1. Articles in category: Clinical Trials

    1-24 of 440 1 2 3 4 ... 17 18 19 »
    1. Pulmonary Optical Coherence Tomography in COVID-19 Patients

      Pulmonary Optical Coherence Tomography in COVID-19 Patients

      To evaluate by intravascular OCT study the presence of microvascular pulmonary thrombosis in patients with COVID-19, high D-dimer levels and contrast CT scan negative for pulmonary thrombosis. We'll also evaluate the extension of microvascular pulmonary thrombosis in patients with contrast CT scan positive for pulmonary embolism in areas where contrast CT scan was negative.

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      Mentions: Cordis
    2. The Application of Non-invasive and Cellular Level Resolution Fullfield Optical Coherence Tomography: Establishment and Analysis of Subcutaneous Cellular Level Image Database of Anatomical Locations in Healthy Volunteers and Evaluation of Usability

      The Application of Non-invasive and Cellular Level Resolution Fullfield Optical Coherence Tomography: Establishment and Analysis of Subcutaneous Cellular Level Image Database of Anatomical Locations in Healthy Volunteers and Evaluation of Usability

      The OCT can provide cellular resolution (~1μm in lateral and axial directions) images. A cellular resolution OCT has the characteristics of non-invasive, non-radioactive, labelfree, real-time and high tissue penetration depth that are highly valuable for clinical use. This technology allows visualization of important structural features such as the epidermis and dermis and the epidermal-dermal junction. OCT has the advantage of generating cross-sectional images, like the orientation of pathology slides. The ApolloVue® S100 Image System is intended to be used as a non-invasive imaging tool in the evaluation of external human skin tissue microstructure by providing two-dimensional, crosssectional (B-scan) and ...

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    3. Does OCT Optimise Results of Stenting on the Left Main Stem

      Does OCT Optimise Results of Stenting on the Left Main Stem

      Angiographic evaluation of lesions of the left main stem presents particular challenges and high procedural complexity. The clinical sequelae of a suboptimal result in this context may be severe, and thus, it is recommended that patients with left-main lesions be considered for imaging-guided interventions by means of optimal coherence tomography (OCT) in non-ostial left main lesions. The investigators have previously demonstrated in a randomized trial of patients undergoing PCI for a lesion responsible for non ST elevation acute coronary syndromes that OCT provides useful clinical information beyond that obtained by angiography alone, and OCT-guidance for angioplasty in these patients yielded ...

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    4. a/LCI-OCT Pilot in Esophagus

      a/LCI-OCT Pilot in Esophagus

      This study will test a newly developed dual modality probe, including optical coherence tomography (OCT) and angle-resolved low-coherence interferometry (a/LCI), in the human esophagus to determine 1) whether adequate tissue contact can be attained by the probe to acquire high quality images, and 2) to identify if these images can discern whether the imaged tissue is squamous or Barrett's Esophagus (BE) epithelium. This pilot study will test the operating characteristics of the probe and collect data for further optimization of the a/LCI-OCT device.

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    5. OCT Evaluation of Early Vascular Repair in Patients With Non ST Elevation Acute Coronary Syndrome (NSTE-ACS)

      OCT Evaluation of Early Vascular Repair in Patients With Non ST Elevation Acute Coronary Syndrome (NSTE-ACS)

      This is a prospective study of a new generation of drug-eluting stent in the treatment of non ST elevation acute coronary syndrome (NSTE-ACS). The purpose of this study was to evaluate the extent of early vascular repair in NSTE-ACS patients after receiving the new generation of drug-eluting stents, and the value of OCT guided optimal implantation in further improving the target vascular endothelial repair, so as to provide the basis for early discontinuation of dual antiplatelet drugs (dapt) in NSTE-ACS patients and later large-scale randomized clinical research.This study is a prospective, multicenter, randomized controlled clinical study. Sixty patients with ...

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    6. Insights From the Retina on Cerebral Microvascular Dysfunction in Haemorrhagic Stroke. A Prospective Observational Study

      Insights From the Retina on Cerebral Microvascular Dysfunction in Haemorrhagic Stroke. A Prospective Observational Study

      Fundoscopy, optical coherence tomography (OCT) and OCT-angiography (OCTA) are established examinations and bear minimal risks. The recognition of retinal microvascular signs will enhance the pathophysiological understanding of the vasculopathy in patients with intracerebral haemorrhage (ICH) and aneurysmatic subarachnoid hemorrhage (aSAH) and might serve as prognostic and diagnostic indicators.

