keyword
MENU ▼
Read by QxMD icon Read
search

Physicist

keyword
https://www.readbyqxmd.com/read/28110384/compass-systems
#1
Nikita Chernetsov
Three compass systems based on global cues known to exist in migrating birds are reviewed. Two of these systems are based on celestial cues, a time-dependent sun compass and time-independent, i.e. not involving the internal clock, star compass. The third system is the magnetic compass, based on a separate sensory modality, which currently attracts much attention from behavioural ecologists, physiologists and physicists. The complex pattern of hierarchy and interactions between these compass systems is briefly discussed...
January 21, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28109632/the-american-college-of-radiology-and-the-american-brachytherapy-society-practice-parameter-for-transperineal-permanent-brachytherapy-of-prostate-cancer
#2
Nathan H J Bittner, Peter F Orio, Gregory S Merrick, Bradley R Prestidge, Alan Charles Hartford, Seth A Rosenthal
Transperineal permanent brachytherapy is a safe and effective treatment option for patients with organ-confined prostate cancer. Careful adherence to established brachytherapy standards has been shown to improve the likelihood of procedural success and reduce the incidence of treatment-related morbidity. A collaborative effort of the American College of Radiology (ACR) and the American Brachytherapy Society (ABS) has produced practice parameters for LDR prostate brachytherapy. These practice parameters define the qualifications and responsibilities of all the involved personnel, including the radiation oncologist, physicist and dosimetrist...
January 2017: Brachytherapy
https://www.readbyqxmd.com/read/28105712/american-association-of-physicists-in-medicine-1631-prince-street-alexandria-va-22314-usa
#3
(no author information available yet)
No abstract text is available yet for this article.
October 2016: Medical Physics
https://www.readbyqxmd.com/read/28076938/transmission-electron-microscopy-for-nanomedicine-novel-applications-for-long-established-techniques
#4
Manuela Malatesta
During the last twenty years, the research in nanoscience and nanotechnology has dramatically increased and, in the last decade, the interest has progressively been oriented towards biomedical applications, giving rise to a new field termed nanomedicine. Transmis - sion electron microscopy is a valuable technique not only for the thorough physico-chemical characterization of newly synthesized nanoparticulates, but especially to explore the effects of nanocomposites on biological systems, providing essential information for the development of efficient therapeutic and diagnostic strategies...
December 9, 2016: European Journal of Histochemistry: EJH
https://www.readbyqxmd.com/read/28074545/development-and-testing-of-a-database-of-nih-research-funding-of-aapm-members-a-report-from-aapm-working-group-for-the-development-of-a-research-database-wgdrd
#5
Brendan Whelan, Eduardo Moros, Rebecca Fahrig, James Deye, Thomas Yi, Michael Woodward, Paul Keall, Jeff Siewerdsen
PURPOSE: To produce and maintain a database of National Institutes of Health (NIH) funding of American Association of Physicists in Medicine (AAPM) members, to perform a top level analysis of this data, and to make this data (hereafter referred to as the AAPM research database) available for the use of the AAPM and its members. METHODS: NIH funded research dating back to 1985 is available for public download through the NIH exporter website, and AAPM membership information dating back to 2002 was supplied by the AAPM...
January 11, 2017: Medical Physics
https://www.readbyqxmd.com/read/28067975/assessment-of-acute-thermal-damage-volumes-in-muscle-using-magnetization-prepared-3d-t2-weighted-imaging-following-mri-guided-high-intensity-focused-ultrasound-therapy
#6
Robert M Staruch, Joris Nofiele, Jamie Walker, Chenchen Bing, Ananth J Madhuranthakam, April Bailey, Young-Sun Kim, Avneesh Chhabra, Dennis Burns, Rajiv Chopra
PURPOSE: To evaluate magnetization-prepared 3D T2 -weighted magnetic resonance imaging (MRI) measurements of acute tissue changes produced during ablative MR high-intensity focused ultrasound (MR-HIFU) exposures. MATERIALS AND METHODS: A clinical MR-HIFU system (3T) was used to generate thermal lesions (nā€‰=ā€‰24) in the skeletal muscles of three pigs. T1 -weighted, 2D T2 -weighted, and magnetization-prepared 3D T2 -weighted sequences were acquired before and after therapy to evaluate tissue changes following ablation...
