1. Articles in category: Clinical Trials

    1-24 of 285 1 2 3 4 ... 10 11 12 »
    1. OCT in Diagnosis of Irregular Corneas

      OCT in Diagnosis of Irregular Corneas

      This main goal of this study is to improve the detection, classification, monitoring, and treatment of irregular corneas due to keratoconus, warpage, dry eye, scar, stromal dystrophies, and other corneal conditions. The primary goal will be achieved by using optical coherence tomography (OCT) to: Develop an OCT-based system to classify and evaluate corneal-shape irregularities. Develop OCT metrics for more sensitive detection of keratoconus progression. Develop OCT-and-topography guided phototherapeutic keratectomy (PTK) for irregular corneas.

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    2. SOLEMN Study - Synergy Optical Coherence Tomography in Left Main PCI (SOLEMN)

      SOLEMN Study - Synergy Optical Coherence Tomography in Left Main PCI (SOLEMN)

      Percutaneous coronary intervention (PCI) is increasingly used to treat unprotected left main coronary artery stenosis. Protected LM PCI is considered standard of care in most centers. OCT allows for precise determination of stent placement, stent expansion and apposition. The pattern of vessel healing can be very precisely studied if immediate post-stent implantation OCT/IVUS data is compared to the 6-month post-PCI interval. While OCT cannot be optimally used for ostial lesion imaging, IVUS can be used to image ostial lesions/stent placement. Optimal and consistent vessel healing is particularly important in LM PCI where stent thrombosis is a potential complication ...

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    3. Optical Coherence Tomography in Cerebral Amyloidosis

      Optical Coherence Tomography in Cerebral Amyloidosis

      In this observational study, the investigators aim to evaluate whether changes in the retinal and choroidal circulation, as assessed by Optical Coherence Tomography (OCT) and the quantification of retinal amyloid deposits using auto-fluorescence and hyperspectral retinal imaging, are correlated with the degree and subtype of dementia and with the presence or absence of a positive amyloid scan. For this purpose, patients with established Alzheimer's Disease (AD) and Lewy Body Dementia (LBD), as well as amyloid positive and amyloid negative Mild Cognitive Impairment (MCI) and aged matched cognitively intact patients will be included in this cross-sectional study.

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    4. Ultrahigh-resolution Optical Coherence Tomography Imaging of the Anterior Eye Segment Structures

      Ultrahigh-resolution Optical Coherence Tomography Imaging of the Anterior Eye Segment Structures

      The development of optical coherence tomography (OCT) and its application for in vivo imaging has opened entirely new opportunities in ophthalmology (Wojtkowski, Kaluzny et al. 2012; Drexler, Liu et al. 2014). The technology allows for both noninvasive visualization of the morphology and measurement of functional parameters within ocular tissues to a depth of a few millimetres even in nontransparent media. Until now the resolution of commercially available OCT systems is, however, much lower than that provided by light microscopy. Recently, an ultrahigh-resolution OCT system was developed by our group providing resolutions of 1.7 and 17 µm in axial and ...

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    5. Vitreo-papillary Traction as an Entity Identified by Optical Coherence Tomography (OCT)

      Vitreo-papillary Traction as an Entity Identified by Optical Coherence Tomography (OCT)

      In ophthalmology vitreo-macular adhesion, vitreo-macular traction and posterior vitreous detachment were recognized entities for a long time. On the other hand vitreo-papillary adhesion/ traction is a fairly new concept in ophthalmology that became known after the use of OCT in ophthalmology imaging. Reasons, effects and ways of treatment of vitreo-papillary traction will take some time to evolve. The case study in which this traction was documented was initiated by an observation of a persistent, tiny single retinal hemorrhage above the optic disc of an eye. The patient was completely asymptomatic because of the vitreo-papillary traction but the OCT documentation of ...

