A. Martinez Jimenez, R. Cernat, A. Bradu, R. Riha, E. A. Proano Grijalva, B. O. Meyer, T. Ansbaek, K. Yvind, A. Podoleanu
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引用次数: 0
Abstract
This paper explores the challenges of signal processing when using optical coherence tomography (OCT) imaging instruments driven by asymmetric MHz bidirectional sweeping lasers. A downconversion master–slave (DMS) method is proposed as a viable alternative to the traditional OCT protocol. Unlike conventional swept source OCT, which requires a separate calibration for each sweep, the DMS approach does not require calibration of the acquired channeled spectra; its operation is independent of the tuning direction. We demonstrate the practicality of the DMS method with en‐face OCT images obtained with an OCT instrument equipped with a fast bidirectional swept laser (tuning speed 1.6 MHz) and a slow acquisition card of only 2.5 MS/s sampling rate.
本文探讨了使用非对称 MHz 双向扫描激光器驱动的光学相干断层扫描（OCT）成像仪器时信号处理所面临的挑战。本文提出了一种下转换主从（DMS）方法，作为传统 OCT 协议的可行替代方案。传统的扫描光源 OCT 需要对每次扫描进行单独校准，而 DMS 方法则不同，它不需要对获取的通道光谱进行校准；其操作与调谐方向无关。我们用配备了快速双向扫频激光器（调谐速度为 1.6 MHz）和采样率仅为 2.5 MS/s 的慢速采集卡的 OCT 仪器获得的面内 OCT 图像证明了 DMS 方法的实用性。
期刊介绍：
The first international journal dedicated to publishing reviews and original articles from this exciting field, the Journal of Biophotonics covers the broad range of research on interactions between light and biological material. The journal offers a platform where the physicist communicates with the biologist and where the clinical practitioner learns about the latest tools for the diagnosis of diseases. As such, the journal is highly interdisciplinary, publishing cutting edge research in the fields of life sciences, medicine, physics, chemistry, and engineering. The coverage extends from fundamental research to specific developments, while also including the latest applications.
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