. Shen, Karen M. Joos M.D.

Proceedings Volume 9307, Ophthalmic Technologies XXV; 93070A (2015) https://doi.org/10.1117/12.2078431
Event: SPIE BiOS, 2015, San Francisco, California, United States

Abstract

Optical coherence tomography imaging is widely used in ophthalmology and optometry clinics for diagnosing retinal disorders. External microscope-mounted OCT operating room systems have imaged retinal changes immediately following surgical manipulations. However, the goal is to image critical surgical maneuvers in real time. External microscope-mounted OCT systems have some limitations with problems tracking constantly moving intraocular surgical instruments, and formation of absolute shadows by the metallic surgical instruments upon the underlying tissues of interest. An intraocular OCT-imaging probe was developed to resolve these problems. A disposable 25-gauge probe tip extended beyond the handpiece, with a 36-gauge needle welded to a disposable tip with its end extending an additional 3.5 mm. A sealed 0.35 mm diameter GRIN lens protected the fiber scanner and focused the scanning beam at a 3 to 4 mm distance. The OCT engine was a very high-resolution spectral-domain optical coherence tomography (SDOCT) system (870 nm, Bioptigen, Inc. Durham, NC) which produced 2000 A-scan lines per B-scan image at a frequency of 5 Hz with the fiber optic oscillations matched to this frequency. Real-time imaging of the needle tip as it touched infrared paper was performed. The B-scan OCT-needle was capable of real-time performance and imaging of the phantom material. In the future, the B-scan OCT-guided needle will be used to perform sub-retinal injections.

Citation Download Citation

Jin H. Shen and Karen M. Joos M.D. "Design and evaluation of an intraocular B-scan OCT-guided 36-gauge needle", Proc. SPIE 9307, Ophthalmic Technologies XXV, 93070A (12 March 2015); https://doi.org/10.1117/12.2078431

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