scholarly journals The Detection of Internal Fingerprint Image Using Optical Coherence Tomography

2017 ◽  
Vol 22 (4) ◽  
pp. 59-72 ◽  
Author(s):  
Joanna Sekulska-Nalewajko ◽  
Jarosław Gocławski ◽  
Dominik Sankowski
Keyword(s):  
Optical Coherence Tomography ◽  
Cross Sections ◽  
High Intensity ◽  
Three Dimensional ◽  
Skin Surface ◽  
Image Space ◽  
Optical Coherence ◽  
Fingerprint Image ◽  
Volumetric Images

Abstract Recently, optical coherence tomography (OCT) has been tested as a contactless technique helpful for damaged or spoofed fingerprint recovery. Three dimensional OCT images cover the range from the skin surface to papillary region in upper dermis. The proposed method extracts from cross-sections of volumetric images (B-scans) high intensity ridges in both air-epidermis and dermis-epidermis interfaces. The extraction is based on the localisation of two OCT signal peaks corresponding to these edges. The borders are spline smoothed in two orthogonal planes of the image space. The result images are presented and compared with camera views.

Intraluminal three-dimensional optical coherence tomography – a tool for imaging of the Eustachian tube?

2019 ◽  
Vol 133 (2) ◽  
pp. 87-94 ◽  
Author(s):  
R Schuon ◽  
B Mrevlje ◽  
B Vollmar ◽  
T Lenarz ◽  
G Paasche
Keyword(s):  
Optical Coherence Tomography ◽  
Eustachian Tube ◽  
Cross Sections ◽  
Ex Vivo ◽  
Three Dimensional ◽  
Diagnostic Value ◽  
Optical Coherence ◽  
Experimental Conditions ◽  
Non Invasive ◽  
Tube Dysfunction

AbstractObjectivesThe cause of Eustachian tube dysfunction often remains unclear. Therefore, this study aimed to examine the feasibility and possible diagnostic use of optical coherence tomography in the Eustachian tube ex vivo.MethodsTwo female blackface sheep cadaver heads were examined bilaterally. Three conditions of the Eustachian tube were investigated: closed (resting position), actively opened and stented. The findings were compared (and correlated) with segmented histological cross-sections.ResultsIntraluminal placement of the Eustachian tube with the optical coherence tomography catheter was performed without difficulty. Regarding the limited infiltration depth of optical coherence tomography, tissues can be differentiated. The localisation of the stent was accurate as was the lumen.ConclusionThe application of optical coherence tomography in the Eustachian tube under these experimental conditions is considered to be a feasible, rapid and non-invasive diagnostic method, with possible diagnostic value for determining the luminal shape and superficial lining tissue of the Eustachian tube.

scholarly journals Comparison of Intensity- and Polarization-based Contrast in Amyloid-beta Plaques as Observed by Optical Coherence Tomography

2019 ◽  
Vol 9 (10) ◽  
pp. 2100 ◽  
Author(s):  
Johanna Gesperger ◽  
Antonia Lichtenegger ◽  
Thomas Roetzer ◽  
Marco Augustin ◽  
Danielle J. Harper ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Amyloid Beta ◽  
Cross Sections ◽  
Imaging Modality ◽  
Three Dimensional ◽  
Brain Regions ◽  
Optical Coherence ◽  
Amyloid Beta Protein ◽  
Tissue Sections ◽  
Cortical Regions

One key hallmark of Alzheimer’s disease (AD) is the accumulation of extracellular amyloid-beta protein in cortical regions of the brain. For a definitive diagnosis of AD, post-mortem histological analysis, including sectioning and staining of different brain regions, is required. Here, we present optical coherence tomography (OCT) as a tissue-preserving imaging modality for the visualization of amyloid-beta plaques and compare their contrast in intensity- and polarization-sensitive (PS) OCT. Human brain samples of eleven patients diagnosed with AD were imaged. Three-dimensional PS-OCT datasets were acquired and plaques were manually segmented in 500 intensity and retardation cross-sections per patient using the freely available ITK-SNAP software. The image contrast of plaques was quantified. Histological staining of tissue sections from the same specimens was performed to compare OCT findings against the gold standard. Furthermore, the distribution of plaques was evaluated for intensity-based OCT, PS-OCT and the corresponding histological amyloid-beta staining. Only 5% of plaques were visible in both intensity and retardation segmentations, suggesting that different types of plaques may be visualized by the two OCT contrast channels. Our results indicate that multicontrast OCT imaging might be a promising approach for a tissue-preserving visualization of amyloid-beta plaques in AD.

scholarly journals Non-invasive three-dimensional thickness analysis of oral epithelium based on optical coherence tomography—development and diagnostic performance

