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Radiation safety

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https://www.readbyqxmd.com/read/28086942/external-beam-radiotherapy-for-unresectable-hepatocellular-carcinoma-an-international-multicenter-phase-i-trial-sakk-77-07-and-sasl-26
#1
Evelyn Herrmann, Diana Naehrig, Manfred Sassowsky, Martin Bigler, Jeroen Buijsen, Ilja Ciernik, Daniel Zwahlen, Alessandra Franzetti Pellanda, Andreas Meister, Peter Brauchli, Simona Berardi, Erika Kuettel, Jean-François Dufour, Daniel M Aebersold
PURPOSE: To assess feasibility and safety of conventionally fractionated radiotherapy (cfRT) in patients with hepatocellular carcinoma (HCC). METHODS: Patients with histologically confirmed stage cT1-4, cN0-1 HCC and Child-Pugh Score (CPS) A or B disease were included in a phase I multicenter trial. Metastatic HCC were allowed if ≥90% of total tumor volume was located within the liver. Patients were enrolled onto five dose-escalation levels (54-70Gy in 2Gy fractions) based on a modified 3 + 3 design, with cohorts of five patients instead of three patients in dose levels 4 and 5...
January 13, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28072927/artificial-induction-of-native-aquaporin-1-expression-in-human-salivary-cells
#2
Z Wang, S Pradhan-Bhatt, M C Farach-Carson, M J Passineau
Gene therapy for dry mouth disorders has transitioned in recent years from theoretical to clinical proof of principle with the publication of a first-in-man phase I/II dose escalation clinical trial in patients with radiation-induced xerostomia. This trial used a prototype adenoviral vector to express aquaporin-1 (AQP1), presumably in the ductal cell layer and/or in surviving acinar cells, to drive transcellular flux of interstitial fluid into the labyrinth of the salivary duct. As the development of this promising gene therapy continues, safety considerations are a high priority, particularly those that remove nonhuman agents (i...
January 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28071007/evaluation-the-effect-of-gamma-irradiation-on-microbial-chemical-and-sensorial-properties-of-peanut-arachis-hypogaea-l-seeds
#3
Mahfouz Al-Bachir
BACKGROUND: The aim of the present study was to evaluate the possibility to apply gamma radiation treatment for decontaminating and assuring the quality of peanut seeds. METHODS: The radiation processing was carried out at dose levels of 3, 6 and 9 kGy. The irradiated and non-irradiated (control) samples were stored at room temperature for 12 months, and analyzed for microbial load, proximate composition, sensorial acceptance and chemical properties. RESULTS: The results indicated that gamma irradiation treatment significantly (p < 0...
April 2016: Acta Scientiarum Polonorum. Technologia Alimentaria
https://www.readbyqxmd.com/read/28068239/stereotactic-body-radiation-therapy-for-locally-advanced-pancreatic-cancer-a-systematic-review-and-pooled-analysis-of-19-trials
#4
REVIEW
Fausto Petrelli, Tiziana Comito, Antonio Ghidini, Valter Torri, Marta Scorsetti, Sandro Barni
PURPOSE: Although surgery is the standard of care for resectable pancreatic cancer (PC), standard-dose chemoradiation therapy and chemotherapy alone are suitable for patients with unresectable disease. Stereotactic body radiation therapy (SBRT) is an alternative, focused local therapy that delivers high radiation doses within a few fractions to the cancer, sparing the surrounding critical tissue. We performed a systematic review and pooled analysis of published trials to evaluate the efficacy and safety of this emerging treatment modality...
February 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28063371/individual-dose-due-to-radioactivity-accidental-release-from-fusion-reactor
#5
Baojie Nie, Muyi Ni, Shiping Wei
As an important index shaping the design of fusion safety system, evaluation of public radiation consequences have risen as a hot topic on the way to develop fusion energy. In this work, the comprehensive public early dose was evaluated due to unit gram tritium (HT/HTO), activated dust, activated corrosion products (ACPs) and activated gases accidental release from ITER like fusion reactor. Meanwhile, considering that we cannot completely eliminate the occurrence likelihood of multi-failure of vacuum vessel and tokamak building, we conservatively evaluated the public radiation consequences and environment restoration after the worst hypothetical accident preliminarily...
December 11, 2016: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28058710/stereotactic-ablative-radiotherapy-for-patients-with-unresectable-or-medically-inoperable-cholangiocarcinoma
#6
Ming-Yueh Liu, Cheng-Hsiang Lo, Chun-Shu Lin, Hsing-Lung Chao, Jen-Fu Yang, Kuen-Tze Lin, Chao-Yueh Fan, Yu-Fu Su, Wen-Yen Huang
PURPOSE: The role of stereotactic ablative radiotherapy (SABR) in patients with unresectable or medically inoperable cholangiocarcinoma remains unclear. We examined the efficacy and safety of SABR in this group of patients. METHODS: From January 2008 to December 2014, 15 patients with 17 lesions were included in this study. The lesions included 14 intrahepatic, 1 hilar, and 2 distal bile duct tumors. Three patients were classified as medically inoperable because of old age or multiple comorbidities...