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    6. Optical Coherence Tomography Angiography (OCT-A) in Children (≥ 6 <14 Years of Age) (OCTAC)

      Optical Coherence Tomography Angiography (OCT-A) in Children (≥ 6 <14 Years of Age) (OCTAC)

      Optical coherence tomography angiography (OCTA) is a new non-invasive imaging technique that employs motion contrast imaging to high-resolution volumetric blood flow information. OCTA compares the decorrelation signal between sequential OCT b-scans taken at precisely the same cross-section in order to construct a map of blood flow. At present, level 1 evidence of the technology's clinical applications doesn't exist. The investigators plan to compare OCTA as an imaging modality to conventional imaging modalities used in clinical routine.

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    7. Optical Coherence Tomography Versus Intravascular Ultrasound Guided Percutaneous Coronary Intervention (OCTIVUS)

      Optical Coherence Tomography Versus Intravascular Ultrasound Guided Percutaneous Coronary Intervention (OCTIVUS)

      This study is to establish the primary hypothesis that Optical coherence tomography-guided Percutaneous coronary intervention(OCT-guided PCi) is superior to Intravascular ultrasound guided Percutaneous coronary intervention(IVUS-guided PCI) regarding the target vessel failure at 1 year.

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    8. Optical Coherence Tomography Angiography Examinations in Chronic Retinal Artery Occlusion (RAO-OCTA)

      Optical Coherence Tomography Angiography Examinations in Chronic Retinal Artery Occlusion (RAO-OCTA)

      Occlusion of the retinal arteries is an emergency which causes sudden, painless unilateral vision loss. Loss of blood flow causes ischemic damage to the retina. The extent of damage depends on the area affected. Following the acute phase of the disease re-canalization occurs and lesser blood flow can be detected usually without functional recovery. Purpose of the study is to examine the retinal blood flow in chronic cases of retinal artery occlusion. Standard procedures to examine this disease include retinoscopy following pupil dilation, fluorescein angiography and more recently, optical coherence tomography (OCT). The latest direction in OCT development was OCT ...

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    9. OPtical Frequency Domain Imaging Versus INtravascular Ultrasound in Percutaneous Coronary InterventiON - OPINION Imaging

      OPtical Frequency Domain Imaging Versus INtravascular Ultrasound in Percutaneous Coronary InterventiON - OPINION Imaging

      This study is the sub-study of OPINION Trial. (UMIN000010580) The aim of this study is to evaluate how Optical frequency domain imaging (OFDI) or Intravascular Ultrasound (IVUS) imaging technology influence to the Percutaneous Coronary Intervention (PCI) strategy. Optical frequency domain imaging (OFDI) is a novel, high resolution intravascular imaging modality. Intravascular ultrasound (IVUS) is a widely used conventional imaging modality for achieving optimal stent deployment. This study is the sub-study of OPINION Trial. (UMIN000010580) The aim of this study is to evaluate how OFDI or IVUS imaging technology influence to the Percutaneous Coronary Intervention (PCI) strategy. We will enroll the ...

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    10. Integrated Coronary Imaging Registry

      Integrated Coronary Imaging Registry

      The coronary images of selective angiography and optical coherence tomography with FFR(Fractional Flow Reserve) values of the intermediate lesions (50-70% stenosis) will be prospectively registered. The coronary images of selective angiography and optical coherence tomography with FFR(Fractional Flow Reserve) values of the intermediate lesions (50-70% stenosis) will be prospectively registered. The patients with intermediate lesions after CT angiography and invasive coronary angiography will be screened, and optical coherence tomography, FFR and selective CT angiography will be performed. The coronary images and FFR values will be registered, and the patients will be followed-up up to 2 years to investigate ...

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    11. Simultaneous OCT and B-FAF in Eyes With Alteration of the Foveal Contour

      Simultaneous OCT and B-FAF in Eyes With Alteration of the Foveal Contour

      Some alterations of the foveal contour do not meet the criteria established for the definition of lamellar macular hole on the basis of optical coherence tomography (OCT). However, these alterations may show an appearance, on blue fundus autofluorescence (B-FAF) imaging, reminiscent of lamellar macular hole. The aim of the study is to evaluate in detail these alterations recording simultaneously OCT and B-FAF.

