Spectral domain optical coherence tomography of multi-MHz A-scan rates at 1310 nm
range and real-time 4D-display up to 41 volumes/second |
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| Authors: | Dong-hak Choi Hideaki Hiro-Oka Kimiya Shimizu Kohji Ohbayashi |
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| Institution: | 1Center for Natural Science, Kitasato University, Kitasato 1-15-1, Minamiku, Sagamihara, Kanagawa, 252-0373, Japan;2Department of Ophthalmology, Kitasato University, Kitasato1-15-1, Minamiku, Sagamihara, Kanagawa, 252-0374, Japan;3Graduate School of Medical Sciences, Kitasato University, Kitasato1-15-1, Minamiku, Sagamihara, Kanagawa, 252-0373, Japan |
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| Abstract: | An ultrafast frequency domain optical coherence tomography system was developed at A-scan rates
between 2.5 and 10 MHz, a B-scan rate of 4 or 8 kHz, and volume-rates between 12 and 41
volumes/second. In the case of the worst duty ratio of 10%, the averaged A-scan rate was 1 MHz. Two
optical demultiplexers at a center wavelength of 1310 nm were used for linear-k
spectral dispersion and simultaneous differential signal detection at 320 wavelengths. The
depth-range, sensitivity, sensitivity roll-off by 6 dB, and axial resolution were 4 mm, 97 dB, 6 mm,
and 23 μm, respectively. Using FPGAs for FFT and a GPU for volume rendering, a real-time 4D
display was demonstrated at a rate up to 41 volumes/second for an image size of 256 (axial) ×
128 × 128 (lateral) voxels.OCIS codes: (100.6890) Three-dimensional image processing, (110.4500) Optical coherence tomography, (170.4500) Optical coherence tomography |
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