Skin cancer incidence rises worldwide due to high sun exposure and ageing. Basal cell carcinoma (BCC) is the most prevalent form, with a lifetime risk of 16-20% in the Netherlands. Currently, the gold standard for diagnosing and subtyping basal cell carcinoma (BCC) is a punch biopsy. Since this technique is invasive, new non-invasive diagnostic methods have been developed, including optical coherence tomography (OCT). In patients with clinical and dermoscopic suspicion of BCC, OCT makes it possible to confirm and subtype BCC with high confidence, thereby obviating the need for a punch biopsy in a substantial part of patients. Hence, BCC ...

Histology studies have shown that many disorders of the retina and choroid such as age-related macular degeneration is associated with a build up abnormal deposits, in the retina or subretinal space. Being able to detect subtle changes in retina and choroidal structure is crucial for better understanding and monitoring of this potentially blinding condition. This study aims to commercially available Spectralis® OCT-system with a central wavelength of 880nm explore the ability of a confocal scanning laser ophthalmoscope (cSLO) for OCT imaging utilising a modified by the addition of a longer wavelength OCT (1075nm , a wavelength deployed on other commercially available ...

The study aims to explore the reversibility of airway remodeling by Endobronchial Optical Coherence Tomography (EB-OCT). In this study, EB-OCT is used to assess the treatment effect of Tiotropium in early stage of COPD. Investigators recruit COPD patients in Grade A and Grade C according to GOLD 2019. Patients in Grade A will begin to use Tiotropium once daily, and EB-OCT, pulmonary function test and chest CT will be performed in baseline, 6 months, 1 year and 2 year. Patients in Grade C will begin to use LABA+LAMA (including but not limited to Olodaterol / Tiotropium) or LAMA (Tiotropium) , same ...

In the MEDIMACS project, we will use a randomized clinical-trial design to address the effects of mediterranean diet on atherosclerotic plaque vulnerability and coronary endothelial function in order to decipher complex interplays between diet, microbiome, immunological and metabolic responses and coronary atherosclerosis. We will focus on patients after an episode of acute coronary syndrome and use state-of-the-art techniques to address atherosclerotic plaque composition and coronary endothelial function. A number of different -omic approaches will be used to address effector pathways. The insights provided by this study will allow identifying potential new dietary, microbiota and/or metabolic targets for the treatment ...

The content of this research project is to identify the angiofibrotic switch, the transition from angiogenesis to fibrosis, in neovascular age-related macular degeneration (nAMD) longitudinally. AMD is the most important cause of vision loss of the elderly in industrialized countries. Despite optimal treatment about 50% of eyes with nAMD develop fibrosis within 2 years, causing irreversible damage to the retina and functional loss. Objective measurement of fibrosis, however, is challenging, since clinical staging is subjective and current imaging modalities such as color fundus photography (CFP), fluorescein angiography (FA) and optical coherence tomography (OCT) often do not allow clear delineation. Novel ...

Neovascular age-related macular degeneration (nAMD) is characterized by the abnormal growth of blood vessels from the choroid into the subretinal space which leads to sub- and intraretinal fluid accumulation, hemorrhages and subretinal fibrosis with progressive loss of central vision. Intravitreal anti-VEGF treatment is the standard of care. Intravitreal anti-VEGF application might temporarily increase intraocular pressure due to a volume effect. It remains unclear if repeated injections might have an impact on retinal capillary perfusion. Therefore this study aims to investigate the vascular microcirculation differences between patients who received longterm intravitreal Anti-VEGF treatment and patients who recently started Anti-VEGF treatment using ...

The investigators have developed a new technology, termed in-vivo laser capture microdissection (IVLCM), that addresses the limitations of endoscopic biopsy for screening for BE and provides targeted genomic profiling of aberrant tissue for more precise prediction of EAC risk. The device is a tethered capsule endomicroscope (TCE) that implements optical coherence tomography (OCT) to grab 10-mm-resolution, cross-sectional microscopic images of the entire esophagus after the capsule is swallowed. This OCT-based TCE technology is used in unsedated patients to visualize images of BE and dysplastic BE. During the IVLCM procedure, TCE images of abnormal BE tissue are identified in real time ...

Dual beam Doppler Fourier-domain Optical coherence tomography (DOCT) is a noninvasive technique to quantify total retinal blood flow. To enable further development of this technique it is essential to assess short- and long-term reproducibility of DOCT blood flow measurements. In the present study, total retinal blood flow will be measured with DOCT at multiple time points to gain information of short- and long-term reproducibility. In addition, provocation with flickering light will be performed, which is known to lead to vasodilatation and an increase in retinal blood flow in healthy subjects. Vessel diameters will also be measured using the Dynamic Vessel ...

Significant left main (LM) stenosis is associated with a poor prognosis, therefore, adequate judgement of the prognostic significance of LM stenosis is essential to improve patients' prognosis. Recently, fractional flow reserve (FFR) has become widespread practice and carries a Class Ia recommendation to assess functional significance of intermediate coronary stenosis in patients with stable angina. Intravascular ultrasound (IVUS)-derived minimum lumen area (MLA) represents an accurate measure to determine LM significance as shown in multiple studies, while optical coherence tomography (OCT) ,which is a novel intracoronary imaging method with a greater spatial resolution (15μm vs. 100μm), faster image ...

This study is a prospective, registry trial aimed to compare the clinical and angiographic outcomes of OCT-guided and angiography-guided PCI in patients with coronary DES-ISR.

This is an observational study using OCT angiography to assist with tumor characterization in melanotic and amelanotic iris lesions. OCT angiography data from healthy eyes will be compared to eyes with various types of iris tumors.

During long-term follow-up heart transplant recipients are at risk of developing different complications that are likely to affect quality of life and survival. The most common cause of death during the later stages after heart transplantation is cardiac allograft vasculopathy, followed by unexplained graft dysfunction. In this study, advanced imaging techniques will be used to describe the frequency of these two complications, examine possible risk factors and study consequences on functional capacity and quality of life. Further, the investigators will investigate whether it is feasible to screen for these conditions with non-invasive imaging methods. By studying patients that have performed ...

Little knowledge exist on the short and long-term ophthalmological effect of the dialysis. Some studies stated a variation of the thickness subfoveal choroidal before and after a session of dialyse as well as variations of the coat of optical fibers measured in OCT. The Optical Coherence Tomography angiography OCT is a not invasive imaging technique which is now a part of examinations of investigation in imaging of retina. This technique allows to study the retinal macula vascularization without injection of contrast agent and thus allows to deepen the knowledge in medical domains where the exploration was to limited because of ...

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.

Given the inherent limitations of coronary angiography to depict the presence of functionally significant epicardial coronary stenosis and discrepancy between angiographic stenosis severity and the presence of myocardial ischemia, invasive physiologic indices such as fractional flow reserve (FFR) or instantaneous wave-free ratio (iFR) has been a standard method to guide decision of revascularization. Intravascular ultrasound (IVUS) and optical coherence tomography (OCT) are an intracoronary imaging method able to provide information about lumen area, vessel area, plaque burden, and plaque characteristics that can be used for the guidance of revascularization procedure. Several previous studies explored the diagnostic performance of intravascular imaging-defined ...

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 ...

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 ...

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 ...

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 ...