1. Articles in category: Clinical Trials

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    1. OCT Imaging of Papilledema in Pediatric Idiopathic Intracranial Hypertension

      OCT Imaging of Papilledema in Pediatric Idiopathic Intracranial Hypertension

      Longitudinal clinical observation of optic nerve head, using slit lamp fundoscopy, guides therapy in pediatric idiopathic intracranial hypertension (IIH) patients; however, it remains a limited method of producing quantitative data in evaluating in patients with IIH. In this study we intend to compare, by using spectral domain optical coherence tomography (OCT), the mean retinal nerve fiber layer thickness and total retinal thickness (RNFLT/TRT) of the optic nerve of newly diagnosed IIH children to a control group. This will provide a quantitative measure for follow-up and treatment of this patient group.

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    2. SD-OCT Angiography

      SD-OCT Angiography

      The objective of this study is to image retinal vascular alterations in patients with retinal disease using the AngioVue OCT-A system and understand the information these images provide. The investigators will image study participants who have retinal diseases with the AngioVue unit (Optovue) and will collect relevant clinical data to understand the nature of the information contained in images obtained on AngioVue. This study being conducted under an abbreviated IDE. The investigators will analyze data using descriptive statistics. Risks related to light exposure will be managed by ensuring that the exposure to the AngioVue light source is well below maximum ...

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    3. Coronary Artery and Systemic Autoimmune Disease: Diagnostics and Treatment

      Coronary Artery and Systemic Autoimmune Disease: Diagnostics and Treatment

      This study evaluates in vivo intracoronary imaging using intravascular ultrasound and optical coherence tomography and safety and efficacy of new generation fully bioresorbable vascular scaffolds in four well defined systemic autoimmune (rheumatoid arthritis, mixed connective tissue disease, systemic sclerosis, systemic lupus erythematosus) and concomitant coronary disease patients.

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    4. Assessment of Cardiac Allograft Vasculopathy by Optical Coherence Tomography

      Assessment of Cardiac Allograft Vasculopathy by Optical Coherence Tomography

      Cardiac allograft vasculopathy (CAV) is characterized by marked intimal proliferation and concentric vascular thickening and fibrosis. CAV remains the leading cause of late morbidity and mortality in heart transplant recipients. Optical coherence tomography (OCT) is a new generation catheter-based modality that acquires images at a spatial resolution of 10-20 μm which is 10-fold greater than that of intravascular ultrasound (IVUS). OCT is currently the most sensitive imaging technique for early CAV detection. Recent studies proved that circulating human leukocyte antigen (HLA) directed donor-specific antibodies correlate with increased mortality and CAV. Contradiction of scientific results has been reported regarding increased resting ...

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    5. Interest of Medical Imaging in the Diagnostic Strategy Vis a Vis a Suspected Horton Disease

      Interest of Medical Imaging in the Diagnostic Strategy Vis a Vis a Suspected Horton Disease

      The study aims at measuring the sensitivity and specificity of a series of imaging signs (recorded by magnetic resonance angiography, vascular tomodensitometry, vascular ultrasonography, retina angiography and retina optic coherence tomography) for the diagnosis of Horton disease, the gold standard being the result of temporal artery biopsy.

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    6. Comparison of Strut Coverage With OPTIMAX Versus SYNERGY Stents

      Comparison of Strut Coverage With OPTIMAX Versus SYNERGY Stents

      The purpose of this study is to compare vascular healing of the stented segment after deployment of titanium-nitride-oxide coated cobalt-chromium OPTIMAX™ bio-active stent (BAS) and SYNERGY™ everolimus-eluting stent (EES) in patients with acute coronary syndromes requiring percutaneous coronary intervention. Patients treated with BAS will be treated with DAPT for at least 4 weeks after the procedure followed by aspirin alone, while patients in the EES group will be treated with DAPT, at least for 6 months post procedure. In addition, this study will collect initial information about the safety and effectiveness of the BAS in comparison with EES group at ...

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    7. Measurement of the Distance Between the Limbus and Insertion of Extraocular Muscles Using Anterior Segment Optical Coherence Tomography

      Measurement of the Distance Between the Limbus and Insertion of Extraocular Muscles Using Anterior Segment Optical Coherence Tomography

      Study designed to determine the ability and accuracy of anterior segment optical coherence tomography (AS-OCT) to measure the distance between the corneoscleral limbus and the insertion site of the extraocular muscles (EOM) in adults with and without previous strabismus surgery. And to compare in surgical patients the pre-operative AS-OCT limbal-muscle insertion distance measurement to the intraoperative limbal-muscle insertion measurement using calipers (gold standard).

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    8. Vision Outcomes Using Quantitative Optical Coherence Tomography Evaluation in Age Related Macular Degeneration

      Vision Outcomes Using Quantitative Optical Coherence Tomography Evaluation in Age Related Macular Degeneration

      The investigators have developed an image analysis method that can predict the likelihood that a patient with age related macular degeneration (AMD) will progress within 1 year, based on computerized analysis of optical coherence tomography (OCT) images that are routinely acquired in clinical practice on each patient visit to the ophthalmologist. The investigators' goal is to evaluate whether this method will improve the ability to detect AMD earlier and improve visual outcomes in AMD patients by assigning patient risk categories and having patients come back for follow up based on those categories.