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    7. Observing the Morphology of Schlemm's Canal and Crystalline Lens in Different Age

      Observing the Morphology of Schlemm's Canal and Crystalline Lens in Different Age

      The aim of this study is to quantify and observe the morphology of trabecular meshwork (TM), Schlemm's canal (SC), ciliary body and crystalline lens before and after cycloplegia in patients with different ages using swept-source optical coherence tomography .

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    8. Effects of External Testosteron Intake on the Choroid: Enhance-depth Imaging Optical Coherence Tomography Study

      Effects of External Testosteron Intake on the Choroid: Enhance-depth Imaging Optical Coherence Tomography Study

      According to the results Ciloğlu et al., CSC is related to elevated total testosterone levels. Testosterone may play a role in predisposing males to CSC. Thus, we aimed to investigate the possible effect of external testosteron intake over choroidal parameters; such as choroidal thickness, choroidal vascularity index, choroidal stromal ve luminal areas,ect.

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    9. Skin Imaging to Inform Laser Treatments

      Skin Imaging to Inform Laser Treatments

      The purpose of this study is to obtain information (such as lesion depth, depth of the most superficial part of the lesion, and the size and density of blood vessels) with the assistance of an imaging device, and use this information to assist in selection of laser settings for the treatment of skin conditions. The imaging modality is called Optical Coherence Tomography (OCT). Multiple laser modalities will be used, including intense pulsed light (BroadBand Light, Profractional Sciton), pulsed dye laser (Vbeam Perfecta, Candela), long-pulse 755nm (GentleLASE, Candela), Sciton long-pulse 1064nm lasers, and non-ablative and ablative fractional resurfacing (Profractional, Sciton) lasers ...

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      Mentions: UC Irvine
    10. Comparison Between Two SS-OCT Biometry

      Comparison Between Two SS-OCT Biometry

      Since recently a second swept-source optical coherence tomography (ss-OCT) optical biometry device was launched (Anterion, Heidelberg Engineering). Aim of this study is a retrospective data collection of patients who were measured with both ss-OCT optical biometry devices and to assess the limits of agreement of the two devices. Retrospective comparison of two ss-OCT biometry devices concerning comparability of measurements of axial eye length, anterior chamber depth, lens thickness and keratometry

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    11. Optical Coherence Tomography Angiography Evaluation of Ocular Changes in Patients With Carotid Artery Stenosis

      Optical Coherence Tomography Angiography Evaluation of Ocular Changes in Patients With Carotid Artery Stenosis

      A growing body of research indicates that abnormal ocular microvascular features may serve as a novel biomarker reflecting the severity of underlying cardiovascular, neurodegenerative, and microvascular disease. Since blood flow to the retina is predominantly supplied by the internal carotid artery (ICA), we hypothesized that ocular microvasculature and structure changes may reflect the disease status or therapeutic effects in patients with carotid artery stenosis. Optical coherence tomography angiography (OCTA) is a novel, non-invasive imaging modality that can be a reliable tool for the qualitative and quantitative assessments of ocular vessels during various ocular pathological or physiological changes. Recent studies have ...

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    12. OCT Guided Punctal Stenosis Management

      OCT Guided Punctal Stenosis Management

      The study was conducted on 40 eyes of 24 patients have acquired inflammatory punctal stenosis and 20 eyes of 10 patients of normal asymptomatic subjects as control group. We studied the external punctal diameter, visibility of the internal punctum and punctal depth before treatment using AS-OCT, and then patients were re-evaluated after one month of treatment with preservative free methylprednisolone 5% eye drops.

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    13. Skin Pathology Assessment With Optical Technologies

      Skin Pathology Assessment With Optical Technologies

      The Skin Pathology assessment with Optical Technologies (SPOT) study aims to assess the feasibility of recently developed light-based skin imaging tools such as Optical Coherence Tomography (OCT) for the study of eczema (dermatitis [AD]). Tools such as OCT have enabled us to see beneath the skin surface, allowing us to see changes in our skin which are hidden and impossible to assess by eye, simply by shining harmless light into the skin. The investigators want to understand what these changes represent in the broader context of eczema. To do this, the investigators would like to recruit 60 volunteers who have ...

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    14. SD-OCT Measurement of the Human Retina in Pregnancy With Pre-existing or De Novo Hypertension and Without Hypertension

      SD-OCT Measurement of the Human Retina in Pregnancy With Pre-existing or De Novo Hypertension and Without Hypertension

      The complications of long-standing severe and acute severe elevations in systemic blood pressure (hypertension) may involve large vessels as well as smaller vessels, these latter comprising what is known as the microcirculation. Diseases of the microcirculation include stroke, dementia, and end stage renal disease to name a few. The microcirculation of the brain (and kidneys) possess a reflex called autoregulation that protects the downstream organ from fluctuations in blood pressure and blood flow. The neurosensory retina of the eye is a forward extension of brain and has a similar microcirculation to that of brain, including the presence of blood retinal ...

