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https://www.readbyqxmd.com/read/29149420/blood-clearance-and-occupational-exposure-for-177-lu-dotatate-compared-to-177-lu-psma-radionuclide-therapy
#1
Mohammad Abuqbeitah, Mustafa Demir, Lebriz Uslu-Beşli, Nami Yeyin, Kerim Sönmezoğlu
The main target of this work is to examine blood clearance and external exposure for (177)Lu-DOTATATE compared with new emerging (177)Lu-PSMA therapy. Blood clearance and radiation exposure of 31 patients treated with 5.5 ± 1.1 GBq (177)Lu-DOTATATE were compared to those of 23 patients treated with 7.4 GBq (177)Lu-PSMA. Dose rates were measured at several distances and time points up to 120 h after treatment. Blood samples were collected conjunctively after infusion. Caregiver's cumulative dose was measured by means of an OSL (optically stimulated luminescence) dosimeter for 4-5 days and medical staff's dose was also estimated using electronic personal dosimeters...
November 17, 2017: Radiation and Environmental Biophysics
https://www.readbyqxmd.com/read/29148578/in-order-to-function-more-fully-as-professionals-and-provide-professional-services-medical-physicists-should-actively-seek-to-be-employed-by-physician-groups-rather-than-by-facilities
#2
David W Jordan, DanielC Pavord, Colin G Orton
Most medical physicists in clinical practice in the United States are employed by hospitals. However, a minority are employed by physician groups, and some believe that this is preferable. This is the claim debated in this month's Point/Counterpoint. This article is protected by copyright. All rights reserved.
November 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/29143458/comp-report-cqpr-technical-quality-control-guidelines-for-ct-simulators
#3
Philippe Després, Stewart Gaede
The Canadian Organization of Medical Physicists (COMP), in close partnership with the Canadian Partnership for Quality Radiotherapy (CPQR) has developed a series of Technical Quality Control (TQC) guidelines for radiation treatment equipment. These guidelines outline the performance objectives that equipment should meet in order to ensure an acceptable level of radiation treatment quality. The TQC guidelines have been rigorously reviewed and field tested in a variety of Canadian radiation treatment facilities...
November 16, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29136248/determination-of-national-diagnostic-reference-levels-in-computed-tomography-examinations-of-iran-by-a-new-quality-control-based-dose-survey-method
#4
Mehdi Sohrabi, Masoumeh Parsi, Fereidoun Mianji
National diagnostic reference levels (NDRLs) of Iran were determined for the four most common CT examinations including head, sinus, chest and abdomen/pelvis. A new 'quality control (QC)-based dose survey method', as developed by us, was applied to 157 CT scanners in Iran (2014-15) with different slice classes, models and geographic spread across the country. The NDRLs for head, sinus, chest and abdomen/pelvis examinations are 58, 29, 12 and 14 mGy for CTDIVol and 750, 300, 300 and 650 mGy.cm for DLP, respectively...
November 10, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29135537/status-and-perception-of-risk-management-in-radiation-therapy-survey-among-korean-medical-physicists
#5
Sohyun Ahn, Dong Oh Shin, Sang Hyoun Choi, Jihye Koo, Soon Sung Lee, Dong-Wook Park, Yoon-Jin Oh, Sohyun Park, Dong Wook Kim
This study was conducted as part of an endeavor to improve the risk management system of radiation therapy departments in the Republic of Korea. An online survey on the status and perception of Korea's medical physicists on risk management in radiation therapy was carried out. A total of 40 domestic radiation oncology departments participated. This survey is divided into three categories: (1) work environment; (2) risk management status; and (3) opinions on how to improve risk management. Based on the results of the survey, the conclusions that can be derived are (1) the majority of respondents have a high interest in the risk management of radiation therapy; (2) the lack of staffing is one cause of risk management difficulties; (3) a risk-related terminology and classification system at the national or professional association level are required; (4) each hospital should create a voluntary reporting system for the handling of incidents; (5) medical physicists should establish incident reporting, analysis and countermeasures; and (6) government should develop education and training programs...
