keyword
MENU ▼
Read by QxMD icon Read
search

Physicist

keyword
https://www.readbyqxmd.com/read/28298965/radiology-education-in-europe-analysis-of-results-from-22-european-countries
#1
Bhavya Rehani, Yi C Zhang, Madan M Rehani, András Palkó, Lawrence Lau, Miriam N Mikhail Lette, William P Dillon
AIM: To assess the state of radiology education across Europe by means of a survey study. METHODS: A comprehensive 23-item radiology survey was distributed via email to the International Society of Radiology members, national radiological societies, radiologists and medical physicists. Reminders to complete the survey were sent and the results were analyzed over a period of 4 mo (January-April 2016). Survey questions include length of medical school and residency training; availability of fellowship and subspecialty training; number of residency programs in each country; accreditation pathways; research training; and medical physics education...
February 28, 2017: World Journal of Radiology
https://www.readbyqxmd.com/read/28297451/radshield-semiautomated-shielding-design-using-a-floor-plan-driven-graphical-user-interface
#2
Matthew C DeLorenzo, Dee H Wu, Kai Yang, Isaac B Rutel
The purpose of this study was to introduce and describe the development of RadShield, a Java-based graphical user interface (GUI), which provides a base design that uniquely performs thorough, spatially distributed calculations at many points and reports the maximum air-kerma rate and barrier thickness for each barrier pursuant to NCRP Report 147 methodology. Semiautomated shielding design calculations are validated by two approaches: a geometry-based approach and a manual approach. A series of geometry-based equations were derived giving the maximum air-kerma rate magnitude and location through a first derivative root finding approach...
September 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28297349/effect-of-fluoroscopic-x-ray-beam-spectrum-on-air-kerma-measurement-accuracy-implications-for-establishing-correction-coefficients-on-interventional-fluoroscopes-with-kap-meters
#3
Kevin A Wunderle, Joseph T Rakowski, Frank F Dong
The first goal of this study was to investigate the accuracy of the displayed reference plane air kerma (Ka,r) or air kerma-area product (Pk,a) over a broad spectrum of X-ray beam qualities on clinically used interventional fluoroscopes incorporating air kerma-area product meters (KAP meters) to measure X-ray output. The second goal was to investigate the accuracy of a correction coefficient (CC) determined at a single beam quality and applied to the measured Ka,r over a broad spectrum of beam qualities. Eleven state-of-the-art interventional fluoroscopes were evaluated, consisting of eight Siemens Artis zee and Artis Q systems and three Philips Allura FD systems...
May 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28297345/a-software-tool-to-automatically-assure-and-report-daily-treatment-deliveries-by-a-cobalt-60-radiation-therapy-device
#4
Deshan Yang, H Omar Wooten, Olga Green, Harold H Li, Shi Liu, Xiaoling Li, Vivian Rodriguez, Sasa Mutic, Rojano Kashani
The aims of this study were to develop a method for automatic and immediate verification of treatment delivery after each treatment fraction in order to detect and correct errors, and to develop a comprehensive daily report which includes delivery verification results, daily image-guided radiation therapy (IGRT) review, and information for weekly physics reviews. After systematically analyzing the requirements for treatment delivery verification and understanding the available information from a commercial MRI-guided radiotherapy treatment machine, we designed a procedure to use 1) treatment plan files, 2) delivery log files, and 3) beam output information to verify the accuracy and completeness of each daily treatment delivery...
May 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28297311/treatment-planning-for-metals-using-an-extended-ct-number-scale
#5
John P Mullins, Michael P Grams, Michael G Herman, Debra H Brinkmann, John A Antolak
Metal implants which saturate the CT number scale may require dosimetrist and physicist involvement to manually contour and assign an appropriate value to the metal for accurate dose calculation. This study investigated dose calculation based directly on extended CT scale images for different metals and geometries. The aim was to evaluate extended CT accuracy as a suitable alternative to standard CT methods in the presence of high-Z materials and artifacts, despite the reduced HU resolution of extended CT. Gafchromic film measurements were made for comparison to calculated doses...