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    15. Capsule Endomicroscopy for Visualization of the Small Intestine in EED Population in Pakistan

      Capsule Endomicroscopy for Visualization of the Small Intestine in EED Population in Pakistan

      The laboratory has developed a minimally invasive screening method known as tethered capsule endomicroscopy (TCE) for imaging intestinal mucosa. With TCE, an unsedated subject swallows a tethered pill, which captures microscopic images of the entire esophagus, stomach, and small intestine, as it is naturally transits these organs via peristalsis and under the influence of gravity. The capsule implements a microscopic imaging technology called optical coherence tomography (OCT) that obtains 10-µm-resolution cross-sectional images of tissue. The procedure is brief, well tolerated, and can be much less expensive than endoscopy. The Investigators have implemented TCE for imaging the upper gastrointestinal tract ...

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    16. D-OCT of Facial Telangiectasia Treated With IPL

      D-OCT of Facial Telangiectasia Treated With IPL

      Objectives: To examine whether dynamic Optical Coherence Tomography (OCT) could characterize vessel dimensions and blood flow of telangiectasias before and after treatment with Intense Pulsed Light (IPL). Methods: Dynamic-OCT (D-OCT) imaged telangiectasia characterized blood vessel width and depth, blood flow, and attenuation. Measurements were done immediately before and after, 1-3 days after, and 1 month after IPL treatment. Characterization of vessel dimensions at baseline were verified by a blinded observer. At one-month follow-up, clinical improvement was characterized as good, moderate or none and possible adverse effects were described.

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    17. Morphological Parameters of In-stent RESTenosis Assessed and Identified by OCT

      Morphological Parameters of In-stent RESTenosis Assessed and Identified by OCT

      The statistical risk of intrastent stenosis has fallen considerably with the emergence of latest generation coated stents (drug-eluting stents: DES). The number and clinical lifespan of stents implanted over the last twenty-five years, however, explain the fact that restenosis remains a not unusual clinical problem which is expressed as a recurrence of angina or of an acute coronary syndrome (ACS). The mechanisms involved in this restenosis are multifactorial in nature and differ depending on the type of stent and the time since the restenosis occurred. In symptomatic stent restenosis (angina or acute coronary syndrome), a further angioplasty is usually required ...

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      Mentions: Abbot
    18. Repeatability in Measurements of Two ssOCT and One OLCR Biometer

      Repeatability in Measurements of Two ssOCT and One OLCR Biometer

      Achieving high accuracy and precision in ocular biometry has become primordial for cataract surgery, due to the shift of cataract surgery from a rehabilitation procedure to a refractive one. Aim of this study is to determine the repeatability of ocular biometric parameters obtained using three biometry devices, two ss-OCT biometers and an OLCR device.

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    19. Changes in Optical Coherence Tomography Leakage Mapping in Diabetic Macular Edema After Conbercept Treatment

      Changes in Optical Coherence Tomography Leakage Mapping in Diabetic Macular Edema After Conbercept Treatment

      Eyes with diabetic macular edema requiring conbercept treatment will be followed up for one month. Before treatment, one week after treatment and one month after treatment, the eyes will be examined by optical coherence tomography (OCT) and optical coherence tomographic angiography (OCTA). The changes of macular edema will be observed and analyzed by OCT leakage mapping software, and the relationship between the changes of macular edema and visual acuity will be analyzed.

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    20. Optical Coherence Tomography - Guided Protocol for Left Main Percutaneous Coronary Intervention

      Optical Coherence Tomography - Guided Protocol for Left Main Percutaneous Coronary Intervention

      The LEMON study (LEft Main Oct-guided iNterventions) is a prospective, multicentre, open-label, interventional , non-randomized trial that investigates the feasibility and efficiency of OCT guidance for left main PCI in 10 active French interventional cardiology centres. The aim of the study is the appliance of a pre-defined standardized protocol for LM PCI . The LM PCI strategy is guided by 3 OCT runs, according to a pre-determined protocol. The first OCT run (run1) is performed before any stent implantation, the second run (run2) is performed after the stent is implanted, POT (proximal optimization technique) is applied and side branch iss rewired through ...

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    1-24 of 440 1 2 3 4 ... 17 18 19 »
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