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Radiation safety

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https://www.readbyqxmd.com/read/28927206/preoperative-magnetic-resonance-and-intraoperative-computed-tomography-fusion-for-real-time-neuronavigation-in-intramedullary-lesion-surgery
#1
Francesco Costa, Alessandro Ortolina, Andrea Cardia, Marco Riva, Martina Revay, Guido Pecchioli, Carla Daniela Anania, Francesco Asteggiano, Maurizio Fornari
BACKGROUND: Image-guided surgery techniques in spinal surgery are usually based upon fluoroscopy or computed tomography (CT) scan, which allow for a real-time navigation of bony structures, though not of neural structures and soft tissue remains. OBJECTIVE: To verify the effectiveness and efficacy of a novel technique of imaging merging between preoperative magnetic resonance imaging (MRI) and intraoperative CT scan during removal of intramedullary lesions. METHODS: Ten consecutive patients were treated for intramedullary lesions using a navigation system aid...
April 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28926797/experimental-study-of-radiation-dose-rate-at-different-strategic-points-of-the-baec-triga-research-reactor
#2
M Ajijul Hoq, M A Malek Soner, M A Salam, M M Haque, Salma Khanom, S M Fahad
The 3MW TRIGA Mark-II Research Reactor of Bangladesh Atomic Energy Commission (BAEC) has been under operation for about thirty years since its commissioning at 1986. In accordance with the demand of fundamental nuclear research works, the reactor has to operate at different power levels by utilizing a number of experimental facilities. Regarding the enquiry for safety of reactor operating personnel and radiation workers, it is necessary to know the radiation level at different strategic points of the reactor where they are often worked...
September 9, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28923036/safety-of-intravenously-applied-mistletoe-extract-results-from-a-phase-i-dose-escalation-study-in-patients-with-advanced-cancer
#3
Roman Huber, Dietrich Schlodder, Carola Effertz, Sabine Rieger, Wilfried Tröger
BACKGROUND: Mistletoe extracts have anti-tumor properties and are approved for subcutaneous use in cancer patients. Data on Intravenous application are limited. METHODS: An aqueous extract from pine-mistletoe was used to investigate maximum tolerable dose (MTD) and safety of intravenous application. It was infused once weekly for 3 weeks in patients with advanced cancer. Any type of cancer was included; relevant exclusion criteria were concurrent chemo- or radiation therapy...
September 18, 2017: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/28921536/technical-note-a-simulation-study-on-the-feasibility-of-radiotherapy-dose-enhancement-with-calcium-tungstate-and-hafnium-oxide-nano-and-microparticles
#4
Nicholas J Sherck, You-Yeon Won
PURPOSE: To assess the radiotherapy dose enhancement (RDE) potential of calcium tungstate (CaWO4 ) and hafnium oxide (HfO2 ) nano- and microparticles (NPs). A Monte Carlo simulation study was conducted to gauge their respective RDE potentials relative to that of the broadly studied gold (Au) NP. The study was warranted due to the promising clinical and preclinical studies involving both CaWO4 and HfO2 NPs as RDE agents in the treatment of various types of cancers. The study provides a baseline RDE to which future experimental RDE trends can be compared to...
September 18, 2017: Medical Physics
https://www.readbyqxmd.com/read/28919394/concomitant-chemotherapy-and-radiotherapy-with-sbrt-boost-for-unresectable-stage-iii-non-small-cell-lung-cancer-a-phase-i-study
#5
Kristin A Higgins, Rathi N Pillai, Zhengjia Chen, Sibo Tian, Chao Zhang, Pretesh Patel, Suchita Pakkala, Jay Shelton, Seth D Force, Felix G Fernandez, Conor E Steuer, Taofeek K Owonikoko, Suresh S Ramalingam, Jeffrey D Bradley, Walter J Curran
PURPOSE: Stereotactic Body Radiation Therapy (SBRT) is now the standard of care in medically inoperable stage I non-small cell lung cancer, yielding high rates of local control. It is unknown if SBRT can be safely utilized in the locally advanced NSCLC setting. This multi-institution phase I study evaluated the safety of 44 Gy conventionally fractionated thoracic radiation with concurrent chemotherapy plus a dose escalated SBRT boost to both the primary tumor and involved mediastinal lymph nodes...