Heliyon ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. e06645
Author(s):  
Charlotte Theresa Trebing ◽  
Sinan Sen ◽  
Stefan Rues ◽  
Christopher Herpel ◽  
Maria Schöllhorn ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Diagnostic Performance ◽  
Three Dimensional ◽  
Oral Epithelium ◽  
Optical Coherence ◽  
Non Invasive

scholarly journals Three-dimensional segmentation and depth-encoded visualization of choroidal vasculature using swept-source optical coherence tomography

2021 ◽  
pp. 153537022110285
Author(s):  
Hao Zhou ◽  
Tommaso Bacci ◽  
K Bailey Freund ◽  
Ruikang K Wang
Keyword(s):  
Optical Coherence Tomography ◽  
Three Dimensional ◽  
Age Related Macular Degeneration ◽  
Optical Coherence ◽  
Full Thickness ◽  
Swept Source ◽  
Automated Method ◽  
Choroidal Imaging ◽  
Choroidal Vasculature ◽  
Choroidal Vessels

The choroid provides nutritional support for the retinal pigment epithelium and photoreceptors. Choroidal dysfunction plays a major role in several of the most important causes of vision loss including age-related macular degeneration, myopic degeneration, and pachychoroid diseases such as central serous chorioretinopathy and polypoidal choroidal vasculopathy. We describe an imaging technique using depth-resolved swept-source optical coherence tomography (SS-OCT) that provides full-thickness three-dimensional (3D) visualization of choroidal anatomy including topographical features of individual vessels. Enrolled subjects with different clinical manifestations within the pachychoroid disease spectrum underwent 15 mm × 9 mm volume scans centered on the fovea. A fully automated method segmented the choroidal vessels using their hyporeflective lumens. Binarized choroidal vessels were rendered in a 3D viewer as a vascular network within a choroidal slab. The network of choroidal vessels was color depth-encoded with a reference to the Bruch’s membrane segmentation. Topographical features of the choroidal vasculature were characterized and compared with choroidal imaging obtained with indocyanine green angiography (ICGA) from the same subject. The en face SS-OCT projections of the larger choroid vessels closely resembled to that obtained with ICGA, with the automated SS-OCT approach proving additional depth-encoded 3D information. In 16 eyes with pachychoroid disease, the SS-OCT approach added clinically relevant structural details, including choroidal thickness and vessel depth, which the ICGA studies could not provide. Our technique appears to advance the in vivo visualization of the full-thickness choroid, successfully reveals the topographical features of choroidal vasculature, and shows potential for further quantitative analysis when compared with other choroidal imaging techniques. This improved visualization of choroidal vasculature and its 3D structure should provide an insight into choroid-related disease mechanisms as well as their responses to treatment.

Three-dimensional computational analysis of optical coherence tomography images for the detection of soft tissue sarcomas

2013 ◽  
Vol 19 (2) ◽  
pp. 021102 ◽  
Author(s):  
Shang Wang ◽  
Chih-Hao Liu ◽  
Valery P. Zakharov ◽  
Alexander J. Lazar ◽  
Raphael E. Pollock ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Soft Tissue ◽  
Computational Analysis ◽  
Three Dimensional ◽  
Soft Tissue Sarcomas ◽  
Optical Coherence

scholarly journals Visualizing dynamics of angiogenic sprouting from a three-dimensional microvasculature model using stage-top optical coherence tomography

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Haruko Takahashi ◽  
Keisuke Kato ◽  
Kenji Ueyama ◽  
Masayoshi Kobayashi ◽  
Gunwoong Baik ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Three Dimensional ◽  
Optical Coherence

Three-dimensional ophthalmic optical coherence tomography with a refraction correction algorithm

2003 ◽  
Author(s):  
Robert J. Zawadzki ◽  
Christoph Leisser ◽  
Rainer Leitgeb ◽  
Michael Pircher ◽  
Adolf F. Fercher
Keyword(s):  
Optical Coherence Tomography ◽  
Three Dimensional ◽  
Optical Coherence ◽  
Correction Algorithm

Tu1963 Contrast Enhancement for Three-Dimensional Optical Coherence Tomography Images for Improved Delineation of Subsurface Structures

2013 ◽  
Vol 144 (5) ◽  
pp. S-892
Author(s):  
Osman O. Ahsen ◽  
Michael G. Giacomelli ◽  
Tsung-Han Tsai ◽  
Yuankai K. Tao ◽  
Hsiang-Chieh Lee ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Contrast Enhancement ◽  
Three Dimensional ◽  
Optical Coherence ◽  
Subsurface Structures

scholarly journals Three-dimensional speckle suppression in optical coherence tomography based on the curvelet transform

2010 ◽  
Vol 18 (2) ◽  
pp. 1024 ◽  
Author(s):  
Zhongping Jian ◽  
Lingfeng Yu ◽  
Bin Rao ◽  
Bruce J. Tromberg ◽  
Zhongping Chen
Keyword(s):  
Optical Coherence Tomography ◽  
Three Dimensional ◽  
Curvelet Transform ◽  
Optical Coherence ◽  
Speckle Suppression
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