Ultrahigh-Speed Spectral-Domain Optical Coherence Tomography up to 1-MHz A-Scan Rate Using Space–Time-Division Multiplexing
| Autor: | Daewoon Seong, Kibeom Park, Ruchire Eranga Wijesinghe, Euimin Lee, Jeehyun Kim, Deokmin Jeon, Mansik Jeon, Hyeree Kim |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Pixel medicine.diagnostic_test Spectrometer business.industry 020208 electrical & electronic engineering 02 engineering and technology Dead time Multiplexing Interferometry Optics Parallel processing (DSP implementation) Optical coherence tomography 0202 electrical engineering electronic engineering information engineering medicine Electrical and Electronic Engineering Adaptive optics business Instrumentation |
| Zdroj: | IEEE Transactions on Instrumentation and Measurement. 70:1-8 |
| ISSN: | 1557-9662 0018-9456 |
| DOI: | 10.1109/tim.2021.3073701 |
| Popis: | The primary optimization of the imaging speed of optical coherence tomography (OCT) has been keenly studied. In order to overcome the major speed limitation of spectral-domain OCT (SD-OCT), we developed an ultrahigh-speed SD-OCT system, with an A-scan rate of up to 1 MHz, using the method of space–time-division multiplexing (STDM). Multicameras comprising a single spectrometer were implemented in the developed ultrahigh-speed STDM method to eliminate the dead time of operation, whereas STDM was simultaneously employed to enable wide-range scanning measurements at a high speed. By successfully integrating the developed STDM method with GPU parallel processing, 8 vol/s for an image range of $250\times 250\times2048$ pixels ( $9\times 4.5\times 5$ mm) was achieved, with an adjustable volume rate according to the required scanning speed and range. The examined STDM-OCT results of the customized optical thin film confirmed its feasibility for various fields that require rapid and wide-field scanning. |
| Databáze: | OpenAIRE |
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