Advertisement

Topics

PubMed Journals Articles About "Pocket Sized Retina Camera Dilating Required" RSS

09:22 EST 17th December 2018 | BioPortfolio

Pocket Sized Retina Camera Dilating Required PubMed articles on BioPortfolio. Our PubMed references draw on over 21 million records from the medical literature. Here you can see the latest Pocket Sized Retina Camera Dilating Required articles that have been published worldwide.

More Information about "Pocket Sized Retina Camera Dilating Required" on BioPortfolio

We have published hundreds of Pocket Sized Retina Camera Dilating Required news stories on BioPortfolio along with dozens of Pocket Sized Retina Camera Dilating Required Clinical Trials and PubMed Articles about Pocket Sized Retina Camera Dilating Required for you to read. In addition to the medical data, news and clinical trials, BioPortfolio also has a large collection of Pocket Sized Retina Camera Dilating Required Companies in our database. You can also find out about relevant Pocket Sized Retina Camera Dilating Required Drugs and Medications on this site too.

Showing "Pocket sized retina camera dilating required" PubMed Articles 1–25 of 7,300+

Morphology and ultrastructure of the infrabuccal pocket and its lining epithelium in workers of Ectomomyrmex javanus (Hymenoptera: Formicidae).

This paper describes the morphology and ultrastructure of the infrabuccal pocket in workers of the carnivorous ant Ectomomyrmex javanus, using SEM and TEM. The infrabuccal pocket is a flexible bag with a diameter of 330 ± 30 μm. In its anterior part, the pocket wall reaches a thickness of 24.45 ± 3.45 μm, which is thicker than the wall lining the rest of the infrabuccal pocket, where it measures 6.87 ± 1.12 μm. The epidermal cells of the wall form a thickened epithelium with a thickn...


Camera Shutter-Independent Registration and Rectification.

Inevitable camera motion during exposure does not augur well for free-hand photography. Distortions introduced in images can be of different types and mainly depend on the structure of the scene, the nature of camera motion, and the shutter mechanism of the camera. In this paper, we address the problem of registering images taken from global shutter and rolling shutter (RS) cameras and reveal the constraints on camera motion that admit registration, change detection, and rectification. Our analysis encompas...

Sensory Biology: How to Structure a Tailor-Made Retina.

A new study of the zebrafish retina using sophisticated imaging has revealed how anisotropic properties of the retina are closely matched to the statistics of the natural visual world that the fish experiences.


Magic Circle.

Full-horizon cylindrical projections of the optic array are in common use. One wonders whether the public actually profits from such pictorial information, since the space behind one's back does not exist in visual awareness. In an experiment, a test image included six persons located at the corners of an irregular hexagon centred at the camera. Two persons faced the camera, two turned their back to the camera and two others faced a direction at right angles to the camera. The distances to the camera were u...

Protein pocket detection via convex hull surface evolution and associated Reeb graph.

Protein pocket information is invaluable for drug target identification, agonist design, virtual screening and receptor-ligand binding analysis. A recent study indicates that about half holoproteins can simultaneously bind multiple interacting ligands in a large pocket containing structured sub-pockets. Although this hierarchical pocket and sub-pocket structure has a significant impact to multi-ligand synergistic interactions in the protein binding site, there is no method available for this analysis. This ...

Reconsidering the Postoperative Day 0 Visit for Retina Surgery.

This study compares outcomes of patients who were examined on postoperative (PO) day 0 and PO day 1 following retina surgery.

Genetic Testing for Retina Specialists.

Astatine-211 imaging by a Compton camera for targeted radiotherapy.

Astatine-211 is a promising radionuclide for targeted radiotherapy. It is required to image the distribution of targeted radiotherapeutic agents in a patient's body for optimization of treatment strategies. We proposed to image At with high-energy photons to overcome some problems in conventional planar or single-photon emission computed tomography imaging. We performed an imaging experiment of a point-like At source using a Compton camera, and demonstrated the capability of imaging At with the high-energy ...

