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Radiation safety

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https://www.readbyqxmd.com/read/28645457/diagnostic-medical-imaging-in-pediatric-patients-and-subsequent-cancer-risk
#1
REVIEW
David J Mulvihill, Sachin Jhawar, John B Kostis, Sharad Goyal
The use of diagnostic medical imaging is becoming increasingly more commonplace in the pediatric setting. However, many medical imaging modalities expose pediatric patients to ionizing radiation, which has been shown to increase the risk of cancer development in later life. This review article provides a comprehensive overview of the available data regarding the risk of cancer development following exposure to ionizing radiation from diagnostic medical imaging. Attention is paid to modalities such as computed tomography scans and fluoroscopic procedures that can expose children to radiation doses orders of magnitude higher than standard diagnostic x-rays...
June 20, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28641684/novel-indications-for-commonly-used-medications-as-radiation-protectants-in-spaceflight
#2
Mark F McLaughlin, Dorit B Donoviel, Jeffrey A Jones
In the space environment, the traditional radioprotective principles of time, distance, and shielding become difficult to implement. Additionally, the complex radiation environment inherent in space, the chronic exposure timeframe, and the presence of numerous confounding variables complicate the process of creating appropriate risk models for astronaut exposure. Pharmaceutical options hold tremendous promise to attenuate acute and late effects of radiation exposure in the astronaut population. Pharmaceuticals currently approved for other indications may also offer radiation protection, modulation, or mitigation properties along with a well-established safety profile...
July 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28639030/utilization-of-hypofractionated-whole-breast-radiation-therapy-in-patients-receiving-chemotherapy-a-national-cancer-database-analysis
#3
Tejan P Diwanji, Jason K Molitoris, Arpit M Chhabra, James W Snider, Soren M Bentzen, Katherine H Tkaczuk, Paula Y Rosenblatt, Susan B Kesmodel, Emily C Bellavance, Randi J Cohen, Sally B Cheston, Elizabeth M Nichols, Steven J Feigenberg
PURPOSE: Results from four major hypofractionated whole-breast radiotherapy (HF-WBRT) trials have demonstrated equivalence in select patients with early-stage breast cancer when compared with conventionally fractionated WBRT (CF-WBRT). Because relatively little data were available on patients receiving neoadjuvant or adjuvant chemotherapy, consensus guidelines published in 2011 did not endorse the use of HF-WBRT in this population. Our goal is to evaluate trends in utilization of HF-WBRT in patients receiving chemotherapy...
June 21, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28637800/pharmacokinetics-biodistribution-and-radiation-dosimetry-for-89-zr-trastuzumab-in-patients-with-esophagogastric-cancer
#4
Joseph A O'Donoghue, Jason S Lewis, Neeta Pandit-Taskar, Stephen E Fleming, Heiko Schoder, Steven M Larson, Volkan Beylergil, Shutian Ruan, Serge Lyashchenko, Pat B Zanzonico, Wolfgang Andreas Weber, Jorge A Carrasquillo, Yelena Y Janjigian
Trastuzumab with chemotherapy improves clinical outcomes in patients with human epidermal growth factor receptor 2 (HER2)-positive esophagogastric adenocarcinoma (EGA). Despite the therapeutic benefit, responses are rarely complete and the majority of patients develop progression. This is the first report evaluating (89)Zr-trastuzumab in HER2-positive EGA in which we evaluate the safety, pharmacokinetics, biodistribution, and dosimetry. Methods: Trastuzumab was conjugated with deferoxamine and radiolabeled with (89)Zr...
June 21, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28636658/efficacy-and-safety-of-ultrasound-guided-implantation-of-fiducial-markers-in-the-liver-for-stereotactic-body-radiation-therapy
#5
So Hyun Park, Hyung Jin Won, So Yeon Kim, Yong Moon Shin, Pyo Nyun Kim, Sang Min Yoon, Jin-Hong Park, Jong Hoon Kim
OBJECTIVE: Stereotactic body radiation therapy (SBRT) for the treatment of a malignancy in the liver requires the perilesional implantation of fiducial markers for lesion detection. The purpose of this study is to evaluate the efficacy and safety of ultrasound (US) -guided marker implantation for SBRT. METHODS: We retrospectively reviewed 299, US-guided, intrahepatic fiducial markers implanted in 101 patients between November 2013 and September 2014. SBRT-planning CT images were analyzed to determine the technical success of the implantation, the mean distance between the tumor margin and the marker, with the ideal location of fiducials defined as the distance between a marker and a tumor less than 3 cm and the distance between markers greater than 2 cm according to the tumor conspicuity seen on gray-scale US and the artifact obscuring tumor margins...
