1. Articles in category: Dermatology

    1-24 of 449 1 2 3 4 ... 17 18 19 »

    1. Optical coherence tomography applied to tests of skin care products in humans – a case study

      Explore Wiley Online Library Dermatology
      Optical coherence tomography applied to tests of skin care products in humans – a case study

      Background/purpose When evaluating skin care products for human skin, quantitative test methods need to be simple, precise and reliable. Optical coherence tomography (OCT), provides high-resolution sectional images of translucent materials to a depth of a few millimeters, a technique usually applied to medical measurements in ophthalmology and dermatology. This study aimed to demonstrate the application of OCT as the main technique for monitoring changes in skin topography during tests of a wrinkle-reduction product in humans. Methods We used a commercial OCT apparatus to perform clinical examinations of skin roughness in treated and non-treated sites in the periorbital region of ...

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    2. Real-time three-dimensional imaging of epidermal splitting and removal by high-definition optical coherence tomography

      Explore Wiley Online Library Dermatology
      Real-time three-dimensional imaging of epidermal splitting and removal by high-definition optical coherence tomography

      Background While real-time 3-D evaluation of human skin constructs is needed, only 2-D non-invasive imaging techniques are available. Objective Evaluation of the potential of High-Definition Optical Coherence Tomography (HD-OCT) for real-time 3-D assessment of the epidermal splitting and de-cellularisation. Methods Human skin samples were incubated with four different agents: Dispase II, NaCl 1M, Sodium Dodecyl Sulfate (SDS) and Triton X-100. Epidermal splitting, dermo-epidermal junction, acellularity and 3-D architecture of dermal matrices were evaluated by High-Definition Optical Coherence Tomography before and after incubation. Real-time 3-D HD-OCT assessment was compared with 2-D en face assessment by Reflectance Confocal Microscopy (RCM). (Immuno)histopathology ...

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      Mentions: University of Copenhagen Gregor B. E. Jemec

    3. Applying RGB LED in full-field optical coherence tomography for real-time full-color tissue imaging

      Explore opticsinfobase.org Dermatology
      Applying RGB LED in full-field optical coherence tomography for real-time full-color tissue imaging

      A conventional handheld skin camera is suitable for 2D inspection of shallow skin. Due to its high resolution and noninvasiveness, optical coherence tomography (OCT) has become a popular medical-imaging technology. Among OCT schemes, full-field optical coherence tomography (FF-OCT) is suitable for rapid en face imaging, as it uses a 2D imaging device for pixel processing of a sample plane. Because of its wide bandwidth and long lifetime, an RGB LED was chosen in an FF-OCT system among three source candidates in this study. A full-color tissue image and real-time video were obtained from the system to demonstrate the potential of ...

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      Mentions: National Taiwan University

    4. Michelson Diagnostics to present at Fortbildungswoche, Munich

      Explore Optical Coherence Tomography News Dermatology , Other Business News
      Michelson Diagnostics to present at Fortbildungswoche, Munich

      Michelson Diagnostics, the UK based medical device company focused on multi-beam Optical Coherence Tomography (‘OCT’) technology, today announces that leading experts in the use of optical technology in dermatology will be presenting the benefits of multi-beam OCT at the 24th Annual Education Week for Practical Dermatology and Venereology, known as Fortbildungswoche, in Munich, Germany, 19-25 July 2014. The conference session on ‘Evidence for OCT diagnostics’ will take place at 12:15-13:15, Forum 9, on Friday 25th July. The presentations include: Optical coherence tomography scientific fundamentals and applications, Dr. Martina Ulrich Optical coherence tomography for basal cell carcinoma, Prof. Dr ...

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      Mentions: Michelson Diagnostics Jon Holmes Michelson Diagnostics Vivosight

    5. Optical coherence tomography imaging of erythematotelangiectatic rosacea during treatment with brimonidine topical gel 0.33%: a potential method for treatment outcome assessment

      Explore jddonline.com Dermatology
      Optical coherence tomography imaging of erythematotelangiectatic rosacea during treatment with brimonidine topical gel 0.33%: a potential method for treatment outcome assessment

      BACKGROUND: Patients with moderate to severe rosacea often seek treatment to reduce erythema and vascular markings. Few studies have looked at the effectiveness of the novel treatment, brimonidine topical gel 0.33%, trademark name Mirvaso®, in the treatment of rosacea. We report the use of optical coherence tomography (OCT) scanning to monitor the effectiveness of Mirvaso® on in vivo skin. OCT is a non-invasive optical imaging technique that can provide high-resolution imaging of vessel and cellular morphology. OCT may be useful as a pre-treatment assessment tool for identifying possible morphologic features in the skin that may serve as outcome predictors ...