November 10, 2017: Health Physics
https://www.readbyqxmd.com/read/29105791/implementation-of-dosimetry-equipment-and-phantoms-at-the-medaustron-light-ion-beam-therapy-facility
#6
Loϊc Grevillot, Markus Stock, Hugo Palmans, Jhonnatan Osorio Moreno, Virgile Letellier, Ralf Dreindl, Alessio Elia, Hermann Fuchs, Antonio Carlino, Stanislav Vatnitsky
PURPOSE: To describe the implementation of dosimetry equipment and phantoms into clinical practice of light ion beam therapy facilities. This work covers standard dosimetry equipment such as computerized water scanners, films, 2D-array, thimble and plane parallel ionization chambers, but also dosimetry equipment specifically devoted to the pencil beam scanning delivery technique such as water columns, scintillating screens or multi-layer ionization chambers. METHOD: Advanced acceptance testing procedures developed at MedAustron and complementary to the standard acceptance procedures proposed by the manufacturer are presented...
November 4, 2017: Medical Physics
https://www.readbyqxmd.com/read/29104659/estimation-of-effective-doses-in-pediatric-x-ray-computed-tomography-examination
#7
Hideki Obara, Midori Takahashi, Kazuya Kudou, Yasushi Mariya, Yoshihiro Takai, Ikuo Kashiwakura
X-ray computed tomography (CT) images are used for diagnostic and therapeutic purposes in various medical disciplines. In Japan, the number of facilities that own diagnostic CT equipment, the number of CT examinations and the number of CT scanners increased by ~1.4-fold between 2005 and 2011. CT operators (medical radiological technologists, medical physicists and physicians) must understand the effective doses for examinations at their own institutions and carefully approach each examination. In addition, the patients undergoing the examination (as well as his/her family) must understand the effective dose of each examination in the context of the cumulative dose...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29091280/changes-and-demands-in-the-higher-education-sector-are-increasingly-making-advanced-degree-medical-physics-programs-non-viable-and-the-profession-will-have-to-develop-a-new-model-for-delivering-such-education
#8
Andrew Fielding, Joann I Prisciandaro, Colin G Orton
At universities, advanced degree programs in Medical Physics tend to have relatively few students compared to, for example, programs in other Physics sub-specialties. This tends to make them relatively more expensive to operate and, since universities are always looking for ways to reduce costs, there is some concern that such programs will cease to be affordable and other ways to educate medical physicists should be developed. This is the premise debated in this month's Point/Counterpoint. This article is protected by copyright...
November 1, 2017: Medical Physics
https://www.readbyqxmd.com/read/29082599/failure-modes-and-effects-analysis-fmea-for-gamma-knife-radiosurgery
#9
Andy Yuanguang Xu, Jagdish Bhatnagar, Greg Bednarz, John Flickinger, Yoshio Arai, Jonet Vacsulka, Wenzheng Feng, Edward Monaco, Ajay Niranjan, L Dade Lunsford, M Saiful Huq
PURPOSE: Gamma Knife radiosurgery is a highly precise and accurate treatment technique for treating brain diseases with low risk of serious error that nevertheless could potentially be reduced. We applied the AAPM Task Group 100 recommended failure modes and effects analysis (FMEA) tool to develop a risk-based quality management program for Gamma Knife radiosurgery. METHODS: A team consisting of medical physicists, radiation oncologists, neurosurgeons, radiation safety officers, nurses, operating room technologists, and schedulers at our institution and an external physicist expert on Gamma Knife was formed for the FMEA study...
October 29, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29077894/radiation-oncology-in-canada
#10
Meredith Giuliani, Mary Gospodarowicz
In this article we provide an overview of the Canadian healthcare system and the cancer care system in Canada as it pertains to the governance, funding and delivery of radiotherapy programmes. We also review the training and practice for radiation oncologists, medical physicists and radiation therapists in Canada. We describe the clinical practice of radiation medicine from patients' referral, assessment, case conferences and the radiotherapy process. Finally, we provide an overview of the practice culture for Radiation Oncology in Canada...