2017: PloS One
https://www.readbyqxmd.com/read/28630212/a-pilot-study-of-stereotactic-body-radiation-therapy-combined-with-cytoreductive-nephrectomy-for-metastatic-renal-cell-carcinoma
#6
Anurag K Singh, Timothy B Winslow, Mohammad Habiby Kermany, Vincent Goritz, Lilia Heit, Austin Miller, Nicholas C Hoffend, Leighton C Stein, Lalith Kumaraswamy, Graham W Warren, Wiam Bshara, Kunle Odunsi, Junko Matsuzaki, Scott I Abrams, Thomas Schwaab, Jason B Muhitch
<p>While stereotactic body radiation therapy (SBRT) can reduce tumor volumes in metastatic renal cell carcinoma (mRCC) patients, little is known regarding the immunomodulatory effects of high-dose radiation in the tumor microenvironment. The main objectives of this pilot study were to assess the safety and feasibility of nephrectomy following SBRT treatment of mRCC patients and analyze the immunological impact of high-dose radiation.</p> <br /><br />Experimental Design: Human RCC cell lines were irradiated and evaluated for immunomodulation...
June 19, 2017: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/28629928/safety-and-efficacy-of-endovascular-fiducial-marker-insertion-for-cyberknife-stereotactic-radiation-therapy-planning-in-early-stage-lung-cancer
#7
Mikael Mongeon, Florence Thibault, Carl Chartrand-Lefebvre, Andrei-Bogdan Gorgos, Gilles Soulez, Edith Filion, Eric Therasse
PURPOSE: To evaluate the safety and efficacy of endovascular fiducial markers (EVFMs) for CyberKnife stereotactic radiation therapy (RT) of malignant lung neoplasms in patients with contraindications to percutaneous fiducial marker (PTFM) placement. MATERIALS AND METHODS: Between January 2011 and December 2013, 15 patients (7 men and 8 women) aged 59-87 years (mean, 73 y) underwent EVFM placement and 109 patients (54 men and 55 women) aged 55-92 years (mean, 73 y) underwent 114 PTFM placements...
June 16, 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28629376/radiation-therapy-for-older-patients-with-brain-tumors
#8
REVIEW
Giuseppe Minniti, Andrea Riccardo Filippi, Mattia Falchetto Osti, Umberto Ricardi
The incidence of brain tumors in the elderly population has increased over the last few decades. Current treatment includes surgery, radiotherapy and chemotherapy, but the optimal management of older patients with brain tumors remains a matter of debate, since aggressive radiation treatments in this population may be associated with high risks of neurological toxicity and deterioration of quality of life. For such patients, a careful clinical status assessment is mandatory both for clinical decision making and for designing randomized trials to adequately evaluate the optimal combination of radiotherapy and chemotherapy...
June 19, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28623670/feasibility-and-safety-of-right-and-left-heart-catheterization-via-an-antecubital-fossa-vein-and-the-radial-artery-in-patients-with-heart-failure
#9
Domenico D'Amario, Francesco Burzotta, Antonio M Leone, Italo Porto, Giampaolo Niccoli, Cristina Aurigemma, Aureliano Ruggio, Josip A Borovac, Massimo Massetti, Carlo Trani, Filippo Crea
OBJECTIVES: Heart failure is the leading cause of hospitalization among patients older than 65 years of age. A significant proportion of patients require heart catheterization for diagnostic, therapeutic, and prognostic purposes. To determine the feasibility and safety of full arm-arm catheterization access, we aimed to compare this approach with other established catheterization approaches. METHODS AND RESULTS: In this retrospective cohort study, a total of 493 consecutive patients with heart failure requiring right and left heart catheterization were studied and analyzed...
June 15, 2017: Journal of Invasive Cardiology
https://www.readbyqxmd.com/read/28622892/a-phase-ii-trial-of-induction-nab-paclitaxel-and-cisplatin-followed-by-concurrent-chemoradiotherapy-in-patients-with-locally-advanced-nasopharyngeal-carcinoma
#10
Liang-Ru Ke, Wei-Xiong Xia, Wen-Ze Qiu, Xin-Jun Huang, Ya-Hui Yu, Hu Liang, Guo-Ying Liu, Yan-Qun Xiang, Xiang Guo, Xing Lv
OBJECTIVES: Nanoparticle albumin-bound paclitaxel (NAB-paclitaxel) was designed to avoid solvent-related toxicities, and improve anti-tumor efficacy via increasing paclitaxel's intratumoral concentration and its uptake by tumor cells. This trial aimed to determine the safety and efficacy of induction NAB-paclitaxel combined with cisplatin followed by concurrent chemoradiotherapy (CCRT) in patients with locally advanced nasopharyngeal carcinoma (LA-NPC). PATIENTS AND METHODS: Patients with stage III-IVb NPC received NAB-paclitaxel (260mg/m(2)) combined with cisplatin (80mg/m(2)) intravenously on days 1 and 22, followed by cisplatin (80mg/m(2)) on days 43 and 64, concomitant with intensity-modulated radiation therapy...
