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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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Dentsply Sirona (NSDQ:XRAY) was awarded $6.8 million in damages in a trade secret suit after the ex-engineer accused of stealing the designs stopped participating in the legal proceedings, according to court documents. Former engineer Jian Lu was accused of stealing trade secrets related to a 3- imaging system for the company’s Apollo DI device, according to court documents. Lu left the company in 2013 and reportedly took with him trade secrets, including technical documents, copyrighted software and a pre-production model of the imaging system to develop a competing product, according to the documents. A short ...
Source: Mass Device - Category: Medical Devices Authors: Tags: Legal News Dentsply Sirona Source Type: news
Publication date: February 2018 Source:Materials Research Bulletin, Volume 98 Author(s): Kaihang Luo, Shanyuan Niu, Dhyey Shah, Amogh Lonkar, Yang Liu, Jayakanth Ravichandran We propose multilayers of perovskite and related ternary oxides with a general formula of ABO3 as high reflectivity mirrors, especially for use in water window region (2.3–4.4nm). The high reflectivity combinations of oxide multilayers were deduced using evolutionary search algorithms such as genetic algorithms, and the calculation speed was accelerated via parallel computing methods We also propose a figure of merit for X-ray reflectivity in p...
Source: Materials Research Bulletin - Category: Materials Science Source Type: research
In this study, we explored whether the image quality acquired by the digital radiography system can be improved with a modified convolutional neural network to generate high-resolution images with reduced noise from the original low-quality images. The experiment evaluated on a test dataset, which contains 5 X-ray images, showed that the proposed method outperformed the traditional methods (i.e., bicubic interpolation and 3D block-matching approach) as measured by peak signal to noise ratio (PSNR) about 1.3 dB while kept highly efficient processing time within one second. Experimental results demonstrated that a residual...
Source: Journal of X-Ray Science and Technology - Category: Radiology Tags: J Xray Sci Technol Source Type: research
Authors: Gong C, Cai Y, Zeng L Abstract For cone-beam computed tomography (CBCT), transversal shifts of the rotation center exist inevitably, which will result in geometric artifacts in CT images. In this work, we propose a novel geometric calibration method for CBCT, which can also be used in micro-CT. The symmetry property of the sinogram is used for the first calibration, and then L0-norm of the gradient image from the reconstructed image is used as the cost function to be minimized for the second calibration. An iterative search method is adopted to pursue the local minimum of the L0-norm minimization problem. ...
Source: Journal of X-Ray Science and Technology - Category: Radiology Tags: J Xray Sci Technol Source Type: research
Authors: Wang H, Zhao T, Li LC, Pan H, Liu W, Gao H, Han F, Wang Y, Qi Y, Liang Z Abstract The malignancy risk differentiation of pulmonary nodule is one of the most challenge tasks of computer-aided diagnosis (CADx). Most recently reported CADx methods or schemes based on texture and shape estimation have shown relatively satisfactory on differentiating the risk level of malignancy among the nodules detected in lung cancer screening. However, the existing CADx schemes tend to detect and analyze characteristics of pulmonary nodules from a statistical perspective according to local features only. Enlightened by the ...
Source: Journal of X-Ray Science and Technology - Category: Radiology Tags: J Xray Sci Technol Source Type: research
This study aims to investigate and test a new image reconstruction algorithm applying to the low-signal projections to generate high quality images by reducing the artifacts and noise in the cone-beam computed tomography (CBCT). For the low-signal and noisy projections, a multiple sampling method is first utilized in projection domain to suppress environmental noise, which guarantees the accuracy of the data for reconstruction, simultaneously. Next, a fuzzy entropy based method with block matching 3D (BM3D) filtering algorithm is employed to improve the image quality to reduce artifacts and noise in image domain. Then, sim...
Source: Journal of X-Ray Science and Technology - Category: Radiology Tags: J Xray Sci Technol Source Type: research
CONCLUSIONS: Three proposed pixel-driven projection methods achieved more accurate iterative image reconstruction results. These new and more accurate methods can also be easily extended to other imaging modalities. Among them, SPLD method should be recommended to 3D and four dimensional (4D) EPR imaging. PMID: 29036875 [PubMed - as supplied by publisher]
Source: Journal of X-Ray Science and Technology - Category: Radiology Tags: J Xray Sci Technol Source Type: research
Pulmonary veno-occlusive disease is a rare subcategory of pulmonary arterial hypertension (WHO Group 1). The disease is poorly understood and difficult to diagnose; it has no definitive cure to date. These patients present with nonspecific symptoms, including dyspnea, exercise intolerance, and weakness. Chest x-rays sometimes differ from idiopathic pulmonary arterial hypertension and may demonstrate alveolar infiltrates and pleural effusions. High resolution computed tomography scans reveal ground glass opacities, interlobular septal thickening, and lymphadenopathy.
Source: Respiratory Medicine - Category: Respiratory Medicine Authors: Tags: Review article Source Type: research
AbstractPurposeThe line of sight when whole-spine radiographs are taken has not been defined. In our 2012 health screening study (TOEI study), whole-spine radiographs were taken with the volunteers in the most relaxed position and with a horizontal gaze. However, in the TOEI 2014 study, a mirror was placed in front of their faces to unify their line of sight. To our knowledge, there are no reports on how the sagittal alignment changes when radiographs are taken using a mirror. The purpose of this study was to investigate how mirror placement impacted sagittal spinal alignment in whole-spine radiographs taken while standing...
Source: European Spine Journal - Category: Orthopaedics Source Type: research
Condition:   SPINAL Fracture Intervention:   Radiation: Xrays Sponsor:   Assiut University Not yet recruiting
Source: ClinicalTrials.gov - Category: Research Source Type: clinical trials
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