November 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28297309/production-review-and-impact-of-technical-quality-control-guidelines-in-a-national-context
#6
Michelle K Nielsen, Kyle E Malkoske, Erika Brown, Kevin Diamond, Normand Frenière, John Grant, Natalie Pomerleau-Dalcourt, Jason Schella, L John Schreiner, Laurent Tantôt, J Eduardo Villarreal-Barajas, Jean-Pierre Bissonnette
A close partnership between the Canadian Partnership for Quality Radiotherapy (CPQR) and the Canadian Organization of Medical Physicist's (COMP) Quality Assurance and Radiation Safety Advisory Committee (QARSAC) has resulted in the development of a suite of Technical Quality Control (TQC) guidelines for radiation treatment equipment; they outline specific performance objectives and criteria that equipment should meet in order to assure an acceptable level of radiation treatment quality. The adopted framework for the development and maintenance of the TQCs ensures the guidelines incorporate input from the medical physics community during development, measures the workload required to perform the QC tests outlined in each TQC, and remain relevant (i...
November 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28297281/a-survey-on-table-tolerances-and-couch-overrides-in-radiotherapy
#7
Bonnie Chinsky, Rakesh Patel, Joshua Panfil, Murat Surucu, John C Roeske
The purpose of this study was to survey current departmental policies on treatment couch overrides and the values of table tolerances used clinically. A 25-question electronic survey on couch overrides and tolerances was sent to full members of the American Association of Physicists in Medicine (AAPM). The first part of the survey asked participants if table overrides were allowed at their institution, who was allowed to perform these overrides, and if imaging was required with overrides. The second part of the survey asked individuals to provide table tolerance data for the following treatment sites: brain/head and neck (H&N), lung, breast, abdomen/pelvis and prostate...
November 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28296332/monte-carlo-calculations-and-experimental-measurements-of-the-tg-43u1-recommended-dosimetric-parameters-of-125-i-model-ir-seed2-brachytherapy-source
#8
Sahar Sheikholeslami, Hassan Ali Nedaie, Mahdi Sadeghi, Hosein Pourbeigy, Sohrab Shahzadi, Mehdi Zehtabian, Mohsen Hasani, Ali S Meigooni
A new design of I125 (Model IR-Seed2) brachytherapy source has been manufactured recently at the Applied Radiation Research School, Nuclear Science and Technology Research Institute in Iran. The source consists of six resin beads (0.5 mm diameter) that are sealed in a cylindrical titanium capsule of 0.7 mm internal and 0.8 mm external diameters. This work aims to evaluate the dosimetric parameters of the newly designed I125 source using experimental measurements and Monte Carlo (MC) simulations. Dosimetric characteristics (dose rate constant, radial dose function, and 2D and 1D anisotropy functions) of the IR-Seed2 were determined using experimental measurements and MC simulations following the recommendations by the Task Group 43 (TG-43U1) report of the American Association of Physicists in Medicine (AAPM)...
July 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28296325/a-report-from-the-aapm-subcommittee-on-guidelines-for-competency-evaluation-for-clinical-medical-physicists-in-radiation-oncology
#9
Daniel C Pavord, Steven Birnbaum, Douglas Boccuzzi, Steven deBoer, D Jay Freedman, Michael Schell, Steven Sutlief
The goal of this report is to provide a framework from which an institution can develop a competency and credentialing program. It is not intended to be adopted as written, but rather as a list of suggestions from which the institution develops their program. A clear distinction should be made between the initial evaluation of the competency of new staff (credentialing) and the ongoing verification of the competency of existing staff. Furthermore, whenever new technologies are implemented, the entire staff would be subject to the credentialing process...
July 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28296301/imaging-acquisition-display-performance-an-evaluation-and-discussion-of-performance-metrics-and-procedures
#10
Michael S Silosky, Rebecca M Marsh, Ann L Scherzinger
When The Joint Commission updated its Requirements for Diagnostic Imaging Services for hospitals and ambulatory care facilities on July 1, 2015, among the new requirements was an annual performance evaluation for acquisition workstation displays. The purpose of this work was to evaluate a large cohort of acquisition displays used in a clinical environment and compare the results with existing performance standards provided by the American College of Radiology (ACR) and the American Association of Physicists in Medicine (AAPM)...