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      Mentions: Michelson Diagnostics SUNY at Stony Brook Orit Markowitz

    6. Doppler optical coherence tomography for microcirculation studies (Thesis)

      Explore British Library EThOS Dermatology , Velocimetry , Student Theses
      Doppler optical coherence tomography for microcirculation studies (Thesis)

      This thesis forms part of an ongoing long-term project to investigate the suitability of Doppler optical coherence tomography (OCT) as a measurement tool to investigate skin thickness and blood flow in patients with systemic sclerosis. There is a discussion of the characterisation of an electro-optic phase modulator for use in a Doppler OCT imaging system which is being built for the purpose of clinical studies. In addition to this the development of software for the same system is described. The work includes a comparison of two methods of obtaining Doppler information that were tested with the system; a phase resolved ...

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      Mentions: University of Manchester

    7. Noninvasive monitoring of basal cell carcinomas treated with systemic hedgehog inhibitors: Pseudocysts as a sign of tumor regression

      Explore jaad.org Dermatology
      Noninvasive monitoring of basal cell carcinomas treated with systemic hedgehog inhibitors: Pseudocysts as a sign of tumor regression

      Background Oral hedgehog inhibitors (HHIs) have shown significant efficacy in the treatment of basal cell carcinoma (BCC). The evaluation of tumor regression has been performed using clinical photography and radiographic scans. Noninvasive imaging techniques, such as reflectance confocal microscopy (RCM) and high-definition optical coherence tomography (HD-OCT), have been shown to be valuable in detecting BCC in the skin. Objective We monitored HHI-treated BCC using RCM and HD-OCT in vivo and correlated morphologic changes seen on imaging to changes in traditional histopathology. Methods Six BCCs in 5 patients receiving HHIs (vismodegib or sonidegib) were examined by RCM and HD-OCT before and ...

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      Mentions: Ludwig Maximilian University of Munich Tanja Maier

    8. Feature Of The Week 6/8/14: Automated Registration of OCT and Dermoscopy in the Assessment in Basal Cell Carcinoma

      Explore Optical Coherence Tomography News Dermatology
      Feature Of The Week 6/8/14: Automated Registration of OCT and Dermoscopy in the Assessment in Basal Cell Carcinoma

      Optical coherence tomography (OCT) has been shown to be of clinical value in imaging basal cell carcinoma (BCC). A novel dual OCT-video imaging system, providing automated registration of OCT and dermoscopy, has been developed to assess the potential of OCT in measuring the degree of sub-clinical spread of BCC. Seventeen patients selected for Mohs micrographic surgery (MMS) for BCC were recruited to the study. The extent of BCC infiltration beyond a segment of the clinically assessed pre-surgical border was evaluated using OCT. Sufficiently accurate (<0.5 mm) registration of OCT and dermoscopy images was achieved in 9 patients. The location ...

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      Mentions: Michelson Diagnostics Michelson Diagnostics Vivosight Andrew J. Coleman

    9. Sun protection and hydration of stratum corneum: a study by 2D differential method

      Explore Wiley Online Library Dermatology
      Sun protection and hydration of stratum corneum: a study by 2D differential method

      The stratum corneum (written SC in the following) is the outermost layer of the epidermis and serves as a barrier against environmental aggression, such as infection, dehydration or sun damages. Within the SC, death cells called corneocytes, linked by an intercellular bridge called desmosomes, form layers. Depending on the body part and environmental factors, the number of layers and the thickness of each one can vary.

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    10. High frequency ultrasonography but not 930nm-optical coherence tomography reliably evaluates melanoma thickness in vivo: a prospective validation study.

      Explore Wiley Online Library Dermatology
      High frequency ultrasonography but not 930nm-optical coherence tomography reliably evaluates melanoma thickness in vivo: a prospective validation study.

