Parabolic BM-scan technique for full range Doppler spectral domain optical coherence tomography

Jaillon, Franck; Makita, Shuichi; Yabusaki, Masaki; Yasuno, Yoshiaki

doi:10.1364/oe.18.001358

Cited by 20 publications

(11 citation statements)

References 28 publications

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“…The axial motion of the particles due to magnetic modulation can degrade the full-range reconstruction. 17 In our experiments, we applied the sinusoidal modulation along the slow axis for the MM signal and linear-phase modulation along the fast axis for the full-range operation. 18,19 Similar utilization of the orthogonal scan axes has been used for combining full-range operation with optical microangiography.…”

Section: Full-range Volumetric Mm-octmentioning

confidence: 99%

Volumetric full-range magnetomotive optical coherence tomography

et al. 2014

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Abstract. Magnetomotive optical coherence tomography (MM-OCT) can be utilized to spatially localize the presence of magnetic particles within tissues or organs. These magnetic particle-containing regions are detected by using the capability of OCT to measure small-scale displacements induced by the activation of an external electromagnet coil typically driven by a harmonic excitation signal. The constraints imposed by the scanning schemes employed and tissue viscoelastic properties limit the speed at which conventional MM-OCT data can be acquired. Realizing that electromagnet coils can be designed to exert MM force on relatively large tissue volumes (comparable or larger than typical OCT imaging fields of view), we show that an order-of-magnitude improvement in three-dimensional (3-D) MM-OCT imaging speed can be achieved by rapid acquisition of a volumetric scan during the activation of the coil. Furthermore, we show volumetric (3-D) MM-OCT imaging over a large imaging depth range by combining this volumetric scan scheme with full-range OCT. Results with tissue equivalent phantoms and a biological tissue are shown to demonstrate this technique.

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Section: Full-range Volumetric Mm-octmentioning

confidence: 99%

Volumetric full-range magnetomotive optical coherence tomography

et al. 2014

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“…However, the nonlinear spatial extension of the light degrades the suppression ratio of the complex-conjugate artifact. There is still a BM-scanning method for full-range complex Fourier domain OCT. 16,17 For those methods, the phase modulation of a reference beam (M-scan) and transversal scanning (B-scan) are simultaneously performed. It requires only a single A-scan for each single transversal position to obtain a full-range FD-OCT image.…”

Section: Introductionmentioning

confidence: 99%

Sine-modulated wavelength-independent full-range complex spectral optical coherence tomography with an ultra-broadband light source

Zhang

Zhong

2015

Advances in Mechanical Engineering

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We present a full-range complex spectral domain optical coherence tomography with an ultra-broadband light source based on sinusoidal modulation. For the sinusoidal modulation strategy, a lead zirconate titanate stack actuator is employed to achieve the sinusoidal vibration of a mirror and therefore to get a series of spectral interferogram with different phase delays. The purpose of this strategy is to get higher performance complex-conjugate artifact elimination. Bessel separation of the signal sequence at each wavelength of the spectrometer was used to reconstruct the real and imaginary components of interference fringes; however, the sinusoidal modulation method is independent of light source wavelength. The experimental results demonstrated that the method had an excellent performance in a complex-conjugate suppression of 50 dB for a full width at half maximum bandwidth of 236 nm, and it has better anti-artifact ability and more flexible range in phase shifting than the conventional wavelength-dependent phase-shifting method on a full-range complex spectral optical coherence tomography system. Furthermore, the effect of the hysteresis error of lead zirconate titanate actuators on the performance of complex-conjugate artifact elimination was investigated and the solution of lead zirconate titanate positioning performance for both conventional phase-shifting and sine-modulation methods was suggested

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“…Both artifacts produce error patterns in OCT images and may lead to inaccurate diagnoses in biomedical applications. Several approaches to solving the mirror image artifact have already been proposed [7,8]. More recently, solving the problem of saturation artifact has gained more interest.…”

Section: Introductionmentioning

confidence: 99%

A pseudo-spectrum reconstruction method for reducing saturation artifact in spectral-domain optical coherence tomography

Lee

Tsai

2014

Biophotonics: Photonic Solutions for Better Health Care IV

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Saturation artifact is a significant image noise due to the limited detectable maximum light intensity of the CCD camera in the spectrometer module of spectral-domain optical coherence tomography (SD-OCT). This effect makes the OCT image appear with saturation noise in certain areas along with even more obvious vertical lines of noise. The unwanted artifacts cover the real sample structure information and can render the image unclear. This artifact problem is significant when using highly focused objective lenses for improving image transverse resolution. In this study, we developed a parabolic-based reconstruction method to estimate the saturated parts of the measured spectra in order to obtain the corresponding pseudo spectra. The saturation artifact is clearly reduced when the OCT images are processed from the pseudo spectra.

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Parabolic BM-scan technique for full range Doppler spectral domain optical coherence tomography

Cited by 20 publications

References 28 publications

Volumetric full-range magnetomotive optical coherence tomography

Volumetric full-range magnetomotive optical coherence tomography

Sine-modulated wavelength-independent full-range complex spectral optical coherence tomography with an ultra-broadband light source

A pseudo-spectrum reconstruction method for reducing saturation artifact in spectral-domain optical coherence tomography

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