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

01:05 EST 20th February 2018 | BioPortfolio

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Showing "Pocket sized retina camera dilating required" PubMed Articles 1–25 of 7,400+

Educational value of pocket-sized ultrasound devices to improve understanding of ultrasound examination principles and sonographic anatomy for medical student.

Medical students must understand the principles of ultrasonography (US), because US examinations are an important component of patient care in clinical practice. Pocket-sized ultrasound devices have the benefits of accessibility and ease of use. The primary objective of the present study was to evaluate the educational value of these devices in terms of improving medical student interest and understanding of US and sonographic anatomy.

Smartphone Fundus Photography.

Smartphone fundus photography is a simple technique to obtain ocular fundus pictures using a smartphone camera and a conventional handheld indirect ophthalmoscopy lens. This technique is indispensable when picture documentation of optic nerve, retina, and retinal vessels is necessary but a fundus camera is not available. The main advantage of this technique is the widespread availability of smartphones that allows documentation of macula and optic nerve changes in many settings that was not previously poss...

Glaucoma Screening in Nepal: Cup to Disc Estimate with Standard Mydriatic Fundus Camera Compared to Portable Non-mydriatic Camera.

To compare cup to disc ratio (CDR) measurements from images taken with a portable, 45° non-mydriatic fundus camera to images from a traditional table-top mydriatic fundus camera.

Nuclear Respiratory Factor-1 (NRF-1) Regulates Transcription of the CXC Receptor 4 (CXCR4) in the Rat Retina.

The CXC receptor 4 (CXCR4) is required for various physiologic and pathologic processes in the eye, including stem cell trafficking, neuronal development, immune responses, and ocular neovascularization. Here, we used the rat retina models to determine the mechanisms driving CXCR4 transcription.

Optical Coherence Tomography in Patients With the Subretinal Implant Retina Implant Alpha IMS.

The aim of this study was to assess changes in retinal structure and thickness after subretinal implantation of the Retina Implant Alpha IMS (Retina Implant AG, Reutlingen, Germany).

Development of a 3-D visible limiter imaging system for the HSX stellarator.

A visible camera diagnostic has been developed to study the Helically Symmetric eXperiment (HSX) limiter plasma interaction. A straight line view from the camera location to the limiter was not possible due to the complex 3D stellarator geometry of HSX, so it was necessary to insert a mirror/lens system into the plasma edge. A custom support structure for this optical system tailored to the HSX geometry was designed and installed. This system holds the optics tube assembly at the required angle for the desi...

Electroretinographic Assessment of Inner Retinal Signaling in the Isolated and Superfused Murine Retina.

Longer-lasting electroretinographic recordings of the isolated murine retina were initially achieved by modification of a phosphate-buffered nutrient solution originally developed for the bovine retina. During experiments with a more sensitive mouse retina, apparent model-specific limitations were addressed and improvements were analyzed for their contribution to an optimized full electroretinogram (ERG).

Inverse conversion algorithm for an all-optical depth coloring camera.

Three-dimensional (3D) metrology has received a lot of attention from academic and industrial communities due to its broad applications, such as 3D contents, 3D printing, and autonomous driving. The all-optical depth coloring (AODC) camera has some benefits in computation load since it extracts depth information of an object fully optically. The AODC camera represents the depth of the object as a variation of wavelength, and spectroscopy is generally required to measure the wavelength. However, in the AODC ...

Evaluation of a novel collimator for molecular breast tomosynthesis.

This study investigated a novel gamma camera for molecular breast tomosynthesis (MBT), which is a nuclear breast imaging method that uses limited angle tomography. The camera is equipped with a variable angle, slant-hole (VASH) collimator that allows the camera to remain close to the breast throughout the acquisition. The goal of this study was to evaluate the spatial resolution and count sensitivity of this camera and to compare contrast and contrast-to-noise ratio (CNR) with conventional planar imaging us...

Oxford specialist handbooks in neurology: Stroke Medicine.

This is a pocket sized book (if your pockets are 20×18×2 cm big, that is) and it weighs less than two decent stethoscopes. Its small physical size belies the comprehensive coverage given to the subject. It is a really a compact textbook covering all aspects of stroke care.

Technical Note: Automated quantitative analysis of planar scintigraphic resolution with the ACR SPECT phantom.

Evaluating gamma camera image quality is a routine task required for annual physics surveys and laboratory accreditation. A common method is visual assessment of a planar view of the American College of Radiology (ACR) phantom, for which a satisfactory result is to resolve 7.9 mm diameter cold rods with high contrast. The objective is to investigate an automated quantitative measure of planar image quality for more precise evaluation of gamma camera performance.

Imaging of the thyroid and parathyroid using a cardiac cadmium zinc telluride camera: Phantom studies.

Purpose: Cadmium zinc telluride (CZT) detectors have recently been introduced to the field of clinical nuclear cardiology. However, the feasibility of using them for organs other than the heart remains unclear. The aim of this study was to evaluate the potential of a cardiac CZT camera to acquire thyroid and parathyroid images. We used custom-made phantoms and the currently available standard protocols for CZT, instead of a sodium-iodine scintillation (NaI) camera. Materials and Methods: Thyroid phantoms wi...

Grain Refinement and Mechanical Properties of Cu-Cr-Zr Alloys with Different Nano-Sized TiCp Addition.

