Observational study of Internal Limiting Membrane peeled in macular Hole surgery and studied by Transmission electronic Microscopy (TEM) and Optical Coherence Tomography (OCT) findings in closed holes.
Intraoperative pathological diagnosis such as frozen section and imprint cytology is not routinely recommended in clinical practice because of time and accuracy concerns. Full-field optical coherence tomography (FF-OCT) is a new optical imaging technique that could generate sectioning tomogram from fresh tissue and provide close-to-pathology depiction of the morphological structure and pathological changes in minutes without conventional tissue preparation, slicing, and staining, and dynamic cell imaging (DCI) added the viability information of cells/tissue, which could be more important in cancer diagnosis. This study was to evaluate the feasibility and diagnostic value of FF-OCT and DCI in breast lesions and ...
The study will assess the safety and performance of the Fantom sirolimus eluting bioresorbable vascular scaffold (BVS) in the acute setting of myocardial infarction with unstable lesions and thrombogenic milieu.This is a prospective evaluation of clinical and patient related measures in STEMI patient who undergo urgent primary percutaneous coronary intervention (PCI) with stent implantation. Patients with culprit lesions with 2.5 - 3.5 mm diameter and located in one of the main coronary arteries will be included in the trial and prospectively observed. The study will comprise 20 patients, who will undergo additional evaluation with optical coherence tomography (OCT ...
Panretinal photocoagulation reduces the risk of visual loss by 50% in patients with diabetic retinopathy. It is recognized that laser expansion into the retina may be associated with photoreceptor loss, retinal pigment epithelial hypertrophy and visual field loss. Panretinal photocoagulation can cause alteration in retinal vascular permeability therefore, retinal thickness may be increased including retinal nerve fiber layer. On the contrary, it can damage retinal cells including ganglion cells, which may decrease the retinal nerve fiber layer thickness in the latter follow up period. Peripapillary retinal nerve fiber layer can be measured by optical coherence tomography which is a non-invasive ...
To assess the changes of anterior chamber angle in patients with shallow anterior chamber and normal anterior chamber after phacoemulsification and intraocular lens implantation (IOL) using anterior segment swept-source optical coherence tomography (AS-SS-OCT).To observe the 60 eyes of 60 patients in our study.
This single-center clinical study is being conducted over the course of 2 weeks to conduct an exploratory pilot study as a preliminary evaluation of D-OCT's ability to measure skin changes from aging. Assess structural differences between young and aged skin on the face. To identify the structural characteristics of atrophic acne scars relative to normal skin on the face. To explore characteristics of cellulite relative to normal skin on the thigh in young and aged skin.
The prevalence of diabetes mellitus (DM) is increasing worldwide. Diabetic retinopathy is the most prevalent complication of DM and a leading cause of visual impairment due to closure of capillaries. High-resolution imaging techniques of the retina and its supplying vascular networks can allow novel insight to subtle changes that cannot be appreciated in standard fundus examination. In this study capillary changes of patients with different severity levels of diabetic retinopathy will be investigated with non-invasive imaging technology to better understand the process of disease progression. Imaging will be done with Optical Coherence tomography (OCT) angiography as well as spectral domain ...
Rationale: Intra-operative optical coherence tomography (iOCT) is a new technology that incorporates advanced imaging techniques in the ophthalmic operating theatre. This allows surgeons to visualize tissues in a way previously impossible We conceptualized an iOCT-guided surgical protocol for the treatment of endothelial cell dysfunction, that refrains from the current practice of over-pressurizing the eye at the end of surgery. Objective: The aim of this study is to assess the clinical value of intraoperative OCT (iOCT) for Descemet Membrane Endothelial Keratoplasty (DMEK) by comparing an iOCT-optimized surgical protocol with current practice, where the eye is over-pressurized for a set period of ...
Optical coherence tomography is a non-invasive imaging technology that provides cross-sectional images of tissues in micron-scale resolution. The angiography component of this device allows for evaluation of blood vessel and blood flow changes in the eye. The RTVue-XR device with AngioVue software will be used to detect these blood vessel and flow changes as well as protein deposits in the retinal layers. Subjects will take oral curcumin supplements to hyperfluoresce and improve detection of the amyloid proteins within the retinal layers.
ief Summary: The purpose of this study is to evaluate the nGoggle's accuracy and repeatability in detecting visual function loss. In addition, the ability to stage glaucomatous damage and investigate the relationship between nGoggle metrics and neural damage in glaucoma will also be evaluated. Longitudinal study, including 200 patients with: glaucoma, suspected of having glaucoma, nonglaucomatous optic neuropathies, AMD, retinal degenerations, other diseases involving the visual pathways, besides healthy controls. Subjects will perform standard ophthalmological exams, and the following research tests: electroencephalogram, visual evoked potentials, and questionnaires. Statistical analyses will be performed by the PI using the software Stata ...
OCT image quality is necessary to provide accurate diagnostic information to ophthalmologists. The increasing resolution of imaging techniques will require ever more high standards of optical transmission through the cornea and tear film. Given that lubricant drops can improve optical transmission through the cornea, this study will attempt to quantify this. The primary objective is to assess the effect of cross-linked sodium hyaluronate on OCT image quality compared to the effect of blinking alone.
