2014
DOI: 10.1364/ao.53.004164
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Motion artifact and background noise suppression on optical microangiography frames using a naïve Bayes mask

Abstract: Optical coherence tomography (OCT) is a technique that allows for the three-dimensional imaging of small volumes of tissue (a few millimeters) with high resolution (~10μm). Optical microangiography (OMAG) is a method of processing OCT data, which allows for the extraction of the tissue vasculature with capillary resolution from the OCT images. Cross-sectional B-frame OMAG images present the location of the patent blood vessels; however, the signal-to-noise-ratio (SNR) of these images can be affected by several… Show more

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Cited by 15 publications
(12 citation statements)
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References 21 publications
(26 reference statements)
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“…The high resolution images of the cortex were taken through the open skull cranial window [14], using the spectral domain OCT system [20] with a superluminescent diode (Thorlabs Inc.) as the light source, which has a central wavelength of 1340 nm with a bandwidth of 110 nm, providing a ~7 μm axial resolution in the air. In the sample arm, 10X scan lens (Thorlabs Inc.) was used to achieve ~7 μm lateral resolution.…”
Section: Resultsmentioning
confidence: 99%
“…The high resolution images of the cortex were taken through the open skull cranial window [14], using the spectral domain OCT system [20] with a superluminescent diode (Thorlabs Inc.) as the light source, which has a central wavelength of 1340 nm with a bandwidth of 110 nm, providing a ~7 μm axial resolution in the air. In the sample arm, 10X scan lens (Thorlabs Inc.) was used to achieve ~7 μm lateral resolution.…”
Section: Resultsmentioning
confidence: 99%
“…Streaks due to motion artifacts (Fig. 2) may affect subsequent vessel segmentation procedures and quantification of morphology [64], so minimizing artifact signal while preserving vessel contrast in the image is desired. In this work, we developed an approach to minimizing these artifacts in the resulting vascular maps which consisted of identifying frames with bulk motion using an average B-scan variance threshold.…”
Section: Discussionmentioning
confidence: 99%
“…After the motion artifact frames were replaced with the average of the nearest motion-free frames, the depth projections were largely free of high intensity bands corresponding to motion. Other post-processing techniques for reducing motion artifacts include frequency rejection filters [65] and segmentation of vessels in B-scans with a classifier algorithm [64]. The former is effective for periodic motion artifacts but may be less so for removal of bulk motion that is non-periodic [64,65].…”
Section: Discussionmentioning
confidence: 99%
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