October 25, 2017: Japanese Journal of Clinical Oncology
https://www.readbyqxmd.com/read/29030753/successful-implementation-of-virtual-environment-for-radiotherapy-training-vert-in-medical-physics-education-the-university-of-sydney-s-initial-experience-and-recommendations
#11
Yobelli A Jimenez, Christian Rønn Hansen, Prabhjot Juneja, David I Thwaites
This report outlines the University of Sydney's initial experience with the Virtual Environment for Radiotherapy Training (VERT) system in the Master of Medical Physics program. VERT is a commercially available system, simulating linear accelerators, patient computed tomography (CT) sets, plans and treatment delivery. It was purpose built for radiation therapy (RT) education and offers learners the opportunity to gain knowledge and skills within an interactive, risk-free environment. The integration of VERT into the RT physics module of the Master of Medical Physics program was intended to enhance student knowledge and skills relevant to the curriculum's learning objectives, and to alleviate some of the burden associated with student access to clinical equipment...
October 13, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/28951948/a-comparison-study-of-size-specific-dose-estimate-calculation-methods
#12
Roshni A Parikh, Michael A Wien, Ronald D Novak, David W Jordan, Paul Klahr, Stephanie Soriano, Leslie Ciancibello, Sheila C Berlin
BACKGROUND: The size-specific dose estimate (SSDE) has emerged as an improved metric for use by medical physicists and radiologists for estimating individual patient dose. Several methods of calculating SSDE have been described, ranging from patient thickness or attenuation-based (automated and manual) measurements to weight-based techniques. OBJECTIVE: To compare the accuracy of thickness vs. weight measurement of body size to allow for the calculation of the size-specific dose estimate (SSDE) in pediatric body CT...
September 27, 2017: Pediatric Radiology
https://www.readbyqxmd.com/read/28914233/lessons-from-two-cases-of-radiation-induced-skin-injuries-in-fluoroscopic-procedures-in-bulgaria
#13
Desislava Kostova-Lefterova, Jenia Vassileva, M M Rehani
Radiation-induced injuries to patient skin as a result of fluoroscopy guided interventional procedures are infrequently reported, often misdiagnosed and there is a need to learn lessons from every injury. Methods: This paper describes two cases of radiation induced skin injuries that are, to the best of our knowledge, the first ever reported cases from Bulgaria and possibly from Eastern Europe, and would thus have educational value. Results: The important messages from the skin injuries reported here are: lack of awareness among part of the interventional specialists about the potential for radiation induced skin injury, misdiagnosis after injury happened because of lack of awareness and knowledge among general physicians, dermatologists and surgeons who followed up cases of skin injuries; lack of system to monitor patients with relatively high exposure; important role played by the medical physicist in diagnosing the injury and overall in initiating actions; role of training and informational material displayed in interventional facilities...
September 15, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28895282/a-patient-safety-education-program-in-a-medical-physics-residency
#14
Eric C Ford, Matthew Nyflot, Matthew B Spraker, Gabrielle Kane, Kristi R G Hendrickson
Education in patient safety and quality of care is a requirement for radiation oncology residency programs according to accrediting agencies. However, recent surveys indicate that most programs lack a formal program to support this learning. The aim of this report was to address this gap and share experiences with a structured educational program on quality and safety designed specifically for medical physics therapy residencies. Five key topic areas were identified, drawn from published recommendations on safety and quality...
September 12, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28890091/-what-does-the-medical-physicist-expect-from-the-radiation-oncologist-and-vice-versa
#15
A Lisbona
The cooperation between radiation oncologist and medical physicist is essential to guarantee the quality and safety of the irradiation of our patients. It would be wrong to consider that the intervention of medical physicists in the patient management process is limited to the provision of calibrated and controlled equipment and to guarantee the validity of the dose distribution and the treatment time, while the radiation oncologist has the complete control of all clinical activities related to irradiation...