Optical coherence tomography (OCT) is a medical diagnostic tool, providing non-invasive, non-radiative and high resolution imaging. OCT has been established since many years in ophthalmology. In dentistry the diagnostic potential of OCT is currently increasingly being noticed. This clinical study includes two individual trials: (i) Longitudinal assessment of surface sealant thickness using optical coherence tomography and (ii) comparison of crevicular fluid levels of inflammatory cytokines after the application of surface sealants.
Prospective interventional study, open, non-comparative and non-randomized. The research concerns physiological parameters of the coronary and ocular blood circulation. At the coronary level, the curves of pressure and Doppler flow will be extracted from ComboMap® (Philips). The coronary microvascular resistances, basal and hyperemic, will be determined by the average ratio of the distal pressure and flow. At the ocular level, a fundus oculi and an OCTA (angiography by tomography in optical coherence) examination will be performed. The measures of the FFR and the coronary microvascular resistance will be determined by a specific guidewire allowing simultaneous measures of pressure and Doppler ...
To place two different everolimus-eluting stents (EES), a bioabsorbable polymer EES (Synergy®) and a permanent-type polymer EES (Xience®), randomly to the ST-elevation acute myocardial infarction (AMI) and to observe and compare the early and chronic vascular responses using the frequency domain optical coherence tomography (FD-OCT). The primary endpoint is the 2-week strut coverage rate by FD-OCT.
The overall five-year goals of the project are to develop novel technology to provide actionable new information through provision of live volumetric imaging during surgery, improving surgical practice and outcomes. The investigators believe this technology will enable novel ophthalmic and other microsurgeries not possible due to current limitations in surgical visualization.
This trial studies how well ultra-high resolution optical coherence tomography works in detecting micrometer sized early stage pancreatic cancer in participants with pancreatic cancer. Ultra-high resolution optical coherence tomography may help to accurately identify pancreatic cancer in resected pancreatic specimens.
Alzheimer's disease (AD) and frontotemporal dementia (FTD) are two of the most common types of age-related neurodegenerative disorders. Identifying at-risk patients and gauging disease progression in a non-invasive manner would be invaluable. Early and correct diagnosis is crucial for coordinating supportive care, patient expectations, caregiver arrangements and family planning. In addition, as treatments become available, beginning therapy early in the disease before symptoms become severe will be important. Multimodal ocular imaging (MOI) includes an ophthalmic (eye) exam and eye photographs to evaluate different layers of the retina, which is the light sensing layer of the eye. Newer technologies make ...
PDT was hypothesized to have a primary effect on the choroidal capillaries, and a number of studies have reported choriocapillary damage and choroidal vascular remodeling after PDT. More recently, although OCTA related CSC research has been conducted, no quantitative report has thoroughly investigated the microstructural changes in the superficial, deep retinal and choroidal capillaries after hd-PDT. The purpose of the present study is to determine the changes in the retinal and choroidal capillaries quantitatively with OCTA after hd-PDT in eyes with CSC. This is a prospective observational study of patients undergoing hd-PDT for CSC with active leakage in retinal pigment ...
To explore the efficacy and pharmacodynamic effects of omiganan topical gel in facial seborrheic dermatitis.
The investigators wish to better understand the role of the choriocapillaris (CC) in the formation and progression of non-exudative in age related macular degeneration (armd) by imaging the retinal pigment epithelium (rpe) and the choroidal microvasculature and by studying their inter-dependence to determine if the loss of the CC could prove useful as an anatomic clinical trial endpoint in future drug trials.
Patients with Barrett's Esophagus (BE) undergoing endoscopic therapy through our Barrett's Esophagus Unit will be approached for study enrollment. Patients with no endoscopic evidence of BE will be considered for the study. Surveillance biopsies will be obtained per standard clinical protocol and reviewed to confirm absence of intestinal metaplasia. Patients who have achieved complete eradication of intestinal metaplasia (CRIM) will be enrolled in the study and will undergo the Nvision® Imaging System (VLE). Patients enrolled in the study will undergo clinical follow-up consisting of surveillance endoscopy every 3 months for 1 year. Surveillance endoscopy intervals may be prolonged ...
Eicosapentaenoic acid and statin therapy prevents cardiovascular events. However, the impact of these treatment in patients with in-stent neoatherosclerosis has not been clarified. So, the investigators conducted LINK IT study. This study showed that eicosapentaenoic acid(EPA) and rosuvastatin therapy improve lipid index in patients compared with rosuvastatin alone therapy. However, it was insufficient to directly evaluate the efficacy of additional effect of EPA for neoatherosclerosis. Because, statin dose of two groups was different and type of stent was variety. Therefore, the investigators designed a new prospective, randomized OCT study. The OCT operators randomly assigned 75 patients who were detected ...
Intracoronary optical coherence tomography (OCT) imaging allows for high-resolution characterization of coronary lesions. Difficulties in matching cross-sectional OCT-images with angiographic lesion localization, however, may limit its clinical utilization. The investigators sought to prospectively assess the impact of a novel system of real-time OCT-coregistration with angiography (ACR) compared to OCT alone and to the clinical standard proceeding (angiographic guided-PCI) all used for coronary lesion evaluation before percutaneous coronary interventions (PCI). The investigators hypothesize that the use of ACR will lead to less incidence of insufficient covered coronary lesions (geographical mismatch) and/or a less rate of edge dissections after PCI (combined ...
The purpose of this study is to develop a novel noninvasive bedside optical coherence tomography (OCT) imaging technique in newborn infants with HIE that improves our ability to assess the range of retinal effects from HIE and to diagnose and monitor treatments of HIE