January 5, 2017: Tumori
https://www.readbyqxmd.com/read/28054474/recommendations-for-radiographers-and-radiation-therapists-drawn-from-an-analysis-of-errors-on-australian-radiation-incident-registers
#7
Gary Denham, Nicole Page
INTRODUCTION: The Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) collect reported incidents for inclusion in the Australian Radiation Incident Register (ARIR), a database of radiation incident reports that occur within Australia. While the information on previous radiation incidents is available, there is little information on the lessons that can be learned from those past incidents to help prevent the same errors reoccurring. The aims of the study were to investigate what radiation incident registers are publicly available in Australia and to utilise the information contained within the ARIR and any other state or territory radiation protection authority registers to make recommendations for radiographers and radiation therapists to prevent future adverse events...
January 5, 2017: Journal of Medical Radiation Sciences
https://www.readbyqxmd.com/read/28054186/radiographic-capsule-based-system-for-non-cathartic-colorectal-cancer-screening
#8
Yoav Kimchy, Ronen Lifshitz, Shlomo Lewkowitz, Guiseppe Bertuccio, Nadir Arber, Nathan Gluck, Perry J Pickhardt
Many patients are reluctant to undergo optical colonoscopy for colorectal cancer screening. The Check-Cap colon imaging system is a non-invasive test that comprises an ingestible imaging capsule that emits and detects ultra-low-dose radiation. The capsule generates a 3D reconstruction of the colonic lumen for detection of polyps and cancer. Preliminary preclinical and clinical testing has demonstrated safety and feasibility. Mean radiation dose is estimated at 0.04 mSv. In conclusion, we describe a novel capsule-based, patient-friendly colorectal test that holds potential for non-invasive screening...
January 4, 2017: Abdominal Radiology
https://www.readbyqxmd.com/read/28053021/first-in-human-phase-1-study-of-the-oral-inhibitor-of-indoleamine-2-3-dioxygenase-1-epacadostat-incb024360-in-patients-with-advanced-solid-malignancies
#9
Gregory L Beatty, Peter J O'Dwyer, Jason Clark, Jack G Shi, Kevin J Bowman, Peggy Scherle, Robert C Newton, Richard Schaub, Janet Maleski, Lance Leopold, Thomas F Gajewski
PURPOSE: Indoleamine 2,3-dioxygenase-1 (IDO1) catalyzes the degradation of tryptophan to N-formyl-kynurenine. Overexpressed in many solid malignancies, IDO1 can promote tumor escape from host immunosurveillance. This first-in-human phase 1 study investigated the maximum tolerated dose, safety, pharmacokinetics, pharmacodynamics, and antitumor activity of epacadostat (INCB024360), a potent and selective inhibitor of IDO1. PATIENTS AND METHODS: Fifty-two patients with advanced solid malignancies were treated with epacadostat (50 mg once daily or 50, 100, 300, 400, 500, 600, or 700 mg twice daily [BID]) in a dose-escalation 3 + 3 design and evaluated in 28-day cycles...
January 4, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28049554/characterization-of-bauxite-residue-red-mud-for-235-u-238-u-232-th-and-40-k-using-neutron-activation-analysis-and-the-radiation-dose-levels-as-modeled-by-mcnp
#10
S Landsberger, A Sharp, S Wang, Y Pontikes, A H Tkaczyk
This study employs thermal and epithermal neutron activation analysis (NAA) to quantitatively and specifically determine absorption dose rates to various body parts from uranium, thorium and potassium. Specifically, a case study of bauxite residue (red mud) from an industrial facility was used to demonstrate the feasibility of the NAA approach for radiological safety assessment, using small sample sizes to ascertain the activities of (235)U, (238)U, (232)Th and (40)K. This proof-of-concept was shown to produce reliable results and a similar approach could be used for quantitative assessment of other samples with possible radiological significance...
December 31, 2016: Journal of Environmental Radioactivity
https://www.readbyqxmd.com/read/28049375/comparative-effectiveness-of-treatment-choices-for-graves-hyperthyroidism-a-historical-cohort-study
#11
Vishnu Sundaresh, Juan P Brito, Prabin Thapa, Rebecca S Bahn, Marius N Stan
Introduction The optimum therapy for Graves' Disease (GD) is chosen following discussion between physician and patient regarding benefits, drawbacks, potential side effects, and logistics of the various treatment options and takes into account patient values and preferences. This cohort study aimed to provide useful information for this discussion regarding the usage, efficacy and adverse effect profile of radioactive iodine (RAI), antithyroid drugs (ATDs), and thyroidectomy in a tertiary healthcare facility...