INNER MACULAR CHANGES AFTER VITRECTOMY WITH INTERNAL LIMITING MEMBRANE PEELING FOR RHEGMATOGENOUS RETINAL DETACHMENT: Similarity With Alport Syndrome.

The internal limiting membrane (ILM), the innermost basement membrane of the retina, is peeled occasionally during vitreous surgery. This study aimed to investigate the effect of ILM loss on the retina.

General Model of Photon-Pair Detection with an Image Sensor.

We develop an analytic model that relates intensity correlation measurements performed by an image sensor to the properties of photon pairs illuminating it. Experiments using an effective single-photon counting camera, a linear electron-multiplying charge-coupled device camera, and a standard CCD camera confirm the model. The results open the field of quantum optical sensing using conventional detectors.

Flavin homeostasis in the mouse retina during aging and degeneration.

Involvement of flavin adenine dinucleotide (FAD) and flavin mononucleotide (FMN) in cellular homeostasis has been well established for tissues other than the retina. Here, we present an optimized method to effectively extract and quantify FAD and FMN from a single neural retina and its corresponding retinal pigment epithelium (RPE). Optimizations led to detection efficiency of 0.1 pmol for FAD and FMN while 0.01 pmol for riboflavin. Interestingly, levels of FAD and FMN in the RPE were found to be 1.7- and 1...

Comparative proteomic analysis of normal and gliotic PVR retina and contribution of Müller glia to this profile.

Müller glia are responsible for the neural retina regeneration observed in fish and amphibians throughout life. Despite the presence of these cells in the adult human retina, there is no evidence of regeneration occurring in humans following disease or injury. It may be possible that factors present in the degenerated retina could prevent human Müller glia from proliferating and neurally differentiating within the diseased retina. On this basis, investigations into the proteomic profile of these cells and...

Immune cells in the retina and choroid: Two different tissue environments that require different defenses and surveillance.

In the eye immune defenses must take place in a plethora of differing microenvironments ranging from the corneal and conjunctival epithelia facing the external environment to the pigmented connective tissue of the uveal tract containing smooth muscle, blood vessels and peripheral nerves to the innermost and highly protected neural retina. The extravascular environment of the neural retina, like the brain parenchyma, is stringently controlled to maintain conditions required for neural transmission. The uniqu...

let-7 MicroRNA-Mediated Regulation of Shh Signaling and the Gene Regulatory Network Is Essential for Retina Regeneration.

Upon injury, Müller glia cells of the zebrafish retina reprogram themselves to progenitor cells with stem cell characteristics. This necessity for retina regeneration is often compromised in mammals. We explored the significance of developmentally inevitable Sonic hedgehog signaling and found its necessity in MG reprogramming during retina regeneration. We report on stringent translational regulation of sonic hedgehog, smoothened, and patched1 by let-7 microRNA, which is regulated by Lin28a, in Müller gl...

A Random Forest classifier-based approach in the detection of abnormalities in the retina.

Classification of abnormalities from medical images using computer-based approaches is of growing interest in medical imaging. Timely detection of abnormalities due to diabetic retinopathy and age-related macular degeneration is required in order to prevent the prognosis of the disease. Computer-aided systems using machine learning are becoming interesting to ophthalmologists and researchers. We present here one such technique, the Random Forest classifier, to aid medical practitioners in accurate diagnosis...

Impact of euthanasia, dissection and postmortem delay on metabolic profile in mouse retina and RPE/choroid.

Metabolomics studies in the retina and retinal pigment epithelium (RPE) in animal models or postmortem donors are essential to understanding the retinal metabolism and to revealing the underlying mechanisms of retinal degenerative diseases. We have studied how different methods of euthanasia (CO or cervical dislocation) different isolation procedures and postmortem delay affect metabolites in mouse retina and RPE/choroid using LC MS/MS and GC MS. Compared with cervical dislocation, CO exposure for 5 min d...

