‘Radiating Shoe Sales’

By: Vanessa Burrows Since the discovery of X-rays in the late 19th century, the technology has enhanced health care in a variety of ways. Like many cutting-edge scientific developments, however, it also has inspired uses of uncertain therapeutic value. That was the case with the shoe-fitting fluoroscope, the subject of the latest episode of FDA’s history video series. Marketed as a scientific method for optimizing shoe fit, the fluoroscope appeared in shoe stores nationwide from the 1920s to the 1960s. But the machines not only didn’t do what they promised, they also exposed children, their parents, and store clerks to unhealthy doses of radiation. In the late 1940s, scientists and regulators began to raise serious concerns about the dangerous levels of radiation. Over the next two decades, individual states gradually took action to either ban or restrict the use of the device. By the 1970s, concerns grew about radiation emitted from common appliances, such as televisions and microwave ovens. And in 1971, FDA was given authority to regulate radiation-emitting devices. The agency continues this oversight, working to protect consumers from harmful novelty devices like the shoe-fitting fluoroscope. FDA also sets standards for medical imaging, surgical and therapeutic equipment, security systems, and consumer products – all for the protection of the health of American consumers. We hope you enjoy your visit to FDA’s HistoryVault. Vanessa Burrows is an FDA...
Source: Mass Device - Category: Medical Devices Authors: Tags: Blog FDA Voice Source Type: news

Related Links:

An artificial intelligence (AI) algorithm can prescreen head CT exams for a...Read more on AuntMinnie.comRelated Reading: AI characterizes complex mood disorders from fMRI 3 ways to ensure AI algorithms are really working Initiative aims to apply AI to traumatic brain injury AI can find, classify pleural effusions on chest x-rays Can AI learn how to understand radiologist reports?
Source: AuntMinnie.com Headlines - Category: Radiology Source Type: news
In this study, effects of the synthesised AgNPs were also evaluated on nucellus tissues germination frequency and biochemical parameters of plant tissues. Nucellus tissues of Citrus reticulata were inoculated on MS medium supplemented with 10, 20, 30 and 40 μg/ml suspension of the synthesised AgNPs. Green synthesised AgNPs enhanced the in vitro germination because of low toxicity and nonfriendly issues. Significant results were obtained for germination parameters i.e. root and shoot length and seedling vigour index in response to 30 μg/ml suspension of green synthesised AgNPs. The 30 μ/ml suspension of AgNPs also ...
Source: IET Nanobiotechnology - Category: Nanotechnology Source Type: research
Button battery ingestion is a big deal. So much so that The National Battery Ingestion Hotline (NBIH) was created in 1982 to study and advise best practices. They look at all types of batteries but swallowed button batteries account for 94% of batteries ingested. Until recently the agreed-upon first aid guidelines for a swallowed button battery were to take nothing at all by mouth (no oral intake!) but to get to the ER as soon as possible for timely x-rays to find the position of the battery, before promptly removing the battery with an endoscope. Who Swallows Button Batteries? Kids swallow button batteries, particularly k...
Source: Conversations with Dr Greene - Category: Child Development Authors: Tags: Dr. Greene's Blog Household Safety Toddler Health & Safety Source Type: blogs
Many patients undergoing mechanical ventilation continue to receive daily chest...Read more on AuntMinnie.comRelated Reading: Johns Hopkins tackles problem of unnecessary scans MedPAC: Imaging still high on low-value service list Choosing Wisely drives down imaging use -- sometimes Clinical decision support can cut inappropriate imaging Study questions daily chest x-rays for intensive care patients
Source: AuntMinnie.com Headlines - Category: Radiology Source Type: news
Publication date: Available online 9 August 2018Source: Physics of the Dark UniverseAuthor(s): Ariel ZhitnitskyAbstractWe advocate the idea that the nanoflares conjectured by Parker long ago to resolve the corona heating problem, may also trigger the larger solar flares. The arguments are based on the model where emission of extreme ultra violet (EUV) radiation and soft x-rays from the Sun are powered externally by incident dark matter particles within the Axion Quark Nugget (AQN) Dark Matter Model. The corresponding annihilation events of the AQNs with the solar material are identified with nanoflares. This model was orig...
Source: Physics of the Dark Universe - Category: Physics Source Type: research
ConclusionCentral wall acetabular fractures, although unrecognized intra- and post-operatively may impair implant survival after THA.
Source: International Orthopaedics - Category: Orthopaedics Source Type: research
The PETRA IV project aims at upgrading the present synchrotron radiation source PETRA   III at DESY into an ultralow-emittance source. Being diffraction limited up to X-rays of about 10   keV, PETRA   IV will be ideal for three-dimensional X-ray microscopy of biological, chemical and physical processes under realistic conditions at length scales from atomic dimensions to millimetres and time scales down to the sub-nanosecond regime. In this way, it will enable groundbreaking studies in many fields of science and industry, such as health, energy, earth and environment, mobility and information technology. The science ...
Source: Journal of Synchrotron Radiation - Category: Physics Authors: Tags: PETRA IV ultralow-emittance source diffraction-limited storage ring feature articles Source Type: research
delas Constanza Rubio The design of zone plates is an important topic in many areas of physics, such as optics, X-rays, microwaves or ultrasonics. In this paper, a zone plate design method, which provides high flexibility in the shaping of the focusing profile, is analyzed. This flexibility is achieved through the use of binary sequences that produce zone plates with different properties and applications. It is shown that this binary-sequence method works properly at low wavelengths, but requires a modification term to work accurately in high wavelength domains. This additional term extends this powerful design metho...
Source: Sensors - Category: Biotechnology Authors: Tags: Article Source Type: research
Abstract Surface fluorescence X-ray absorption fine structure (XAFS) spectroscopy using a Laue-type monochromator has been developed to acquire structural information about metals with a very low concentrate on a flat highly oriented pyrolytic graphite (HOPG) surface in the presence of electrolytes. Generally, surface fluorescence XAFS spectroscopy is hindered by strong scattering from the bulk, which often chokes the pulse counting detector. In this work, we show that a bent crystal Laue analyzer (BCLA) can efficiently remove the scattered X-rays from the bulk even in the presence of solution. We applied the tech...
Source: Chemical Record - Category: Chemistry Authors: Tags: Chem Rec Source Type: research
In an article entitled A new theory for X-ray diffraction [Fewster (2014). Acta Cryst. A70, 257 – 282], hereafter referred to as NTXRD, it is claimed that when X-rays are scattered from a small crystallite, whatever its size and shape, the diffraction pattern will contain enhanced scattering at angles of exactly 2 θ B, whatever the orientation of the crystal. It is claimed that in this way scattering from a powder, with randomly oriented crystals, gives rise to Bragg scattering even if the Bragg condition is never satisfied by an individual crystallite. The claims of the theory put forward in NTXRD are examined...
Source: Acta Crystallographica Section A - Category: Chemistry Authors: Tags: diffraction theory powder diffraction small crystals research papers Source Type: research
More News: Blogging | Child Development | Children | Health Management | History of Medicine | X-Ray