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    12. Polarization Sensitive Optical Coherence Tomography (PS-OCT) for Retinal Imaging

      Polarization Sensitive Optical Coherence Tomography (PS-OCT) for Retinal Imaging

      The aim of this pilot study is to assess the ability of a new polarization sensitive optical coherence tomography system to obtain high-quality images of retinal birefringence. Glaucoma is the second leading cause of blindness in the world. The current clinical standard-of-care procedure to diagnose glaucoma is visual field testing with disc photography. Visual field testing is subjective both in the patient's feedback and the physician's interpretation of this feedback, and disc photography requires a physician's subjective interpretation. As a result, it is estimated that current methods can diagnose glaucoma only after 40% of the nerve fiber ...

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    13. OCT in Borderline Coronary Artery Lesions (OCT-borderline)

      OCT in Borderline Coronary Artery Lesions (OCT-borderline)

      To find out the safety and efficacy of Optical Coherence Tomography (OCT) in the evaluation and treatment of angiographically borderline coronary artery lesions in a Chinese population, and to compare the effectiveness of OCT versus SPECT in treating such subjects. All patients included in the study will be those that are found to have borderline coronary artery lesions on coronary angiography, in whom we feel that OCT will be useful to assess whether PCI will be of benefit to the treatment of the lesion pathology, or whether optimal medical therapy is the most appropriate treatment modality. Those patients who declined ...

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    14. Optical Coherence Tomography in Acute Coronary Syndrome (OPTICO-ACS)

      Optical Coherence Tomography in Acute Coronary Syndrome (OPTICO-ACS)

      The OPTICO-ACS- study program - combining for the first time in vivo characterization of the ACS-causing "culprit lesion" by intracoronary imaging technique with optical coherence tomography (OCT) and molecular analysis of immune-cells derived from the culprit coronary thrombus and biochemical analyses in patients with acute-coronary-syndrome (ACS).

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    15. Pituitary Gland Enlargement Was First Diagnosed by Optical Coherence Tomography (OCT)

      Pituitary Gland Enlargement Was First Diagnosed by Optical Coherence Tomography (OCT)

      OCT is now an established way to measure the thickness of the Retinal Nerve Fiber Layer (RNFL) in the retina of the eye. The thickness of the RNFL is always a reflection of the number of the RNFs in any particular area of the retina. Each single RNF runs a long course starting from the cell body which is the retinal ganglion cell in the retina and ends in the thalamus of the brain where it relays visual information to other nerve cell in the thalamus. Along this long course RNFs are in close anatomical relationship with the pituitary gland ...

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    16. Comparisons of Morphological Measurement Between Coronary Computed Tomography and Optical Coherence Tomography

      Comparisons of Morphological Measurement Between Coronary Computed Tomography and Optical Coherence Tomography

      The objective of this study is to evaluate the precision of semi-automated lumen boundary identification from coronary computed tomography angiography (cCTA) by current version of HeartFlow software and the impact on fractional flow reserve (FFRCT) by using optical coherence tomography (OCT) as reference standard.

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    17. Optical Coherence Tomography Morphologic and Fractional Flow Reserve Assessment in Diabetes Mellitus Patients (COMBINE)

      Optical Coherence Tomography Morphologic and Fractional Flow Reserve Assessment in Diabetes Mellitus Patients (COMBINE)

      Combined Optical Coherence Tomography Morphologic and Fractional Flow Reserve Hemodynamic Assessment of Non-Culprit Lesions to Better Predict Adverse Event Outcomes in Diabetes Mellitus Patients COMBINE (OCT-FFR) Prospective Register To study the natural evolution of patients with at least one intermediate angiographic but non-hemodynamic significant stenotic lesion, in two subgroups of patients, with TCFA vs. no TCFA as detected by OCT imaging and to compare these two groups of patients with each other as well as to a subset of patients with FFR-positive and PCI-treated intermediate lesions on future MACE.

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    1-24 of 285 1 2 3 4 ... 10 11 12 »
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