      Background Early diagnosis and rapid surgical excision are essential for improving the prognosis of melanoma patients. Reflectance confocal microscopy has been validated as a feasible procedure for in vivo diagnosis of melanoma but cannot be used to measure tumour thickness. However, ultrasonography and optical coherence tomography may allow melanoma thickness to be measured in vivo . Objectives Primary: To validate the accuracy and reliability of high-frequency ultrasonography and optical coherence tomography for assessing melanoma thickness in vivo . Methods We conducted a prospective study on 131 patients with at least one equivocal melanocytic lesion. Each lesion underwent optical coherence tomography and high-frequency ...

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    11. OCT Developments Address Skin

      Explore BioOptics World Dermatology , Oncology , Funding
      OCT Developments Address Skin

      Recent developments in optical coherence tomography (OCT) address skin cancer diagnosis. MedLumics (Madrid, Spain) has launched a three-year initiative to translate research into new clinical applications—with help from $4.9 million (€3.6 million) in Series A funding from EU joint investors. Called the BiopsyPen Project, the initiative is led by MedLumics and the Medical University of Vienna (Austria), along with European members including VTT Finland (Espoo, Finland), Delft University of Technology in The Netherlands, Exalos (Schlieren, Switzerland), the Polytechnic University of Madrid, and Optocap (Livingston, Scotland). The organizations are working to develop a handheld system for point-of-care diagnosis ...

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      Mentions: Michelson Diagnostics Exalos Medical University of Vienna

    12. Characterization of Optical Coherence Tomography Images Acquired at Large Distances With Large-Diameter Beams

      Explore IEEE Xplore Dermatology
      Characterization of Optical Coherence Tomography Images Acquired at Large Distances With Large-Diameter Beams

      We tested the imaging capabilities for variants of a 1550-nm swept-source fiber-based optical coherence tomography system with a telecentric system incorporated at the end of its sample arm. The system was designed for in vivo imaging of burns; therefore, we acquired images from samples located at distances greater than 24 cm from the exit of the telecentric system. Each system variation had a specific combination of diameters for the reference and sample beams. In the reference arm, we used, alternately, two collimated beams with diameters of 1.5 and 14 mm, respectively. In the sample arm, we tested collimated beams ...

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      Mentions: Michael G. Sowa National Research Council Canada Dan P. Popescu

    13. New study on non-invasive diagnosis of non-melanoma skin cancer with Melanoma Institute of Australia

      Explore Optical Coherence Tomography News Dermatology , Other Business News
      New study on non-invasive diagnosis of non-melanoma skin cancer with Melanoma Institute of Australia

      Michelson Diagnostics, the UK based medical device company focused on multi-beam Optical Coherence Tomography (‘OCT’) technology, has commenced a clinical study to investigate the use of OCT to diagnose basal cell carcinoma in collaboration with the Melanoma Institute of Australia using Michelson’s Diagnostics VivoSight system. The study, run by Dr Pascale Guitera FACD PhD, will evaluate VivoSight’s ability to triage lesions which are superficial enough to be treated non-invasively and monitor the success, or otherwise, of non-invasive therapies. The study is designed to determine the potential to change clinical practice towards more non-invasive treatments of basal cell carcinoma ...

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      Mentions: Michelson Diagnostics Jon Holmes Michelson Diagnostics Vivosight

    14. Optical coherence tomography microangiography for monitoring the response of vascular perfusion to external pressure on human skin tissue

      Explore SPIE | Journal Dermatology , Velocimetry
      Optical coherence tomography microangiography for monitoring the response of vascular perfusion to external pressure on human skin tissue

      Characterization of the relationship between external pressure and blood flow is important in the examination of pressure-induced disturbance in tissue microcirculation. Optical coherence tomography (OCT)-based microangiography is a promising imaging technique, capable of providing the noninvasive extraction of functional vessels within the skin tissue with capillary-scale resolution. Here, we present a feasibility study of OCT microangiography (OMAG) to evaluate changes in blood perfusion in response to externally applied pressure on human skin tissue in vivo . External force is loaded normal to the tissue surface at the nailfold region of a healthy human volunteer. An incremental force is applied step ...

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      Mentions: University of Washington Ruikang K. Wang Woo June Choi

    15. A complex noise reduction method for improving visualization of SD-OCT skin biomedical images

      Explore Conference Proceedings Dermatology
      A complex noise reduction method for improving visualization of SD-OCT skin biomedical images

      In this paper we consider the original method of solving noise reduction problem for visualization’s quality improvement of SD-OCT skin and tumors biomedical images. The principal advantages of OCT are high resolution and possibility of in vivo analysis. We propose a two-stage algorithm: 1) process of raw one-dimensional A-scans of SD-OCT and 2) remove a noise from the resulting B(C)-scans. The general mathematical methods of SD-OCT are unstable: if the noise of the CCD is 1.6% of the dynamic range then result distortions are already 25-40% of the dynamic range. We use at the first stage ...

