1. Articles in category: Dermatology

    1-24 of 502 1 2 3 4 ... 19 20 21 »
    1. VivoSightOCT Education Centre

      VivoSightOCT Education Centre

      Welcome to the VivoSight OCT Education Centre website This is an open access facility providing information about the use of Optical Coherence Tomography in Dermatology. Please feel free to browse using the navigation guides, We hope you will find the site useful. If you would like to contribute images or just give us some feedback please contact us on info@vivosightatlas.com

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    2. Recellularising of human acellular dermal matrices imaged by high-definition optical coherence tomography

      Recellularising of human acellular dermal matrices imaged by high-definition optical coherence tomography

      Background High-definition optical coherence tomography (HD-OCT) permits real-time 3-D imaging of the impact of selected agents on human skin allografts. Objective The real-time 3-D HD-OCT assessment of i) the impact on morphological and cellular characteristics of the processing of human acellular dermal matrices (HADMs) and ii) repopulation of HADMs in vitro by human fibroblasts and remodelling of the extracellular matrix by these cells. Method Four different skin decellularisation methods, Dispase II/Triton X-100, Dispase II/SDS (sodium dodecyl sulphate), NaCl/Triton X-100 and NaCl/SDS, were analyzed by HD-OCT. HD-OCT features of epidermal removal, dermo-epidermal junction (DEJ) integrity, cellularity and ...

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    3. OCT firm Michelson Diagnostics closes £2.5m 'Series B' funding

      OCT firm Michelson Diagnostics closes £2.5m 'Series B' funding

      Michelson Diagnostics , the UK-based medical device company focused on multi-beam Optical Coherence Tomography technology, has closed the £2.5m first tranche of its “Series B” financing, led by strategic investor and medical specialist Smith & Nephew alongside new investor Kent County Council as well as existing investors. The £2.5m investment will be used to expand Michelson Diagnostics’ commercial presence in Germany; launch the Company’s next generation VivoSight OCT tissue-imaging system; complete the ongoing US multi-center clinical biopsy avoidance study; and explore further applications in wound care and dentistry. VivoSight is a point-of-care tissue-imaging system that for the first time ...

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    4. A review of state-of-the-art speckle reduction techniques for optical coherence tomography fingertip scans

      A review of state-of-the-art speckle reduction techniques for optical coherence tomography fingertip scans

      Standard surface fingerprint scanners are vulnerable to counterfeiting attacks and also failure due to skin damage and distortion. Thus a high security and damage resistant means of fingerprint acquisition is needed, providing scope for new approaches and technologies. Optical Coherence Tomography (OCT) is a high resolution imaging technology that can be used to image the human fingertip and allow for the extraction of a subsurface fingerprint. Being robust toward spoofing and damage, the subsurface fingerprint is an attractive solution. However, the nature of the OCT scanning process induces speckle: a correlative and multiplicative noise. Six speckle reducing filters for the ...

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    5. Michelson Diagnostics closes £2.5 million First Tranche of £4.0 million Series B fundraising Smith & Nephew as Cornerstone Investor

      Michelson Diagnostics closes £2.5 million First Tranche of £4.0 million Series B fundraising Smith & Nephew as Cornerstone Investor

      Michelson Diagnostics, the UK based medical device company focused on multi-beam Optical Coherence Tomography (‘OCT’) technology, is pleased to announce that it has closed the £2.5 million First Tranche of its Series B financing. This was led by strategic investor, global medical technology business Smith & Nephew and included new investor Kent County Council as well as existing investors. The £2.5 million investment will be used to expand the Michelson Diagnostics’ commercial presence in Germany; launch the Company’s next generation VivoSight OCT tissue-imaging system; complete the ongoing US multi-centre clinical biopsy avoidance study and explore further applications of ...

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    6. Smith & Nephew bets on technology that 'sees through the skin'

      Smith & Nephew bets on technology that 'sees through the skin'

      Smith & Nephew has bet on a new technology that enables doctors to "see through the skin", in the hope that it could be used by the company's growing wound care business. The med tech giant has invested £1.25m in Michelson Diagnostics, a small Kent-based business which uses laser beams to produce high resolution images of cells beneath the surface of the skin. Michelson's Vivosight system is already being used in place of biopsies to diagnose non-melanoma skin cancer , a less aggressive but more common variety of the disease compared with more deadly melanoma skin cancers. But the ...

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    7. Comparative analysis of combined spectral and optical tomography methods for detection of skin and lung cancers

      Comparative analysis of combined spectral and optical tomography methods for detection of skin and lung cancers

      Malignant skin tumors of different types were studied in vivo using optical coherence tomography (OCT), backscattering (BS), and Raman spectroscopy (RS). A multimodal method is proposed for early cancer detection based on complex analysis of OCT images by their relative alteration of scattered-radiation spectral intensities between malignant and healthy tissues. An increase in average accuracy of diagnosis was observed for a variety of cancer types (9% sensitivity, 8% specificity) by a multimodal RS-BS-OCT system in comparison with any of the three methods used separately. The proposed approach equalizes the processing rates for all methods and allows for simultaneous imaging and ...