October 2017: Cancer Radiothérapie: Journal de la Société Française de Radiothérapie Oncologique
https://www.readbyqxmd.com/read/28871987/low-dose-rate-brachytherapy-for-prostate-cancer-in-low-resource-settings
#16
Michelle I Echevarria, Arash O Naghavi, Yazan A Abuodeh, Kamran A Ahmed, Carlos Chevere, Daniel Fernandez, Kosj Yamoah
PURPOSE: In areas with limited health care, it is important to identify and implement effective treatment methods and to optimize available resources. We investigated the implementation of a low-dose-rate (LDR) brachytherapy program for the treatment of prostate cancer (PCa) in a low-resource setting such as Puerto Rico (PR), where PCa is the main cause of cancer-associated death. METHODS AND MATERIALS: After institutional approval, the medical records of patients with nonmetastatic PCa undergoing LDR brachytherapy from 2008 to 2013 were reviewed from PR...
October 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28862765/an-fmea-evaluation-of-intensity-modulated-radiation-therapy-dose-delivery-failures-at-tolerance-criteria-levels
#17
Jacqueline Tonigan Faught, Peter A Balter, Jennifer L Johnson, Stephen F Kry, Laurence E Court, Francesco C Stingo, David S Followill
PURPOSE: The objective of this work was to assess both the perception of failure modes in Intensity Modulated Radiation Therapy (IMRT) when the linac is operated at the edge of tolerances given in AAPM TG-40 (Kutcher et al.) and TG-142 (Klein et al.) as well as the application of FMEA to this specific section of the IMRT process. METHODS: An online survey was distributed to approximately 2000 physicists worldwide that participate in quality services provided by the Imaging and Radiation Oncology Core - Houston (IROC-H)...
September 1, 2017: Medical Physics
https://www.readbyqxmd.com/read/28836506/unintended-and-accidental-medical-radiation-exposures-in-radiology-guidelines-on-investigation-and-prevention
#18
Colin J Martin, J Vassileva, Eliseo Vano, M Mahesh, Steve Ebdon-Jackson, K Ng, Donald P Frush, R Loose, John Damilakis
This paper sets out guidelines for managing radiation exposure incidents involving patients in diagnostic and interventional radiology. The work is based on collation of experiences from representatives of international and national organizations for radiologists, medical physicists, radiographers, regulators, and equipment manufacturers, derived from an International Atomic Energy Agency Technical Meeting. More serious overexposures can result in skin doses high enough to produce tissue reactions, in interventional procedures and computed tomography, most notably from perfusion studies...
August 24, 2017: Journal of Radiological Protection: Official Journal of the Society for Radiological Protection
https://www.readbyqxmd.com/read/28834551/risk-assessment-of-a-new-acceptance-testing-procedure-for-conventional-linear-accelerators
#19
Taylor Harry, Sridhar Yaddanapudi, Bin Cai, Keith Stinson, S Murty Goddu, Camille Noel, Sasa Mutic, Todd Pawlicki
PURPOSE: New techniques and materials have recently been developed to expedite the conventional linac acceptance testing procedure (Med Phys. 2017;22), which use the electronic portal imaging device (EPID) for data collection. This new procedure is designed to be more efficient and robust than the conventional approach. The purpose of this work was to perform a comparative risk assessment of the two acceptance testing procedures (ATPs). MATERIALS AND METHODS: Failure Modes and Effects Analysis was used to assess risks for both ATP approaches...
August 23, 2017: Medical Physics
https://www.readbyqxmd.com/read/28827007/failure-modes-and-effects-analysis-for-ocular-brachytherapy
#20
Yongsook C Lee, Yongbok Kim, Jason Wei-Yeong Huynh, Russell J Hamilton
PURPOSE: The aim of the study was to identify potential failure modes (FMs) having a high risk and to improve our current quality management (QM) program in Collaborative Ocular Melanoma Study (COMS) ocular brachytherapy by undertaking a failure modes and effects analysis (FMEA) and a fault tree analysis (FTA). METHODS AND MATERIALS: Process mapping and FMEA were performed for COMS ocular brachytherapy. For all FMs identified in FMEA, risk priority numbers (RPNs) were determined by assigning and multiplying occurrence, severity, and lack of detectability values, each ranging from 1 to 10...
August 18, 2017: Brachytherapy
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