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      Mentions: Pavel Zakharov

    16. Michelson Diagnostics to present at EuroMedtech 2014

      Explore Optical Coherence Tomography News Dermatology , Other Business News
      Michelson Diagnostics to present at EuroMedtech 2014

      Michelson Diagnostics, the UK based medical device company focused on multi-beam Optical Coherence Tomography (‘OCT’) technology, today announces that Chief Executive Officer, Jon Holmes, will be presenting an overview of the Company at the 6 th Annual International Medtech Partnering Conference, EuroMedtech™ 2014, in Linz, Austria, 7-8 May 2014. EuroMedtech is Europe's leading medical technology partnering conference, providing collaboration opportunities to medtech decision makers and investors. The conference provides a platform for innovative companies interested in partnering their technologies or products, initiating strategic alliances, or tapping into the international financing network. In addition, early stage projects and small entrepreneurial ...

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      Mentions: Michelson Diagnostics Jon Holmes Michelson Diagnostics Vivosight

    17. Automated registration of optical coherence tomography and dermoscopy in the assessment of sub-clinical spread in basal cell carcinoma

      Explore Informa Healthcare Dermatology
      Automated registration of optical coherence tomography and dermoscopy in the assessment of sub-clinical spread in basal cell carcinoma

      Optical coherence tomography (OCT) has been shown to be of clinical value in imaging basal cell carcinoma (BCC). A novel dual OCT-video imaging system, providing automated registration of OCT and dermoscopy, has been developed to assess the potential of OCT in measuring the degree of sub-clinical spread of BCC. Seventeen patients selected for Mohs micrographic surgery (MMS) for BCC were recruited to the study. The extent of BCC infiltration beyond a segment of the clinically assessed pre-surgical border was evaluated using OCT. Sufficiently accurate (<0.5 mm) registration of OCT and dermoscopy images was achieved in 9 patients. The location ...

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      Mentions: Kings College London Andrew J. Coleman

    18. Modern non-invasive diagnostic techniques in the detection of early cutaneous melanoma

      Explore jdcr.eu Dermatology
      Modern non-invasive diagnostic techniques in the detection of early cutaneous melanoma

      Over the past few years melanoma has grown into a disease of socio-economic importance due to the increasing incidence and persistently high mortality rates. Melanoma is a malignant tumor with a high tendency to metastasize. Therefore, an extremely important part of the therapeutic process is to identify the disease at an early stage: in situ or stage I. Many tools for early diagnosis of melanoma are available today, including dermoscopy, videodermoscopy and in vivo reflectance confocal microscopy. Other methods such as high frequency ultrasound, optical coherence tomography and electrical impedance spectroscopy may serve as additional diagnostic aids. Modern imaging techniques ...

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    19. Experimental research and observation of the skin response of mice with a second-degree scald duringirradiation by a CO 2 laser

      Explore IOPscience Dermatology
      Experimental research and observation of the skin response of mice with a second-degree scald duringirradiation by a CO 2 laser

      Second-degree scalding is a common dermatological injury. Inappropriate treatment methods in clinical practice always produce scarring, and can lead to skin cancer and other complications in the longer term. In this study optical coherence tomography (OCT) combined with a skin detector was used to monitor the response of second-degree scalded skin tissue irradiated by a CO2 laser. The process of treatment of second-degree scalding was systematically studied from the perspective of tissue optics. The OCT signal intensity was stronger within the whole recovery period in the experimental group undergoing CO2 laser treatment, and the attenuation coefficient (μt) returned ...

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      Mentions: Fujian Normal University

    20. Parallelized multi–graphics processing unit framework for high-speed Gabor-domain optical coherence microscopy

      Explore SPIE | Journal Dermatology
      Parallelized multi–graphics processing unit framework for high-speed Gabor-domain optical coherence microscopy

      Gabor-domain optical coherence microscopy (GD-OCM) is a volumetric high-resolution technique capable of acquiring three-dimensional (3-D) skin images with histological resolution. Real-time image processing is needed to enable GD-OCM imaging in a clinical setting. We present a parallelized and scalable multi-graphics processing unit (GPU) computing framework for real-time GD-OCM image processing. A parallelized control mechanism was developed to individually assign computation tasks to each of the GPUs. For each GPU, the optimal number of amplitude-scans (A-scans) to be processed in parallel was selected to maximize GPU memory usage and core throughput. We investigated five computing architectures for computational speed-up in processing ...

