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https://www.readbyqxmd.com/read/28315824/near-field-investigation-of-the-explosive-dispersal-of-radioactive-material-based-on-a-reconstructed-spherical-blast-wave-flow
#1
David Hummel, Lucian Ivan
A "dirty bomb" is a type of radiological dispersal device (RDD) that has been the subject of significant safety and security concerns given the disruption that would result from a postulated terrorist attack. Assessing the risks of radioactive dose in a hypothetical scenario requires models that can accurately predict dispersion in a realistic environment. Modelling a RDD is complicated by the fact that the most important phenomena occur over vastly disparate spatial and temporal length scales. Particulate dispersion in the air is generally considered on scales of hundreds to thousands of meters, and over periods of minutes and hours...
March 15, 2017: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28302050/implementation-of-clinical-research-trials-using-web-based-and-mobile-devices-challenges-and-solutions
#2
EDITORIAL
Roy Eagleson, Luis Altamirano-Diaz, Alex McInnis, Eva Welisch, Stefanie De Jesus, Harry Prapavessis, Meghan Rombeek, Jamie A Seabrook, Teresa Park, Kambiz Norozi
BACKGROUND: With the increasing implementation of web-based, mobile health interventions in clinical trials, it is crucial for researchers to address the security and privacy concerns of patient information according to high ethical standards. The full process of meeting these standards is often made more complicated due to the use of internet-based technology and smartphones for treatment, telecommunication, and data collection; however, this process is not well-documented in the literature...
March 17, 2017: BMC Medical Research Methodology
https://www.readbyqxmd.com/read/28299610/pharmacovigilance-of-regenerative-medicine-under-the-amended-pharmaceutical-affairs-act-in-japan
#3
Yasuko Inokuma
Two Japanese regulatory agencies, the Ministry of Health, Labour and Welfare and the Pharmaceuticals and Medical Devices Agency announced the implementation of a new review system called 'Conditional Approval,' specifically for the emerging field of regenerative medicine, in an amendment to the Pharmaceutical Affairs Act in 2014. Regenerative medicine was regulated in the category of 'Medical Devices' prior to the amendment and was not covered by the Relief Service, a system that provides financial aid to people who have experienced an adverse drug reaction and developed serious side effects as a result...
March 15, 2017: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
https://www.readbyqxmd.com/read/28296442/secure-and-reliable-wireless-medical-device-and-mobile-connectivity
#4
David H Hoglund
No abstract text is available yet for this article.
March 2017: Biomedical Instrumentation & Technology
https://www.readbyqxmd.com/read/28295385/technical-note-the-design-and-function-of-a-horizontal-patient-rotation-system-for-the-purposes-of-fixed-beam-cancer-radiotherapy
#5
Ilana Feain, Lloyd Coleman, Hue Wallis, Richard Sokolov, Ricky O'Brien, Paul Keall
PURPOSE: Cancer radiation therapy treatment is performed by delivering a 3D dose distribution to the tumour via the relative rotation between beam and patient. Whilst most modern machines rotate the radiation beam around a still patient, the treatment can also be delivered by rotating the patient relative to a fixed beam. Fixed-beam, patient rotation radiotherapy machines show promise for reducing the size, surface area footprint, and shielding requirements compared with rotating gantry machines...
March 15, 2017: Medical Physics
https://www.readbyqxmd.com/read/28294204/investigations-on-the-accuracy-of-3d-printed-drill-guides-for-dental-implantology
#6
André Neumeister, Linda Schulz, Christoph Glodecki
This article describes the computer-aided design/computer-aided manufacture (CAD/CAM) accuracy of dental drill guides for application in guided surgery. Today, the availability of three-dimensional (3D) desktop printers allows for the cost-effective production of drill guides by dental laboratories. Our investigations show the accuracy of produced guides by eliminating influencing factors that exist in the guided surgery workflow. To investigate this accuracy, a method was developed to evaluate the CAD/CAM production technology apart from sources of error from cone beam computed tomography (CBCT) scans, intraoral scans, software or human error...
2017: International Journal of Computerized Dentistry
https://www.readbyqxmd.com/read/28290243/motif-discovery-in-speech-application-to-monitoring-alzheimer-s-disease
#7
Peter Garrard, Vanda Nemes, Dragana Nikolic, Anna Barney
BACKGROUND: Perseveration - repetition of words, phrases or questions in speech - is commonly described in Alzheimer's disease (AD). Measuring perseveration is difficult, but may index cognitive performance, aiding diagnosis and disease monitoring. Continuous recording of speech would produce a large quantity of data requiring painstaking manual analysis, and risk violating patients' and others' privacy. A secure record and an automated approach to analysis are required. OBJECTIVES: To record bone-conducted acoustic energy fluctuations from a subject's vocal apparatus using an accelerometer, to describe the recording and analysis stages in detail, and demonstrate that the approach is feasible in AD...