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    9. Lateral Rectus Muscle and Anterior Segment Optical Coherence Tomography (AS-OCT)

      Lateral Rectus Muscle and Anterior Segment Optical Coherence Tomography (AS-OCT)

      Background and study aims : The investigators conducted this study to evaluate the movement of extraocular muscle after strabismus surgery with non-invasive tool called AS-OCT. Who can participate? patients who underwent typical lateral rectus recession surgery for correcting intermittent exotropia What does the study involve? Volunteers will attend a clinic for four visits over six months. They will undergo AS-OCT at every visits during follow up period. AS-OCT is non-invasive test to evaluate operation site. The test only requires their cooperation when they undergo AS-OCT. What are the possible benefits and risks of participating? This is non-invasive test for your postoperative ...

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      Mentions: Samsung
    10. Single-centre, Registry Trial, the Patients Presented With Stable Coronary Artery Disease

      Single-centre, Registry Trial, the Patients Presented With Stable Coronary Artery Disease

      This is a prospective study to analyze the outcome of provisional main vessel stenting on side branch by utilizing Two-Dimensional (2D) and Three-Dimensional (3D) frequency domain optical coherence tomography (FD-OCT). To analyze the fate of side-branch after provisional main vessel stenting based on morphology defined prior to PCI by OCT. Offline analysis of side branch impingement of the ostium of SB leading to acute loss in SB diameter area, carina shift and plaque shift will be also be performed.

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    11. 3D Single Cell Analysis Using Cell Morphology and Organelle Scattering Texture

      3D Single Cell Analysis Using Cell Morphology and Organelle Scattering Texture

      Achieved formalin-fixed paraffin embedded tissue specimens from colon cancers and/or other benign and pre-cancer colon lesions as well as melanoma and/or other benign pigmented skin lesions will be used. The achieved specimens were kept in Department of Pathology, National Taiwan University Hospital. Sections of achieved pathological specimens were put on glass slides and tissue image will be observed by 3D optical coherence tomography (OCT). The 3D optic tomography system utilize a Ce:YAG optical fiber as light source and also combined with confocal microscopy. Taken together, these features made the 3D optic tomography system have very high resolution ...

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    12. Assessment of Coronary Plaque Composition Using Optical Coherence Tomography

      Assessment of Coronary Plaque Composition Using Optical Coherence Tomography

      The investigators hypothesis is that local activation of the endogenous Lp-PLA2 plays an integral role in early atherosclerosis, and contributes to the mechanism of coronary endothelial dysfunction and to the structural and mechanical properties that characterize plaque vulnerability. Thus, the investigators study will characterize prospectively the correlation between the functional and structural vascular wall properties, and the activity of the Lp-PLA2 pathway.

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    13. Computed Optical Margin Assessment for Breast Cancer Surgery, Phase I (Part B)

      Computed Optical Margin Assessment for Breast Cancer Surgery, Phase I (Part B)

      This intraoperative study is a prospective study analyzing specimens from fifty subjects. Patients scheduled to undergo breast- conserving surgery will be recruited in accordance with the inclusion and exclusion criteria. The study period per subject is the time it takes to assess the ex vivo breast tissue sample using the study device. Image review will be conducted during surgery and compared to the margin status findings in the post-operative pathology report.

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    14. Vascular Healing After Deployment of Titanium-nitride-oxide-coated OPTIMAX™ Stent and PROMUS-ELEMENT™ Everolimus-Eluting Stent

      Vascular Healing After Deployment of Titanium-nitride-oxide-coated OPTIMAX™ Stent and PROMUS-ELEMENT™ Everolimus-Eluting Stent

      The purpose of this study is to compare vascular healing of the stented segment after deployment of titanium-nitride-oxide coated cobalt-chromium Optimax™-stent stent and Promus-Element™ everolimus-eluting stent in patients with acute coronary syndromes requiring percutaneous coronary intervention. Comparison of OCT and CFR findings of titanium-nitride-oxide coated cobalt-chromium Optimax™-stent and Promus-Element™ everolimus-eluting stent at two months after the index procedure. Comparison of intravascular coronary flow reserve measurement to non-invasive transthoracic echocardiography-derived coronary flow reserve measurement. Comparison of epicardial vasodilation to coronary microcirculatory vasodilation

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    15. Optical Coherence Tomography Guided Percutaneous Coronary Intervention With Stent Implantation

      Optical Coherence Tomography Guided Percutaneous Coronary Intervention With Stent Implantation

      Coronary artery disease is one of the most prevalent diseases in the western countries. A waxy substance called plaque can build up inside the coronary arteries. Over time, plaque can harden or rupture, and cause narrowing (stenosis) of the arteries and reduce the flow of oxygen-rich blood to the heart. The standard treatment of symptomatic coronary stenosis is percutaneous coronary intervention (PCI) with balloon dilation followed by stent implantation. A stent is a small metallic grid that stabilizes the coronary vessel wall after the balloon dilation. Currently, drug-eluting stents (DES) are the most widely used stent types. DESs consist of ...

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    16. OCT Angiography in Wet AMD

      OCT Angiography in Wet AMD

      The primary goals of this study are to use optical coherence tomography (OCT) angiography (blood vessel mapping) to: diagnose the presence of new blood vessels in wet age-related macular degeneration (AMD) evaluate patients undergoing treatment for wet AMD determine if reduced flow to the choroid is a risk factor for developing wet AMD.

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    17. Preoperative Progression of Macular Holes

      Preoperative Progression of Macular Holes

      Knowledge of the natural history and progression of macular holes is mainly limited to the studies from the pre- optical coherence tomography era. By observing macular holes preoperatively we are able to determine the extent of the preoperative macular hole progression. At our institution macular holes are treated in an elective setting. The majority of macular holes undergo a 2-step sequence of phacoemulsification and intraocular lens implantation followed by vitrectomy. We wish to observe the effect of time and cataract surgery on the progression of macular holes prior to vitrectomy.

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    1-24 of 227 1 2 3 4 5 6 7 8 9 10 »
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