The TiCp/Cu master alloy was prepared via thermal explosion reaction. Afterwards, the nano-sized TiCp/Cu master alloy was dispersed by electromagnetic stirring casting into the melting Cu-Cr-Zr alloys to fabricate the nano-sized TiCp-reinforced Cu-Cr-Zr composites. Results show that nano-sized TiCp can effectively refine the grain size of Cu-Cr-Zr alloys. The morphologies of grain in Cu-Cr-Zr composites changed from dendritic grain to equiaxed crystal because of the addition and dispersion of nano-sized TiC...

Whither (or Wither) Adherence to Retina Trial Protocols in Clinical Practice?

Gaze gesture based human robot interaction for laparoscopic surgery.

While minimally invasive surgery offers great benefits in terms of reduced patient trauma, bleeding, as well as faster recovery time, it still presents surgeons with major ergonomic challenges. Laparoscopic surgery requires the surgeon to bimanually control surgical instruments during the operation. A dedicated assistant is thus required to manoeuvre the camera, which is often difficult to synchronise with the surgeon's movements. This article introduces a robotic system in which a rigid endoscope held by a...

POVME 3.0: Software for Mapping Binding Pocket Flexibility.

We present a substantial update to the open-source POVME binding pocket analysis software. New capabilities of POVME 3.0 include a flexible chemical coloring scheme for feature identification, post-analysis tools for comparing large ensembles of pockets (e.g., from molecular dynamics simulations), and the introduction of scripts and methods that facilitate binding pocket comparison and analysis. We envision the use of this software for visualization of binding pocket dynamics, selection of representative st...

Intraoperative Video Production With a Head-Mounted Consumer Video Camera.

The use of high-definition video in surgical education is becoming increasingly popular. Because of the availability of relatively inexpensive, consumer-grade video cameras, surgeons with minimal video production experience can produce high-quality surgical videos. A number of video capture methods are available, with varying degrees of production quality, economic constraint, and level of attention required from the operating surgeon. The accompanying video provides an overview of the advantages and disadv...

Camera traps and activity signs to estimate wild boar density and derive abundance indices.

Populations of wild boar and feral pigs are increasing worldwide, in parallel with their significant environmental and economic impact. Reliable methods of monitoring trends and estimating abundance are needed to measure the effects of interventions on population size. The main aims of this study, carried out in five English woodlands were 1. to compare wild boar abundance indexed obtained from camera trap surveys and from activity signs and 2. to assess the precision of density estimates in relation to dif...

The periodontal pocket.

Periodontal disease is synonymous with the presence of periodontal pockets, and very often the clinical success of periodontal therapy is based on periodontal pocket depth reduction. Therefore, in the fields of periodontology and implant dentistry, significant research effort has been placed on the etiopathogenesis, diagnosis and treatment of periodontal/peri-implant disease and as a consequence on pocket pathology. In this volume of Periodontology 2000, the in-depth reviews include topics ranging from prec...

How Nothing Boosts Affinity: Hydrophobic Ligand Binding to the Virtually Vacated S1' Pocket of Thermolysin.

We investigated the hydration state of the deep, well accessible hydrophobic S1' specificity pocket of the metalloprotease thermolysin with purposefully designed ligands using high-resolution crystallography and isothermal titration calorimetry. The S1' pocket is known to recognize selectively a very stringent set of aliphatic side chains such as valine, leucine and isoleucine of putative substrates. We engineered a weak-binding ligand covering the active site of the protease without addressing the S1' pock...

The aging rat retina: from function to anatomy.

In healthy beings, age is the ultimate reason of cellular malfunction and death. In the rat retina, age causes a functional decline and loss of specific neuronal populations. In this regard, controversial conclusions have been reported for the innermost retina. Here, we have studied the albino and pigmented retina for the duration of the rat life-span. Independent of age (21 days-22 months), the electroretinographic recordings and the volume of the retina and its layers are smaller in albinos. Functionall...

Cross calibration of (123)I-meta-iodobenzylguanidine heart-to-mediastinum ratio with D-SPECT planogram and Anger camera.

Cardiac (123)I-meta-iodobenzylguanidine (MIBG) uptake is quantified using the heart-to-mediastinum ratio (HMR) with an Anger camera. The relationship between HMR determined using D-SPECT with a cadmium-zinc-telluride detector and an Anger camera is not fully understood. Therefore, the present study aimed to define this relationship using images derived from a phantom and from patients.

Optical coherence tomography identifies outer retina thinning in frontotemporal degeneration.

Whereas Alzheimer disease (AD) is associated with inner retina thinning visualized by spectral-domain optical coherence tomography (SD-OCT), we sought to determine if the retina has a distinguishing biomarker for frontotemporal degeneration (FTD).

Aging and hypertension decrease endothelial NO-related dilating function and gamma-glutamyltransferase activity but not S-nitrosoglutathione-induced aortic vasodilation.

S-nitrosoglutathione (GSNO), which is involved in the transport and the storage of NO, induces vasorelaxation. It requires gamma-glutamyl-transferase (GGT), an enzyme present on the endothelium, to transfer NO into the cell. We evaluated whether aging and hypertension, which induce NO-related dilating dysfunction, are associated with decreased vascular GGT activity and modify the vasorelaxant effect of GSNO. Thoracic aortic rings isolated from male Spontaneous Hypertensive Rats (SHR) and Wistar Kyoto Rats (...

Avoiding the pocket: A case report of coiling of distal shunt catheter into subcutaneous pocket.

Hydrocephalus is one of the most common disorders of neurosurgery and ventricular shunting, the primary surgical intervention, malfunctions in 85% of patients by 10 years.

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