March 9, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/28288104/the-asthma-mobile-health-study-a-large-scale-clinical-observational-study-using-researchkit
#8
Yu-Feng Yvonne Chan, Pei Wang, Linda Rogers, Nicole Tignor, Micol Zweig, Steven G Hershman, Nicholas Genes, Erick R Scott, Eric Krock, Marcus Badgeley, Ron Edgar, Samantha Violante, Rosalind Wright, Charles A Powell, Joel T Dudley, Eric E Schadt
The feasibility of using mobile health applications to conduct observational clinical studies requires rigorous validation. Here, we report initial findings from the Asthma Mobile Health Study, a research study, including recruitment, consent, and enrollment, conducted entirely remotely by smartphone. We achieved secure bidirectional data flow between investigators and 7,593 participants from across the United States, including many with severe asthma. Our platform enabled prospective collection of longitudinal, multidimensional data (e...
March 13, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28287564/feeding-experimentation-device-fed-construction-and-validation-of-an-open-source-device-for-measuring-food-intake-in-rodents
#9
Katrina P Nguyen, Mohamed A Ali, Timothy J O'Neal, Ilona Szczot, Julia A Licholai, Alexxai V Kravitz
Food intake measurements are essential for many research studies. Here, we provide a detailed description of a novel solution for measuring food intake in mice: the Feeding Experimentation Device (FED). FED is an open-source system that was designed to facilitate flexibility in food intake studies. Due to its compact and battery powered design, FED can be placed within standard home cages or other experimental equipment. Food intake measurements can also be synchronized with other equipment in real-time via FED's transistor-transistor logic (TTL) digital output, or in post-acquisition processing as FED timestamps every event with a real-time clock...
February 21, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28287560/modified-microsecure-vitrification-a-safe-simple-and-highly-effective-cryopreservation-procedure-for-human-blastocysts
#10
Mitchel C Schiewe, Shane Zozula, Nancy Nugent, Kelley Waggoner, Jessica Borba, Lisa Gamboa, John B Whitney
Clinical embryo vitrification evolved with the development of unique vitrification devices in the 21(st) century and with the misconception that ultra-rapid cooling in an "open" system (i.e., direct LN2 contact) was a necessity to optimize vitrification success. The dogma surrounding the importance of cooling rates led to unsafe practices subject to technical variation and to the creation of vitrification devices that disregarded important quality-control factors (e.g., ease of use, repeatability, reliability, labeling security, and storage safety)...
March 2, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28286761/developing-an-app-by-exploiting-web-based-mobile-technology-to-inspect-controlled-substances-in-patient-care-units
#11
Ying-Hao Lu, Li-Yao Lee, Ying-Lan Chen, Hsing-I Cheng, Wen-Tsung Tsai, Chen-Chun Kuo, Chung-Yu Chen, Yaw-Bin Huang
We selected iOS in this study as the App operation system, Objective-C as the programming language, and Oracle as the database to develop an App to inspect controlled substances in patient care units. Using a web-enabled smartphone, pharmacist inspection can be performed on site and the inspection result can be directly recorded into HIS through the Internet, so human error of data translation can be minimized and the work efficiency and data processing can be improved. This system not only is fast and convenient compared to the conventional paperwork, but also provides data security and accuracy...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28274751/predictors-of-early-aortic-neck-dilatation-after-endovascular-aneurysm-repair-with-endoanchors
#12
Apostolos K Tassiopoulos, Spyridon Monastiriotis, William D Jordan, Bart E Muhs, Kenneth Ouriel, Jean Paul De Vries
OBJECTIVE: Dilatation of the aorta within the proximal neck after endovascular aneurysm repair (EVAR) can be associated with late endoleaks and migration. This study was designed to identify predictors of early neck dilation in patients undergoing EVAR with Heli-FX EndoAnchors (Medtronic, Santa Rosa, Calif) measured perioperatively to 1 year at different longitudinal levels of neck length. METHODS: The study group of Aneurysm Treatment Using the Heli-FX Aortic Securement System (ANCHOR) comprises 257 consecutive patients prospectively enrolled between April 2012 and September 2014 undergoing EVAR with Heli-FX EndoAnchor implantation at 38 investigational sites...
March 5, 2017: Journal of Vascular Surgery
https://www.readbyqxmd.com/read/28270000/retrograde-semi-retrieval-technique-for-combined-stentriever-plus-aspiration-thrombectomy-in-acute-ischemic-stroke
#13
Ming Wei, Zhiqiang Wei, Xin Li, Hong Li
The endovascular treatment of acute ischemic stroke has become a standard procedure. The combination of multiple neuroendovascular devices provides more possibilities for the improvement of the thrombectomy technique. We describe a modified retrieval technique using a distal intracranial catheter (DIC) for the semi-retrieval of stentriever during the thrombectomy procedure. The retrograde semi-retrieval technique involves completely unfolding the stent retriever by pulling a Navien catheter and the partial re-sheath of a retrievable stent forming a tapered configuration by pushing the Navien catheter, which results in the thrombi being embedded into the strut, securing the clot within the stent and there being a shorter distance for the clot to travel...
