1. Articles in category: Clinical Trials

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    1. 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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    2. 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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    3. 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
    4. 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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    5. 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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    6. 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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    7. 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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    8. 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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    9. 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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    10. 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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    11. 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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    12. Qvanteq Bioactive Coronary Stent System First in Man (FIM) Clinical Investigation

      Qvanteq Bioactive Coronary Stent System First in Man (FIM) Clinical Investigation

      Objective of this First in Man study is to assess feasibility and safety of Qvanteq's bioactive coronary stent for treatment of stable coronary artery disease patients with de novo coronary artery stenosis in native vessels. The proprietary surface of Qvanteq's bioactive coronary stent improves the in-growth behavior of the stent in the treated vessel. In-vivo animal studies revealed fast in-growth (similar to BMS), which however is not resulting in excessive tissue overgrowth as observed in BMS but rather has an efficacy profile similar to drug-eluting stent (DES), meaning suppression of tissue overgrowth. This should reduce the risk of ...

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    13. Does optical coherence tomography optimize results of stenting? Rationale and study design.

      Does optical coherence tomography optimize results of stenting? Rationale and study design.

      Background To date, no randomized study has investigated the value of optical coherence tomography (OCT) in optimizing the results of coronary angioplasty for non-ST elevation acute coronary syndromes (NSTE-ACS). Methods DOCTORS is a randomized, prospective, multicentre, open-label clinical trial to evaluate the utility of OCT to optimize results of angioplasty of a lesion responsible for NSTE-ACS. Patients (n = 250) will be randomized to undergo OCT-guided angioplasty (use of OCT to optimise procedural result, including change to strategy with the possibility of additional interventions); or angioplasty under fluoroscopy alone. The primary endpoint is the functional result of the angioplasty procedure as ...

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    14. OCT in Rare Chorioretinal Diseases

      OCT in Rare Chorioretinal Diseases

      This study will evaluate the total blood flow in the retina and choroid (structures in the back of the eye) by Doppler optical coherence tomography (OCT) and OCT angiography. Angiography is mapping of the blood vessels. The purpose of measuring blood flow in the retina and choroid is to 1.) determine if rare diseases in these structures causes a change in blood flow compared to healthy eyes and 2.) find out if areas of changed blood flow line up with areas of damage that appear on conventional testing.

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    15. Optical Coherence Tomography (OCT) in Hypertension & Chronic Kidney Disease (CKD)

      Optical Coherence Tomography (OCT) in Hypertension & Chronic Kidney Disease (CKD)

      Patients with high blood pressure (hypertension) and chronic kidney disease are at an increased risk of developing heart disease and strokes. Part of this risk is due to changes in the structure and function of the blood vessels throughout the body. It is thought that reducing high blood pressure and treating chronic kidney disease improves the structure and function of blood vessels but information on this is limited. Optical coherence tomography (OCT) is a method of looking at the blood vessels at the back of the eye. It is a simple, quick and non-invasive test that you may have previously ...

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    16. Fractional flow reserve or optical coherence tomography guidance to revascularize intermediate coronary stenosis using angioplasty (FORZA) trial: study protocol for a randomized controlled trial

      Fractional flow reserve or optical coherence tomography guidance to revascularize intermediate coronary stenosis using angioplasty (FORZA) trial: study protocol for a randomized controlled trial

      Background The management of patients with angiographically intermediate coronary lesions is a major clinical issue. Fractional flow reserve provides validated functional insights while optical coherence tomography provides high resolution anatomic imaging. Both techniques may be applied to guide management in case of angiographically intermediate coronary lesions. Moreover, these techniques may be used to optimize the result of percutaneous coronary intervention. We aim to compare the clinical and economic impact of fractional flow reserve versus optical coherence tomography guidance in patients with angiographically intermediate coronary lesions. Methods Patients with at least one angiographically intermediate coronary lesion will be randomized (ratio 1 ...

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    17. Optical Coherence Tomography in Staging Patients With Upper Tract Urothelial Cancer

      Optical Coherence Tomography in Staging Patients With Upper Tract Urothelial Cancer

      This clinical trial studies how well optical coherence tomography works in staging patients with upper-tract urothelial carcinomas. Staging describes the severity of a person's cancer based on the size and/or extent (reach) of the original (primary) tumor and whether or not cancer has spread in the body. It also helps the doctor plan the appropriate treatment. Optical coherence tomography is a procedure that uses infrared light waves to give three-dimensional pictures of structures inside tissues and organs. The pictures are made by a computer linked to the light source. Optical coherence tomography may be effective in staging patients ...

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    1-24 of 219 1 2 3 4 5 6 7 8 9 10 »
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