January 3, 2017: Thyroid: Official Journal of the American Thyroid Association
https://www.readbyqxmd.com/read/28048918/su-f-r-11-designing-quality-and-safety-informatics-through-implementation-of-a-ct-radiation-dose-monitoring-program
#12
J M Wilson, E Samei
PURPOSE: Recent legislative and accreditation requirements have driven rapid development and implementation of CT radiation dose monitoring solutions. Institutions must determine how to improve quality, safety, and consistency of their clinical performance. The purpose of this work was to design a strategy and meaningful characterization of results from an in-house, clinically-deployed dose monitoring solution. METHODS: A dose monitoring platform was designed by our imaging physics group that focused on extracting protocol parameters, dose metrics, and patient demographics and size...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048903/su-f-e-17-a-dedicated-teaching-and-research-linac-as-a-stepping-stone-to-introduce-medical-physics-to-students
#13
L Beaulieu, L Gingras, M Bergeron, L Archambault
PURPOSE: This work describes how a non-clinical, research and teaching Linac is used as an extremely motivating and exciting way to introduce students to medical physics. METHODS: The dedicated facility was inaugurated in 2014. The facility is composed of a fully equipped and functional state-of-the-art Varian TrueBeam Linac and a complete set of physics instruments and QA phantoms for the Linac and onboard imaging. The Linac bunker and treatment console are oversized such that a class of 12-15 can comfortably fit, seated if needed for longer sessions...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048902/we-g-brc-00-experiences-with-tg100-in-clinical-use
#14
Grace Gwe-Ya Kim
: Failure Mode and Effects Analysis (FMEA) originated as an industrial engineering technique used for risk management and safety improvement of complex processes. In the context of radiotherapy, the AAPM Task Group 100 advocates FMEA as the framework of choice for establishing clinical quality management protocols. However, there is concern that widespread adoption of FMEA in radiation oncology will be hampered by the perception that implementation of the tool will have a steep learning curve, be extremely time consuming and labor intensive, and require additional resources...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048881/we-h-brb-02-where-do-we-stand-in-the-applications-of-big-data-in-radiation-oncology
#15
L Xing
: Big Data in Radiation Oncology: (1) Overview of the NIH 2015 Big Data Workshop, (2) Where do we stand in the applications of big data in radiation oncology?, and (3) Learning Health Systems for Radiation Oncology: Needs and Challenges for Future Success The overriding goal of this trio panel of presentations is to improve awareness of the wide ranging opportunities for big data impact on patient quality care and enhancing potential for research and collaboration opportunities with NIH and a host of new big data initiatives...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048846/mo-de-204-02-optimization-of-the-patient-ct-dose-in-europe
#16
V Tsapaki
: The main topic of the session is to show how dose optimization is being implemented in various regions of the world, including Europe, Australia, North America and other regions. A multi-national study conducted under International Atomic Energy Agency (IAEA) across more than 50 less resourced countries gave insight into patient radiation doses and safety practices in CT, mammography, radiography and interventional procedures, both for children and adults. An important outcome was the capability development on dose assessment and management...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048806/su-g-iep4-05-experience-with-a-practical-approach-to-the-release-of-radioactive-patients-from-radiation-safety-isolation
#17
R Wendt, W Erwin, A Fisher, S Jones, S Jimenez, F Wong, A Jessop
PURPOSE: The radioactive patient releases of the nuclear medicine department in a large cancer center were analyzed to compare the estimated doses to others to the regulatory limit and institutional targets and to gauge how onerous the patients' instructions were. METHODS: In-house software that implements the NUREG 1556 approach and further considers fellow travelers, children and pregnant women and members of the public following Siegel, et al., is used to calculate release timing and to provide patients with individualized instructions...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048801/su-f-t-39-comparing-nomograms-for-ordering-of-palladium-103-seeds-for-dynamic-intraoperative-prostate-seed-implantation
#18
P Taylor, L Wang, A Riegel
PURPOSE: Several nomograms exist for the purpose of ordering palladium- 103 seeds for permanent prostate seed implants. Excess seeds pose additional radiation safety risks and increase the cost of care. This study compared three seed ordering nomograms with seed counts from dynamic intra-operative PSI to determine (1) the cause of excess seeds and (2) the optimal nomogram for our institution. METHODS: Pre-operative and intra-operative clinical data were collected for 100 Gy (n=151) and 125 Gy (n=224) prostate seed implants...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048788/mo-fg-207a-03-radiation-and-cancer-perspectives-from-the-trenches-are-we-providing-care-or-promoting-scare
#19
D Frush
: There has been increasing use of CT scans globally. This increased use is not in itself of concern, and largely reflects the remarkable clinical benefits of CT. Inappropriate use of CT is, however, of concern, particularly as the potential for carcinogenic effects is yet to be fully understood. The first major media attention to cancer risk from CT scan arose from a series of papers and an Editorial published in AJR in 2001. This was followed by another series of papers in 2007 and associated media attention to the estimation of the number of cancer deaths that may occur in US as a result of radiation exposure from CT...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048780/tu-ab-204-00-cdrh-fda-regulatory-processes-and-device-science-activities
#20
Anita Nosratieh
: The responsibilities of the Food and Drug Administration (FDA) have increased since the inception of the Food and Drugs Act in 1906. Medical devices first came under comprehensive regulation with the passage of the 1938 Food, Drug, and Cosmetic Act. In 1971 FDA also took on the responsibility for consumer protection against unnecessary exposure to radiation-emitting devices for home and occupational use. However it was not until 1976, under the Medical Device Regulation Act, that the FDA was responsible for the safety and effectiveness of medical devices...
June 2016: Medical Physics
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