July 2017: Oral Oncology
https://www.readbyqxmd.com/read/28622797/making-the-best-value-of-clinical-radiology-irefer-guidelines-8th-edition
#11
D Remedios, B France, M Alexander
New uses of medical imaging as well as over-diagnosis and wasteful imaging have led to a 10% per annum growth in computed tomography (CT) and magnetic resonance imaging (MRI). Personalised value to the patient will be helped by referral guidelines for the best test first, adding evidence-based technical value to the investigation to answer the clinical question, thus providing allocative value to the commissioners of medical imaging. Appropriate imaging is driven by the need for effective decisions, radiation safety, and cost awareness...
June 13, 2017: Clinical Radiology
https://www.readbyqxmd.com/read/28622559/controlling-sunbathing-safety-during-the-summer-holidays-the-solar-uv-campaign-at-baltic-sea-coast-in-2015
#12
Jakub Guzikowski, Agnieszka E Czerwińska, Janusz W Krzyścin, Michał A Czerwiński
Information regarding the intensity of surface UV radiation, provided for the public, is frequently given in terms of a daily maximum UV Index (UVI), based on a prognostic model. The quality of the UV forecast depends on the accuracy of column amount of ozone and cloudiness prediction. Daily variability of UVI is needed to determine the risk of the UV overexposure during outdoor activities. Various methods of estimating the temporary UVI and the maximum duration of UV exposures (received a dose equal to minimal erythemal dose - MED), at the site of sunbathing, were compared...
April 8, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28621668/blocking-epithelial-to-mesenchymal-transition-in-glioblastoma-with-a-sextet-of-repurposed-drugs-the-eis-regimen
#13
Richard E Kast, Nicolas Skuli, Georg Karpel-Massler, Guido Frosina, Timothy Ryken, Marc-Eric Halatsch
This paper outlines a treatment protocol to run alongside of standard current treatment of glioblastoma- resection, temozolomide and radiation. The epithelial to mesenchymal transition (EMT) inhibiting sextet, EIS Regimen, uses the ancillary attributes of six older medicines to impede EMT during glioblastoma. EMT is an actively motile, therapy-resisting, low proliferation, transient state that is an integral feature of cancers' lethality generally and of glioblastoma specifically. It is believed to be during the EMT state that glioblastoma's centrifugal migration occurs...
June 1, 2017: Oncotarget
https://www.readbyqxmd.com/read/28619688/single-port-laparoscopy-in-gynecologic-oncology-seven-years-of-experience-at-a-single-institution
#14
Laura Moulton, Amelia M Jernigan, Caitlin Carr, Lindsey Freeman, Pedro F Escobar, Chad M Michener
BACKGROUND: Single port laparoscopy has gained popularity within minimally invasive gynecologic surgery for its feasibility, cosmetic outcomes and safety. However, within gynecologic oncology, there is limited data regarding short-term adverse outcomes and long term hernia risk in patients undergoing single port laparoscopic surgery. OBJECTIVE: To describe short-term outcomes and hernia rates in patients after single port laparoscopy in a gynecologic oncology practice...