January 9, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28060423/famous-medical-physicists-often-get-more-credit-for-discoveries-due-to-their-fame-than-less-prominent-scientists-who-may-have-contributed-as-much-or-earlier-to-these-developments
#7
Clive Baldock, L John Schreiner, Colin G Orton
Medical physics is a rapidly developing, technologically dependent, field. New discoveries are being made almost daily, as demonstrated by papers in this and other similar journals. Many of the authors are early in their careers. Some are concerned, however, that more famous medical physicists often get credit for discoveries due to their fame rather than less prominent scientists who may have, in fact, contributed more to the development in question. This is the claim debated in this month's Point/Counterpoint...
January 6, 2017: Medical Physics
https://www.readbyqxmd.com/read/28048913/mo-de-bra-02-simac-a-simulation-tool-for-teaching-linear-accelerator-physics
#8
M Carlone, N Harnett, W Harris, B Norrlinger, M MacPherson, M Lamey, R Anderson, M Oldham
PURPOSE: The first goal of this work is to develop software that can simulate the physics of linear accelerators (linac). The second goal is to show that this simulation tool is effective in teaching linac physics to medical physicists and linac service engineers. METHODS: Linacs were modeled using analytical expressions that can correctly describe the physical response of a linac to parameter changes in real time. These expressions were programmed with a graphical user interface in order to produce an environment similar to that of linac service mode...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048892/su-f-j-116-clinical-experience-based-verification-and-improvement-of-a-4dct-program
#9
P Fogg, M West, T Aland
PURPOSE: To demonstrate the role of continuous improvement fulfilled by the Medical Physicist in clinical 4DCT and CBCT scanning. METHODS: Lung (SABR and Standard) patients' 4D respiratory motion and image data were reviewed over a 3, 6 and 12 month period following commissioning testing. By identifying trends of clinically relevant parameters and respiratory motions, variables were tested with a programmable motion phantom and assessed. Patient traces were imported to a motion phantom and 4DCT and CBCT imaging were performed...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048891/th-e-209-00-radiation-dose-monitoring-and-protocol-management
#10
Matthew Palmer
: Radiation dose monitoring solutions have opened up new opportunities for medical physicists to be more involved in modern clinical radiology practices. In particular, with the help of comprehensive radiation dose data, data-driven protocol management and informed case follow up are now feasible. Significant challenges remain however and the problems faced by medical physicists are highly heterogeneous. Imaging systems from multiple vendors and a wide range of vintages co-exist in the same department and employ data communication protocols that are not fully standardized or implemented making harmonization complex...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048890/su-g-tep1-05-development-and-clinical-introduction-of-automated-radiotherapy-treatment-planning-for-prostate-cancer
#11
D Winkel, G H Bol, B van Asselen, J Hes, V Scholten, Lgw Kerkmeijer, B W Raaymakers
PURPOSE: To develop an automated radiotherapy treatment planning and optimization workflow for prostate cancer in order to generate clinical treatment plans. METHODS: A fully automated radiotherapy treatment planning and optimization workflow was developed based on the treatment planning system Monaco (Elekta AB, Stockholm, Sweden). To evaluate our method, a retrospective planning study (n=100) was performed on patients treated for prostate cancer with 5 field intensity modulated radiotherapy, receiving a dose of 35Ɨ2Gy to the prostate and vesicles and a simultaneous integrated boost of 35Ɨ0...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048885/mo-d-brb-03-quality-assurance-of-sbrt
#12
J Roper
: Increased use of SBRT and hypofractionation in radiation oncology practice has posted a number of challenges to medical physicist, ranging from planning, image-guided patient setup and on-treatment monitoring, to quality assurance (QA) and dose delivery. This symposium is designed to provide current knowledge necessary for the safe and efficient implementation of SBRT in various linac platforms, including the emerging digital linacs equipped with high dose rate FFF beams. Issues related to 4D CT, PET and MRI simulations, 3D/4D CBCT guided patient setup, real-time image guidance during SBRT dose delivery using gated/un-gated VMAT/IMRT, and technical advancements in QA of SBRT (in particular, strategies dealing with high dose rate FFF beams) will be addressed...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048871/mo-f-204-00-preparing-for-the-abr-diagnostic-and-nuclear-medical-physics-exams
#13
Nicholas Bevins
: Adequate, efficient preparation for the ABR Diagnostic and Nuclear Medical Physics exams is key to successfully obtain ABR certification. Each part of the ABR exam presents its own challenges: Part I: Determine the scope of basic medical physics study material, efficiently review this material, and solve related written questions/problems. Part II: Understand imaging principles, modalities, and systems, including image acquisition, processing, and display. Understand the relationship between imaging techniques, image quality, patient dose and safety, and solve related written questions/problems...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048845/mo-d-pins-room-hall-e-01-integrating-mr-into-radiation-therapy