July 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28295388/subjects-such-as-strategic-planning-extra-disciplinary-communication-and-management-have-become-crucial-to-medical-physics-clinical-practice-and-should-become-an-integral-part-of-the-medical-physics-curriculum
#11
Carmel J Caruana, J Adam M Cunha, Colin G Orton
In addition to their clinical duties, many medical physicists find themselves in a situation where they have to do managerial work such as strategic planning and communication within a hospital or with outside agencies. Typically, these skills are obtained on-the-job or by taking extra-curricular courses. However, some believe that such strategic planning and communication and management skills are so important that courses on these topics should become an integral part of the medical physics curriculum. This is the claim debated in this month's Point/Counterpoint...
March 15, 2017: Medical Physics
https://www.readbyqxmd.com/read/28292839/the-physics-of-organoids-a-biophysical-approach-to-understanding-organogenesis
#12
Svend Dahl-Jensen, Anne Grapin-Botton
Organoids representing a diversity of tissues have recently been created, bridging the gap between cell culture and experiments performed in vivo Being small and amenable to continuous monitoring, they offer the opportunity to scrutinize the dynamics of organ development, including the exciting prospect of observing aspects of human embryo development live. From a physicist's perspective, their ability to self-organize - to differentiate and organize cells in space - calls for the identification of the simple rules that underlie this capacity...
March 15, 2017: Development
https://www.readbyqxmd.com/read/28289939/patient-dose-in-interventional-radiology-a-multicentre-study-of-the-most-frequent-procedures-in-france
#13
Cécile Etard, Emeline Bigand, Cécile Salvat, Vincent Vidal, Jean Paul Beregi, Amaury Hornbeck, Joël Greffier
OBJECTIVES: A national retrospective survey on patient doses was performed by the French Society of Medical physicists to assess reference levels (RLs) in interventional radiology as required by the European Directive 2013/59/Euratom. METHODS: Fifteen interventional procedures in neuroradiology, vascular radiology and osteoarticular procedures were analysed. Kerma area product (KAP), fluoroscopy time (FT), reference air kerma and number of images were recorded for 10 to 30 patients per procedure...
March 13, 2017: European Radiology
https://www.readbyqxmd.com/read/28286945/controlled-sol-gel-transitions-by-actuating-molecular-machine-based-supramolecular-polymers
#14
Antoine Goujon, Giacomo Mariani, Thomas Lang, Emilie Moulin, Michel Rawiso, Eric Buhler, Nicolas Giuseppone
The implementation of artificial molecular machines in polymer science is an important objective that challenges chemists and physicists in order to access an entirely new class of smart materials. To design such systems, the amplification of a mechanical actuation from the nanoscale up to a macroscopic response in the bulk material is a central issue. In this article we show that bistable [c2]daisy chain rotaxanes (i.e. molecular muscles) can be linked into main-chain Upy-based supramolecular polymers. We then reveal by an in depth quantitative study that the pH actuation of the mechanically active rotaxane at the nanoscale influences the physical reticulation of the polymer chains by changing the supramolecular behavior of the Upy units...
March 13, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28277012/an-emotional-contribution-to-the-festschrift-of-the-journal-of-biomaterials-science-for-teiji-tsuruta
#15
Helmut Ringsdorf
It is a honor for me to contribute to the 'Festschrift for Teiji Tsuruta'! Being old, it is much easier for me to look back than to think ahead. Thus, please allow me to make a few 'historical remarks' about Biomaterials and Biotechnology, long before Science stepped in. Remarks about Georg Christoph Lichtenberg, the Göttinger physicist and philosopher, and his relation to Teiji Tsuruta. And talking about him as teacher, one cannot do it without looking at Hermann Staudinger and his dreams.