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      Mentions: Pavel Zakharov
    8. High-definition optical coherence tomography algorithm for the discrimination of actinic keratosis from normal skin and from squamous cell carcinoma

      High-definition optical coherence tomography algorithm for the discrimination of actinic keratosis from normal skin and from squamous cell carcinoma

      Background Preliminary studies described morphological features of actinic keratosis (AK) and squamous cell carcinoma (SCC) imaged by High-Definition Optical Coherence Tomography (HD-OCT) and suggested that this technique may aid in their diagnosis. However, systematic studies evaluating the accuracy of HD-OCT for the diagnosis of AK and SCC are lacking so far. Objective In this study, we sought to design an algorithm for AK classification that could (i) distinguish SCC from AK and normal skin, (ii) differentiate AK from normal skin and (iii) discriminate AKs with adnexal involvement from those without. Methods A total of 53 histopathologically confirmed lesions (37 AKs ...

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    9. Assessment of a scoring system for Basal Cell Carcinoma with multi-beam optical coherence tomography

      Assessment of a scoring system for Basal Cell Carcinoma with multi-beam optical coherence tomography

      Background Multi-beam optical coherence tomography (OCT) is a novel method of non-invasive skin imaging allowing the evaluation of tissue at high level of lateral and axial resolution. It permits the horizontal and vertical evaluation of the extent of diseases. Objective Herein, we aimed to validate diagnosing basal cell carcinoma (BCC) by OCT using a newly developed scoring system (‘Berlin Score’-BS). This was based on the predetermined criteria such as dark border underneath the tumour and ovoid structures. Their frequency and distribution in subtypes of BCC were evaluated. Methods The study was conducted in two phases, in which the experience ...

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    10. Andy Hill Appointed Chief Executive Officer of Michelson Diagnostics

      Andy Hill Appointed Chief Executive Officer of Michelson Diagnostics

      Michelson Diagnostics, the UK based medical device company focused on multi-beam Optical Coherence Tomography (‘OCT’) technology, announces the appointment of Andy Hill as Chief Executive Officer, effective from 1 February 2015. Jon Holmes will remain with the Company and take up the newly created role of Chief Technology Officer. Andy, aged 52, has substantial commercial experience in the international medical device industry with a track record of building early stage businesses with new and disruptive technologies in a wide range of clinical settings. Most recently, Andy was CEO and co-founder of Intelligent Ultrasound, a medical imaging software spinout from the ...

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    11. Identification of layers in optical coherence tomography of skin: comparative analysis of experimental and Monte Carlo simulated images

      Identification of layers in optical coherence tomography of skin: comparative analysis of experimental and Monte Carlo simulated images

      Background/purpose The goal of the study is comparative analysis of the layers in OCT images and the morphological structure of skin with thick and thin epidermis. Methods We analyzed the difference between skin with thin and thick epidermis in two ways. The first approach consisted in determination of the thicknesses of layers of skin with thin and thick epidermis of different localizations from experimental OCT images. The second approach was to develop numerical models fitting experimental OCT images based on Monte Carlo simulations revealing structure and optical parameters of layers of skin with thick and thin epidermis. Results The ...

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    12. A case report of differentiating staphylococcal scalded skin syndrome and toxic epidermal necrolysis by optical coherence tomography

      A case report of differentiating staphylococcal scalded skin syndrome and toxic epidermal necrolysis by optical coherence tomography

      Background Staphylococcal scalded skin syndrome (SSSS) and toxic epidermal necrolysis (TEN) both present with acute onset, high morbidity and significant mortality. Rapid diagnosis is therefore of importance. The aim of this study was to investigate and compare the presentation of these diseases using optical coherence tomography (OCT). Methods Two male patients with bullous diseases, SSSS and TEN, respectively, were photographed digitally, examined using dermoscopy, OCT scanned and subsequently biopsied in the said order. Results The bullous skin was visualized by OCT showing two distinct images: the SSSS-patient displayed superficial hyporefletive flaccid structures with a split high in the thickened (0 ...

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    13. Measurements of the thermal coefficient of optical attenuation at different depth regions of in vivo human skins using optical coherence tomography: a pilot study

      Measurements of the thermal coefficient of optical attenuation at different depth regions of in vivo human skins using optical coherence tomography: a pilot study

      We present detailed measurement results of optical attenuation’s thermal coefficients (referenced to the temperature of the skin surface) in different depth regions of in vivo human forearm skins using optical coherence tomography (OCT). We first design a temperature control module with an integrated optical probe to precisely control the surface temperature of a section of human skin. We propose a method of using the correlation map to identify regions in the skin having strong correlations with the surface temperature of the skin and find that the attenuation coefficient in these regions closely follows the variation of the surface temperature ...