June 12, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28614264/extremely-low-frame-rate-digital-fluoroscopy-in-catheter-ablation-of-atrial-fibrillation-a-comparison-of-2-versus-4-frame-rate
#15
Ji Hyun Lee, Jun Kim, Minsu Kim, Jongmin Hwang, You Mi Hwang, Joon-Won Kang, Gi-Byoung Nam, Kee-Joon Choi, You-Ho Kim
Despite the technological advance in 3-dimensional (3D) mapping, radiation exposure during catheter ablation of atrial fibrillation (AF) continues to be a major concern in both patients and physicians. Previous studies reported substantial radiation exposure (7369-8690 cGy cm) during AF catheter ablation with fluoroscopic settings of 7.5 frames per second (FPS) under 3D mapping system guidance. We evaluated the efficacy and safety of a low-frame-rate fluoroscopy protocol for catheter ablation for AF.Retrospective analysis of data on 133 patients who underwent AF catheter ablation with 3-D electro-anatomic mapping at our institute from January 2014 to May 2015 was performed...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28613380/influence-of-processing-and-storage-of-integral-grape-juice-vitis-labrusca-l-on-its-physical-and-chemical-characteristics-cytotoxicity-and-mutagenicity-in-vitro
#16
E Düsman, I V Almeida, E P Pinto, L Lucchetta, V E P Vicentini
Integral grape juice is extracted from the grape through processes that allow the retention of their natural composition. However, due to the severity of some processes, fruit juices can undergo changes in their quality. The present study evaluated the cytotoxic and mutagenic effects of integral grape juice by a cytokinesis-blocked micronucleus assay in Rattus norvegicus hepatoma cells (HTC) in vitro. Vitis labrusca L. (variety Concord) were produced organically and by a conventional system, and their juice was extracted by a hot extraction process...
May 31, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28612848/-ultraviolet-exposure-from-indoor-tanning-devices-as-a-potential-source-of-health-risks-basic-knowledge-of-the-proper-use-of-these-devices-for-practical-users-physicians-and-solarium-staff
#17
Jolanta Malinowska-Borowska, Elżbieta Janosik
Bearing in mind the adverse health effects of exposure to ultraviolet (UV) radiation in solarium, especially the risk of carcinogenesis, there is a need to adopt legal regulations by relevant Polish authorities. They should set out the principles for indoor tanning studios operation, supervision and service of the technical parameters of tanning devices and training programs to provide the staff with professional knowledge and other aspects of safety in these facilities. The mechanism of the harmful effects of ultraviolet radiation on the human body, scale of overexposure, resulting from excessive sunbathing are described...
June 14, 2017: Medycyna Pracy
https://www.readbyqxmd.com/read/28608526/clothing-protection-from-uvr-a-new-method-for-assessment
#18
Ryan Gage, William Leung, James Stanley, Anthony Reeder, Michelle Barr, Tim Chambers, Moira Smith, Louise Signal
Clothing modifies ultraviolet radiation exposure from the sun, and has an impact on skin cancer risk and the endogenous synthesis of vitamin D3 . There is no standardized method available for assessing body surface area covered by clothing, which limits generalizability between study findings. We calculated the body cover provided by 38 clothing items using diagrams of body surface area (BSA), adjusting the values to account for differences in BSA by age. Diagrams displaying each clothing item were developed and incorporated into a coverage assessment procedure (CAP)...
June 13, 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/28607610/remote-magnetic-catheter-navigation-versus-conventional-ablation-in-atrial-fibrillation-ablation-fluoroscopy-reduction
#19
Paul Chun Yih Lim, Joseph Jia Hong Toh, Julian Kenrick Xing Yuan Loh, Edward Chun Yi Lee, Daniel Thuan Tee Chong, Boon Yew Tan, Kah Leng Ho, Chi Keong Ching, Wee Siong Teo
BACKGROUND: Percutaneous transcatheter radiofrequency ablation of atrial fibrillation with remote controlled magnetic navigation (RMN) has been shown to reduce radiation exposure to patients and physicians compared with conventional manual (MAN) ablation techniques. METHODS: Catheter ablation for atrial fibrillation was performed utilizing RMN in 214 consecutive patients and MAN ablation techniques in 229 patients. We compared the fluoroscopy and procedural times between RMN and MAN catheter ablation of atrial fibrillation...
June 2017: Journal of Arrhythmia
https://www.readbyqxmd.com/read/28605448/efficacy-of-peptide-receptor-radionuclide-therapy-prrt-for-functional-metastatic-paraganglioma-and-phaeochromocytoma
#20
Grace Kong, Simona Grozinsky-Glasberg, Michael S Hofman, Jason Callahan, Amichay Meirovitz, Ofra Maimon, David A Pattison, David J Gross, Rodney J Hicks
Purpose: Treatment options for unresectable Paraganglioma (PGL)/Phaeochromocytoma (PCC), especially with uncontrolled secondary hypertension (HTN) are limited. Preliminary studies with PRRT suggest efficacy but data on HTN control and survival are lacking. We assessed PRRT outcomes in such patients from 2 referral centres. Methods: 20 consecutive patients (M:F=13:7; 21-77y.o.) with high somatostatin receptor (SSTR) expression treated with 177Lu-DOTA-octreotate, 9 with radiosensitising chemotherapy, were retrospectively reviewed...
June 9, 2017: Journal of Clinical Endocrinology and Metabolism
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