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‘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

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AbstractTo evaluate the association between the index and ring finger ’s (2D:4D) length ratio with the prevalence and severity of radiographic hand osteoarthritis (OA). A population-based sample included 802 males (mean age 46.98 ± 17.10 years) and 738 females (mean age 48.65 ± 16.62 years) who had participated in a Chuvashian skeletal aging study. Age, sex, basic demographics, anthropometric data and X-rays of both hands were acquired. Each hand was visually classified on X-ray as either type 1—index finger longer than the ring finger; type 2—index and ring fin...
Source: Rheumatology International - Category: Rheumatology Source Type: research
AbstractPurposeTo investigate if bone substitutes are strictly necessary to restore the vertebral body height and improve the clinical outcome, in patients with thoracolumbar or lumbar AO type A post-traumatic vertebral fractures, managed with balloon kyphoplasty combined with posterior screw and rod system.Methods105 patients with post-traumatic thoracolumbar spine fracture were recruited. At baseline, the patients underwent a CT and an MRI of the spine. Clinical evaluation was performed, using the Visual Analog Scale (VAS) and the Oswestry Disability Index (ODI), at baseline, 48  h after surgery, at 3-month follow-u...
Source: European Spine Journal - Category: Orthopaedics Source Type: research
Previously, we found genistein could sensitize cancer cells to low linear energy transfer (LET) X-rays via inhibiting DNA-PKcs activities. Especially, high-LET heavy ion produces more DNA double strand breaks (DSBs) than low-LET radiation. Thus, the study was designed to investigate the detailed molecular mechanisms of genistein on sensitizing cancer cells to heavy ions.
Source: Radiotherapy and Oncology - Category: Radiology Authors: Source Type: research
Authors: Wang D, Lin Y, Chen L, Mo Y, Huang P, Ma R Abstract Developmental dysplasia of the hip (DDH) is one of the most common diseases encountered in pediatric orthopedic departments. Current treatment strategies seek to improve acetabular coverage, the principal defect of acetabular dysplasia, but are not very successful. We developed a guided bone regeneration (GBR) strategy to improve acetabular coverage via bone tissue engineering (BTE). Poly-dl-lactide (PDLLA) membranes were seeded with bone marrow mesenchymal stem cells (BMSCs) to form a BTE complex, which was then implanted into the superior margin of the ...
Source: Oncotarget - Category: Cancer & Oncology Tags: Oncotarget Source Type: research
Chronic obstructive pulmonary disease affects millions of people in the United States. The main method of diagnosis is the pulmonary function tests (PFTs), in which a patient breathes into a machine that measures pulmonary parameters. The disadvantag...
Source: Medgadget - Category: Medical Devices Authors: Tags: Anesthesiology Cardiology Critical Care Diagnostics Exclusive Medicine Radiology Surgery Thoracic Surgery Source Type: blogs
ConclusionThis study showed an overall 16.3% radiological PCE and 1.4% symptomatic PCE incidence when CAFPS were used due to severe osteoporosis. The symptomatic PCE risk was significant when CAFPS were  >  7 levels; >  14 fenestrated screws; and >  20–25 cc cement volume is used and this may cause PAP increase and right ventricular dilatation.Graphical Abstract
Source: European Spine Journal - Category: Orthopaedics Source Type: research
J. Anal. At. Spectrom., 2018, Advance Article DOI: 10.1039/C8JA00029H, PaperJavier Merrill, Victor Montenegro, Michael F. Gazley, Leandro Voisin As altitude increases, air density decreases, and the physics of X-rays being transmitted through air mean that the transmission of low-energy X-rays increases and accordingly the transmission effectiveness of low-atomic weight elements (e.g. Mg, Al, and Si) also increases. Here we assess the performance of pXRF units across a range of pressures. To cite this article before page numbers are assigned, use the DOI form of citation above. The content of this RSS Feed (c) The Royal Society of Chemistry
Source: RSC - J. Anal. At. Spectrom. latest articles - Category: Chemistry Authors: Source Type: research
Follow me on Twitter @drClaire Children often complain of being tired. Usually it’s for simple reasons — because it’s the end of a busy day, or because they stayed up late the night before, or because they are trying to get out of doing something they don’t want to do. When kids are sick they are usually tired, and need more rest to get better. But when a child complains all the time, and fatigue starts to get in the way of things they usually enjoy, it could be a sign of a problem. Here are some possible reasons for chronic fatigue in children: Sleep problems. This makes sense, obviously, since if...
Source: Harvard Health Blog - Category: Consumer Health News Authors: Tags: Children's Health Fatigue Parenting Source Type: blogs
AbstractThe purpose of this work was to present body size and tube voltage-dependent equations for optimal selection of image acquisition parameters in guiding clinical X-ray imaging. The dose output of X-ray tubes was expressed as a function of the image acquisition parameters of tube voltage (kVp), tube current –exposure time product (mAs), and body size (d). Dose power (n) to kVp was determined to be a linear function of body size in an earlier phantom study. Tube voltage-dependent attenuation coefficients of water were used to determine the kVp effect on the depth dose of X-rays from the body ’s entrance su...
Source: Radiological Physics and Technology - Category: Physics Source Type: research
Abstract Copper (Cu)-doped calcium silicate nanoparticles were synthesized by a wet precipitation method as economical bone fracture filler. The aim was to improve the overall physicochemical properties, bioactivity, and biological performance of the bone fracture filler prepared herein. The synthesized nanoparticles were evaluated using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscopy (TEM). The bioactivity of the prepared nanoparticles was investigated after immersion in simulated body fluid (SBF) by means of inductively coupled plasma (ICP), SEM coup...
Source: Biomed Res - Category: Research Authors: Tags: J Biomed Mater Res B Appl Biomater Source Type: research
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