#14
D Savitskij
MRI, with its excellent soft tissue contrast and its ability to provide physiological as well as anatomical information, is becoming increasingly used in radiation therapy for treatment planning, image-guided radiation therapy, and treatment evaluation. This session will explore solutions to integrating MRI into the simulation process. Obstacles for using MRI for simulation include distortions and artifacts, image acquisition speed, complexity of imaging techniques, and lack of electron density information...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048832/su-f-p-43-use-of-freeware-business-intelligence-software-to-trend-tg-142-compliant-linac-qa-parameters
#15
A Ayan, D DiCostanzo, J Woollard, N Gupta
PURPOSE: To develop a software platform to track linac QA parameter trends using readily available freeware business intelligence (BI) software METHODS: Spreadsheets were used to collect QA data by many, if not all, institutions; but the trending analysis with data from separate spreadsheets could be a cumbersome task. A freeware version of the Microsoft Power BI software was adapted to trend linac QA parameters to allow us to maintain nine dosimetrically equivalent linacs. A monthly QA spreadsheet (Microsoft Excel) has been used in our institution to collect QA data...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048827/su-f-t-163-improve-proton-therapy-efficiency-report-of-a-workshop
#16
Y Zheng, J Flanz, D Mah, M Pankuch, C Beltran, B Robison, B Kreydick, A Schreuder
PURPOSE: The technology of proton therapy, especially the pencil beam scanning technique, is evolving very quickly. However, the efficiency of proton therapy seems to lag behind conventional photon therapy. The purpose of the abstract is to report on the findings of a workshop on improvement of QA, planning and treatment efficiency in proton therapy. METHODS: A panel of physicists, clinicians, and vendor representatives from over 18 institutions in the United States and internationally were convened in Knoxville, Tennessee in November, 2015...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048826/su-f-p-03-management-of-time-to-treatment-inititation-case-for-an-electronic-whiteboard
#17
N Adnani
PURPOSE: To determine if data mining of an electronic whiteboard improves the management of the Time to Treatment Initiation (TTI) in radiation oncology. METHODS: An electronic whiteboard designed to help in managing the planning workflow and improves communication regarding patient planning progress was used to record the dates at which each phase of the planning process began or completed. These are CT Sim date, Plan Start, Physician Review, Physicist Review, Approval for Treatment Delivery, Setup or Verification of Simulation...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048799/mo-f-201-02-panel-member
#18
L Padilla
: The goal of this session is to provide guidance to medical physicists undergoing the American Board of Radiology certification process in therapeutic medical physics. This panel discussion will focus on parts 2 (computer-based) and 3 (oral) of the examination. Unlike the latter portions of the exam which are specialty-driven, part 1 is universal for all medical physics fields and will not be addressed. This session is structured into different topics that aim to guide the participants on how to successfully prepare for the board exams...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048796/mo-fg-campus-jep2-04-comparison-study-for-ct-and-mr-only-prostate-imrt-treatment-planning-a-framework-for-the-estimation-of-relative-contribution-of-body-contour-discrepancies-tissue-stratification-and-hu-red-conversion-to-the-overall-dose-difference
#19
M Maspero, P R Seevinck, G Schubert, M Hoesl, G J Meijer, M A Viergever, Jjw Lagendijk, Cat van den Berg
PURPOSE: To compare dose of prostate IMRT plans on CT vs MR-based pseudo-CT (pCT). A framework is demonstrated to isolate various confounding factors causing dose differences. This approach will be valuable for medical physicists interested in commissioning strategy of MR-only dose planning. METHODS: A retrospective study was conducted on fourteen prostate patients that underwent CT and MRI scans. MR was equipped with an in-house-developed flat table-top and coil support...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048756/su-f-j-66-anatomy-deformation-based-comparison-between-one-step-and-two-step-optimization-for-online-art
#20
Z Feng, G Yu, S Qin, C Ma, J Zhu, Y Yin, D Li
PURPOSE: This study investigated that how the quality of adapted plan was affected by inter-fractional anatomy deformation by using one-step and two-step optimization for on line adaptive radiotherapy (ART) procedure. METHODS: 10 lung carcinoma patients were chosen randomly to produce IMRT plan by one-step and two-step algorithms respectively, and the prescribed dose was set as 60 Gy on the planning target volume (PTV) for all patients. To simulate inter-fractional target deformation, four specific cases were created by systematic anatomy variation; including target superior shift 0...
June 2016: Medical Physics
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"