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      Mentions: University of Rochester Kye-Sung Lee Jannick P. Rolland

    21. MedLumics Announces “BiopsyPen Project” with €3.6M EU in Funding; Initiative Aimed at New Clinical Applications for Optical Coherence Tomography

      Explore Optical Coherence Tomography News Dermatology , Funding
      MedLumics Announces “BiopsyPen Project” with €3.6M EU in Funding; Initiative Aimed at New Clinical Applications for Optical Coherence Tomography

      MedLumics , a medical imaging company specializing in advanced optical coherence tomography (OCT) technology, today announced the kick off of a three-year initiative to translate the latest OCT research into new clinical applications. Called the “BiopsyPen Project,” the effort is led by MedLumics and the Medical University of Vienna, with participation from a consortium of European members including VTT Finland, Delft University of Technology, Exalos AG, the Polytechnic University of Madrid, and Optocap Ltd. Together, the organizations are working to develop the second generation of a compact handheld diagnostic imaging system that will radically transform the capability of biophotonic technologies for ...

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      Mentions: Wolfgang Drexler Exalos Medical University of Vienna

    22. Spectroscopic study on appearances of make-up skins using a visible RGB-LED OCT

      Explore Wiley Online Library Dermatology
      Spectroscopic study on appearances of make-up skins using a visible RGB-LED OCT

      Background/purpose Facial foundation is very effective to correct color irregularities of the skin surface and to protect the skin from harmful light. This depends strongly on both the optical properties and the coating condition of foundation on the skin surface. Methods We constructed the full-field optical coherence tomography (OCT) (FF-OCT) microscope with visible light sources of RGB LEDs. The commercially available skin replicas were used as the model of skin in the experiment, which were composed of two layers, a thin polyurethane film transcribed from cheek surface of a female and a beige-colored silicone substrate. The foundations were applied ...

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    23. Positive top line results from clinical trial for diagnosis of basal cell carcinoma using VivoSight OCT

      Explore Optical Coherence Tomography News Dermatology , Other Business News
      Positive top line results from clinical trial for diagnosis of basal cell carcinoma using VivoSight OCT

      Michelson Diagnostics, the UK based medical device company focused on multi-beam Optical Coherence Tomography (‘OCT’) technology, announces positive top line results from the successfully completed multi-centre, prospective clinical trial for the diagnosis of basal cell carcinoma using VivoSight OCT. In the study, over 250 patients with clinically suspicious lesions for basal cell carcinoma were scanned at six centres in Germany. In each case, diagnosis using VivoSight OCT was compared with standard clinical diagnosis with and without dermoscopy. All results were verified by the gold standard of biopsy and histological analysis. Papers by Professor Dr. med. Julia Welzel, Dr. med. Martina ...

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      Mentions: Michelson Diagnostics Jon Holmes Gordon Mckenzie

    24. Positive results from multi-centre, prospective clinical trial for diagnosis of basal cell carcinoma using Michelson Diagnostics’ VivoSight OCT Presented at AAD

      Explore Optical Coherence Tomography News Dermatology
      Positive results from multi-centre, prospective clinical trial for diagnosis of basal cell carcinoma using Michelson Diagnostics’ VivoSight OCT Presented at AAD

      Michelson Diagnostics, the UK based medical device company focused on multi-beam Optical Coherence Tomography (‘OCT’) technology, today announces positive results from the successfully completed multi-centre, prospective clinical trial for the diagnosis of basal cell carcinoma using VivoSight OCT to be presented at the upcoming American Academy of Dermatology’s 72nd Annual Meeting (AAD) in Denver, Colorado, 21-25 March 2014. Papers by Professor Dr. med. Julia Welzel, Dr. med. Martina Ulrich discussing results from the clinical study will be presented in the AAD Conference Session F153 “Non-Invasive Imaging in Dermatology” on Tuesday, 25 March at 1.00pm. The presented results support ...

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      Mentions: Michelson Diagnostics Michelson Diagnostics Vivosight Daniel M. Siegel
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