January 1, 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28269616/cluster-based-architecture-and-network-maintenance-protocol-for-medical-priority-aware-cognitive-radio-based-hospital
#14
Ishtiak Al Mamoon, A K M Muzahidul Islam, Sabariah Baharun, Ashir Ahmed, Shozo Komaki
Due to the rapid growth of wireless medical devices in near future, wireless healthcare services may face some inescapable issue such as medical spectrum scarcity, electromagnetic interference (EMI), bandwidth constraint, security and finally medical data communication model. To mitigate these issues, cognitive radio (CR) or opportunistic radio network enabled wireless technology is suitable for the upcoming wireless healthcare system. The up-to-date research on CR based healthcare has exposed some developments on EMI and spectrum problems...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269258/biomems-based-coding-for-secure-medical-diagnostic-devices
#15
Tuan Le, Gabriel Salles-Loustau, Laleh Najafizadeh, Mehdi Javanmard, Saman Zonouz
Trustworthy and usable point-of-care solutions require not only effective disease diagnostic procedures to ensure delivery of rapid and accurate outcomes, but also lightweight privacy-preserving capabilities. In this paper, we present a Biomedical Microelectromachanical System (BioMEMS)-based sensor for portable, inexpensive smartphone-based biomarker detection. The biosensor presented here provides the ability for signal encryption at the physical sensor level to ensure patient's diagnostic confidentiality...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269129/a-view-invariant-gait-cycle-segmentation-for-ambient-monitoring
#16
Hao Wu, Beilei Xu, Himanshu Madhu, Jing Zhou
Gait analysis has many clinical applications in disease detection and treatment evaluation. Gait cycle segmentation is a critical component in gait analysis for timing the gait phases in evaluating many movement disorders. Computer vision techniques have been widely used in surveillance for security monitoring. They are nonintrusive and do not require cooperation from subjects. In this paper, we propose to leverage the videos from existing surveillance monitoring systems to provide long-term and ambient assessments of gait patterns from subjects' daily activity without the requirement of wearing a device...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268858/method-for-seamless-unlock-function-for-mobile-applications
#17
Ihor Vasyltsov, Changgyu Bak
In this paper there is proposed an approach for seamless unlock security function for mobile application. The method combines the biomedical signals measured from human body and motion signals acquired from the devices. For this purpose a wearable device and a mobile device can be securely synchronized. It is shown that entropy extracted from biomedical ECG signal is comparable to the strength of the PIN-code security, the same time giving the easiness, flexibility, and seamlessness of the usage to the user...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268840/secure-access-to-patient-s-health-records-using-speechxrays-a-mutli-channel-biometrics-platform-for-user-authentication
#18
Emmanouil G Spanakis, Marios Spanakis, Apostolos Karantanas, Kostas Marias
The most commonly used method for user authentication in ICT services or systems is the application of identification tools such as passwords or personal identification numbers (PINs). The rapid development in ICT technology regarding smart devices (laptops, tablets and smartphones) has allowed also the advance of hardware components that capture several biometric traits such as fingerprints and voice. These components are aiming among others to overcome weaknesses and flaws of password usage under the prism of improved user authentication with higher level of security, privacy and usability...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268382/portable-electrocardiogram-device-using-android-smartphone
#19
S G E Brucal, G K D Clamor, L A O Pasiliao, J P F Soriano, L P M Varilla
Portable electrocardiogram (ECG) capturing device can be interfaced to a smart phone installed with an android-based application (app). This app processes and analyses the data sent by the device to provide an interpretation of the patient/user's heart current condition (e.g.: beats per minute, heart signal waveform, R-R interval). The ECG recorded by the app is stored in the smart phone's Secure Digital (SD) card and cloud storage which can be accessed remotely by a physician to aid in providing medical diagnosis...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28264792/enhancing-mhealth-technology-in-the-patient-centered-medical-home-environment-to-activate-patients-with-type-2-diabetes-a-multisite-feasibility-study-protocol
#20
Ronald Gimbel, Lu Shi, Joel E Williams, Cheryl J Dye, Liwei Chen, Paul Crawford, Eric A Shry, Sarah F Griffin, Karyn O Jones, Windsor W Sherrill, Khoa Truong, Jeanette R Little, Karen W Edwards, Marie Hing, Jennie B Moss
BACKGROUND: The potential of mHealth technologies in the care of patients with diabetes and other chronic conditions has captured the attention of clinicians and researchers. Efforts to date have incorporated a variety of tools and techniques, including Web-based portals, short message service (SMS) text messaging, remote collection of biometric data, electronic coaching, electronic-based health education, secure email communication between visits, and electronic collection of lifestyle and quality-of-life surveys...
March 6, 2017: JMIR Research Protocols
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