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    14. Processing Optical Coherence Tomography Scans Of A Subject'S Skin

      Processing Optical Coherence Tomography Scans Of A Subject'S Skin

      A method of processing optical coherence tomography (OCT) scans of a subject's skin (7), the skin (7) having a surface(8), the method comprising capturing a plurality of scans through the subject's skin(7), the scans representing an OCT signal in slices through the user's skin (7) in parallel planes, the scans being offset from one another along a direction perpendicular to the parallel planes, the method comprising determining the position of the surface (8) of the skin (7) in each scan and displaying the scans to a user with an indication (9) indicative of a predetermined ...

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    15. Optical Coherence Tomography and Its Role for Delineating the Thickness of Keratinocyte Dysplasia and Neoplasia

      Optical Coherence Tomography and Its Role for Delineating the Thickness of Keratinocyte Dysplasia and Neoplasia

      Optical coherence tomography (OCT) can produce cross-sectional and en face, non-invasive, real-time images of skin. OCT produces high-resolution images at a micrometre resolution and has a maximum 2-mm penetration depth, which places OCT in the imaging gap between ultrasound and confocal microscopy. Much OCT research has been performed on keratinocyte dysplasia and neoplasia, primarily including basal cell carcinoma (BCC) and actinic keratosis. In regards to BCC and actinic keratosis, architectural disarray of the epidermis is an overall characteristic finding in OCT images. OCT can reliably differentiate between normal and lesional skin, which is of great importance when identifying tumour borders ...

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    16. Imaging of skin birefringence for human scar assessment using polarization-sensitive optical coherence tomography aided by vascular masking

      Imaging of skin birefringence for human scar assessment using polarization-sensitive optical coherence tomography aided by vascular masking

      We demonstrate the in vivo assessment of human scars by parametric imaging of birefringence using polarization-sensitive optical coherence tomography (PS-OCT). Such in vivo assessment is subject to artifacts in the detected birefringence caused by scattering from blood vessels. To reduce these artifacts, we preprocessed the PS-OCT data using a vascular masking technique. The birefringence of the remaining tissue regions was then automatically quantified. Results from the scars and contralateral or adjacent normal skin of 13 patients show a correspondence of birefringence with scar type: the ratio of birefringence of hypertrophic scars to corresponding normal skin is 2.2 ± 0.2 ...

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    17. Assessment of laser-induced acceleration effects in optical clearing of in vivo human skin by optical coherence tomography

      Assessment of laser-induced acceleration effects in optical clearing of in vivo human skin by optical coherence tomography

      Laser irradiation is considered to be a promising innovative technology which has been developed in an attempt to increase transdermal drug delivery. In this study, a near-infrared CW diode laser (785 nm) was applied to increase permeability of glycerol solutions in human skin in vivo and improve the optical clearing efficacy. Results show that for both 15%v/v and 30%v/v glycerol, the permeability coefficient increased significantly if the detected area of the skin tissue was treated with laser irradiation before optical clearing agents (OCAs) were applied. This study based on optical coherence tomography imaging technique and optical ...

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    18. Cross-evaluation of optimal glycerol concentration to enhance optical tissue clearing efficacy

      Cross-evaluation of optimal glycerol concentration to enhance optical tissue clearing efficacy

      Background/aims The efficacy of light therapeutic and diagnostic applications can be enhanced by employing optical tissue clearing (OTC) agents to minimize light scattering in tissue. This study aimed to investigate the optimal concentration of glycerol, so that it can be efficiently used as an OTC agent in dermatology. Methods Glycerol was topically applied to avoid the possibility of edema that could be caused by dermal injection. The efficacy of glycerol was quantitatively evaluated for various concentrations using optical coherence tomography (OCT) to evaluate light scattering and ultrasound imaging modality to evaluate collagen dissociation. Results The intensity in the OCT ...

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    19. Optical coherence tomography: a potential tool for prediction of treatment response for port wine stain after photodynamic therapy

      Optical coherence tomography: a potential tool for prediction of treatment response for port wine stain after photodynamic therapy

      Response of port wine stain (PWS) to photodynamic therapy treatment (PDT) is variable and depends on treatment setting used and anatomic sites as well as on size and depth of ectatic vessels. Optical coherence tomography (OCT) is a non-destructive imaging modality which can reveal the layered structure of the upper part of the skin. The structural features of the PWS skin such as the diameter and depth of the blood vessels in different anatomic sites can be showed in the OCT images. In this study, the possible role of PWS skin structure in the response to PDT is assessed. 82 ...

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    1-24 of 502 1 2 3 4 ... 19 20 21 »
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