February 13, 2017: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/28269238/social-norms-of-good-design-interdisciplinary-perspectives-from-a-survey-of-engineers-and-clinicians-in-bioengineering
#16
Angela N Johnson
In bioengineering training for new researchers and engineers, a great deal of time is spent discussing what constitutes "good" design. Conceptualization of good design, however, varies widely across interdisciplinary team members, with potential to both foster innovation or lead to unproductive conflict. To explore how groups central to bioengineering teams (physicians/clinicians and engineers/physicists) conceptualize good design, we asked 176 professionals in bioengineering to complete a comprehensive online survey including items designed to assess cognitive and moral foundations (validated MFQ30 tool) and custom items assessing perceptions on good design in three areas (good design characteristics, reputation of design approvers, and perceived design patient/consumer suitability)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28259513/harnessing-neuroimaging-capability-in-pediatric-stroke-proceedings-of-the-stroke-imaging-laboratory-for-children%C3%A2-workshop
#17
REVIEW
Nomazulu Dlamini, Max Wintermark, Heather Fullerton, Stephen Strother, Wayne Lee, Bruce Bjornson, Kristin P Guilliams, Steven Miller, Adam Kirton, Christopher G Filippi, Alexandra Linds, Rand Askalan, Gabrielle deVeber
On June 5, 2015 the International Pediatric Stroke Study and the Stroke Imaging Laboratory for Children cohosted a unique workshop focused on developing neuroimaging research in pediatric stroke. Pediatric neurologists, neuroradiologists, interventional neuroradiologists, physicists, nurse practitioners, neuropsychologists, and imaging research scientists from around the world attended this one-day meeting. Our objectives were to (1) establish a group of experts to collaborate in advancing pediatric neuroimaging for stroke, (2) develop consensus clinical and research magnetic resonance imaging protocols for pediatric stroke patients, and (3) develop imaging-based research strategies in pediatric ischemic stroke...
January 25, 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/28258871/from-a-physicist-s-toy-to-an-indispensable-analytical-tool-in-many-fields-of-science-a-personal-view-of-the-leading-contribution-of-ondrej-krivanek-to-the-spectacular-successes-of-eels-spectroscopy-in-the-electron-microscope
#18
Christian Colliex
This contribution aims at reporting, from the subjective point of view of a witness based in Orsay, the fundamental role of Ondrej Krivanek in the spectacular emergence of EELS (Electron Energy-Loss Spectroscopy) as a key tool in analytical electron microscopy. In this regard, he has successively designed and built while he was at Gatan, serial EELS spectrometers, parallel EELS spectrometers and post-column energy filters which have been fitted to many different (S)TEM columns installed around the world. More recently the implementation of monochromators on the NION dedicated STEM together with the realization and performance of aberration correctors (which lie out of the scope of the present review), have placed the most advanced instrumental tool in the hands of continuously increasing populations of users in many domains of materials science and in life sciences...
November 24, 2016: Ultramicroscopy
https://www.readbyqxmd.com/read/28236175/how-many-physicists-does-it-take-to-test-a-mammography-unit
#19
EDITORIAL
Jennifer Diffey
No abstract text is available yet for this article.
February 24, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/28227472/social-norms-of-good-design-interdisciplinary-perspectives-from-a-survey-of-engineers-and-clinicians-in-bioengineering
#20
Angela N Johnson, Angela N Johnson, Angela N Johnson
In bioengineering training for new researchers and engineers, a great deal of time is spent discussing what constitutes "good" design. Conceptualization of good design, however, varies widely across interdisciplinary team members, with potential to both foster innovation or lead to unproductive conflict. To explore how groups central to bioengineering teams (physicians/clinicians and engineers/physicists) conceptualize good design, we asked 176 professionals in bioengineering to complete a comprehensive online survey including items designed to assess cognitive and moral foundations (validated MFQ30 tool) and custom items assessing perceptions on good design in three areas (good design characteristics, reputation of design approvers, and perceived design patient/consumer suitability)...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
keyword
keyword
47923
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"