Correcting geometric distortions in stereoscopic 3D imaging.

Motion in a distorted virtual 3D space may cause visually induced motion sickness. Geometric distortions in stereoscopic 3D can result from mismatches among image capture, display, and viewing parameters. Three pairs of potential mismatches are considered, including 1) camera separation vs. eye separation, 2) camera field of view (FOV) vs. screen FOV, and 3) camera convergence distance (i.e., distance from the cameras to the point where the convergence axes intersect) vs. screen distance from the observer. ...

Immune regulation in the aging retina.

The retina is an immune privileged tissue, which is protected from external and internal insults by its blood-retinal barriers and immune suppressive microenvironment. Apart from the avoidance and tolerance strategies, the retina is also protected by its own defense system, i.e., microglia and the complement system. The immune privilege and defense mechanisms work together to maintain retinal homeostasis. During aging, the retina is at an increased risk of developing various degenerative diseases such as ag...

Large field of view imaging system for remote target capture and trajectory measurement based on cone rotation.

In the remote target trajectory measurement system, because of the size limitation of the image sensor, the angle of view of the current telephoto camera is very small, which cannot meet the requirements of target acquisition. After comparing the current large-field imaging methods, a scheme of a large field of view (FoV) and high frame rate scanning by controlling the camera to perform conical rotation is proposed, and a 3 × 3 external FoV stitching system that includes the scheme is designed. An experime...

An empirical cross-validation of denoising filters for PRNU extraction.

The present work is an empirical study to check the importance of widely used PRNU extraction de-noising filters at different stages of source camera identification procedure. The proposed work is unique in the sense that it gives an idea about the choice of the appropriate de-noising filters at the time of PRNU extraction for formation of unique identification pattern of digital camera and noise residue extraction of query image. Also in this work, we have suggested the best values of σ (noise variance) f...

Research Developments in the Treatment of Retinal Disease: Finalists From the Inaugural Retina Research Scholar Honoree Program.

Endoscopic System Based on Intraoral Camera and Image Processing.

In dentistry, dentists perform many treatments with a few visually magnified information. About deep area of root canals, it commonly relies on exploration carried out with the fingers of the dentist, because the root canal entrance is very small to be observed. In clinical practice, the intraoral camera and endoscopic systems are separate devices, and there are no sensors to capture both pictures of the whole tooth and those inside the root canal. Objective of this research is to combine the intraoral came...

Levels of retinal IAPP are altered in Alzheimer's disease patients and correlate with vascular changes and hippocampal IAPP levels.

Islet amyloid polypeptide (IAPP) forms toxic aggregates in the brain of patients with Alzheimer's disease (AD). Whether IAPP also affects the retina in these patients is still unknown. Levels of IAPP in soluble and insoluble homogenate fractions of retina and hippocampus from AD patients and nondemented controls were analyzed using ELISA. Number of pericytes and vessel length were determined by analysis of immunostained retina and hippocampus. Insoluble retinal fractions of AD patients contained lower level...

Material Classification from Time-of-Flight Distortions.

This paper presents a material classification method using an off-the-shelf Time-of-Flight (ToF) camera. The proposed method is built upon a key observation that the depth measurement by a ToF camera is distorted for objects with certain materials, especially with translucent materials. We show that this distortion is due to the variation of time domain impulse responses across materials and also due to the measurement mechanism of the ToF cameras. Specifically, we reveal that the amount of distortion varie...

Tracking seasonal rhythms of plants in diverse ecosystems with digital camera imagery.

Global change is shifting the seasonality of vegetation in ecosystems around the globe. High-frequency digital camera imagery, and vegetation indices derived from that imagery, is facilitating better tracking of phenological responses to environmental variation. This method, commonly referred to as the "phenocam" approach, is well-suited to several specific applications, including: close-up observation of individual organisms; long-term canopy-level monitoring at individual sites; automated regional-to-cont...


Advertisement
Quick Search
Advertisement
Advertisement