September 12, 2017: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/28919248/safety-of-differential-radiation-dosing-in-lymph-node-positive-necks-treated-with-imrt
#6
Stephen Sozio, Zorimar Rivera-Núñez, Omar Mahmoud, Sung Kim
PURPOSE: When treating head and neck squamous cell carcinoma (HNSCC) with intensity modulated radiation therapy (IMRT), it is common to use several dose levels for a lymph node positive neck: full dose (66-70 Gy) to gross cancer, intermediate dose (59-63 Gy) to higher risk neck regions, and standard dose (50-54 Gy) to lower risk neck regions. There is no consensus regarding how much of the neck should receive intermediate versus standard dose, however. METHODS AND MATERIALS: HNSCC patients treated with IMRT were identified from 2 academic medical centers between 2004 and 2016...
July 19, 2017: Practical Radiation Oncology
https://www.readbyqxmd.com/read/28917256/postoperative-stereotactic-body-radiotherapy-for-spinal-metastases
#7
Majed Alghamdi, Chia-Lin Tseng, Sten Myrehaug, Pejman Maralani, Chris Heyn, Hany Soliman, Young Lee, Mark Ruschin, Leodante Da Costa, Victor Yang, Mikki Campbell, Arjun Sahgal
Spine is a common site of metastases in cancer patients. Spine surgery is indicated for select patients, typically those with mechanical instability and/or malignant epidural spinal cord (or cauda equina) compression. Although post-operative conventional palliative external beam radiation therapy has been the standard of care, technical improvements in radiation planning and image-guided radiotherapy have allowed for the application of stereotactic body radiotherapy (SBRT) to the spine. Spine SBRT is intended to ablate residual tumor and optimize local control by delivering several fold greater biologically effective doses...
September 2017: Chinese Clinical Oncology
https://www.readbyqxmd.com/read/28917251/advances-in-external-beam-stereotactic-body-radiotherapy-principle-concerns-in-implementing-a-liver-radiation-program
#8
Stewart Gaede, Michael I Lock
Despite significant advances in diagnosis, surgery and medical oncology, patients with primary and secondary liver cancer have some of the worst prognoses in oncology. In addition, the incidence of liver cancer is expected to increase. For this reason, centres are seeking new treatments and establishing specialized multidisciplinary teams. This article will focus on the evidence and practical data to assist in setting up or improving current process pathways, to provide an efficient and safe radiotherapy program for liver...
September 2017: Chinese Clinical Oncology
https://www.readbyqxmd.com/read/28917248/stereotactic-body-radiation-therapy-for-prostate-cancer-a-review
#9
Waqar Haque, E Brian Butler, Bin S Teh
Prostate cancer can be managed with external beam radiation therapy, delivered with either protons or photons, brachytherapy, surgery, or active surveillance. Advances in imaging and radiation therapy delivery have allowed treatment of prostate cancer using ultra-hypofractionated radiation therapy with a high dose per fraction using a technique called stereotactic body radiation therapy (SBRT). While no randomized trials have compared the efficacy of SBRT to conventionally fractionated radiation therapy (CFRT), numerous prospective trials and retrospective reviews have demonstrated the safety and efficacy of SBRT for localized prostate cancer, used either definitively or as a boost along with CFRT...
September 2017: Chinese Clinical Oncology
https://www.readbyqxmd.com/read/28916903/merkel-cell-carcinoma-epidemiology-pathogenesis-diagnosis-and-therapy
#10
REVIEW
Teresa Amaral, Ulrike Leiter, Claus Garbe
Merkel cell carcinoma (MCC) is a rare and aggressive skin cancer with a neuroendocrine phenotype. Incidence varies according to the geographic regions but is overall increasing. Different risk factors have been identified namely advanced age, immunosuppression, and ultraviolet light exposure. An association between MCC and polyomavirus infection is known. However, the exact mechanism that leads to carcinogenesis is yet to be fully understood. Surgery when feasible is the recommended treatment for localized disease, followed by adjuvant radiation or chemoradiation...
September 16, 2017: Reviews in Endocrine & Metabolic Disorders
https://www.readbyqxmd.com/read/28914558/robotics-in-percutaneous-cardiovascular-interventions
#11
Ali Pourdjabbar, Lawrence Ang, Omid Behnamfar, Mitul P Patel, Ryan R Reeves, Paul T Campbell, Ryan D Madder, Ehtisham Mahmud
The fundamental technique of performing percutaneous cardiovascular (CV) interventions has remained unchanged and requires operators to wear heavy lead aprons to minimize exposure to ionizing radiation. Robotic technology is now being utilized in interventional cardiology partially as a direct result of the increasing appreciation of the long-term occupational hazards of the field. This review was undertaken to report the clinical outcomes of percutaneous robotic coronary and peripheral vascular interventions...
September 15, 2017: Expert Review of Cardiovascular Therapy
https://www.readbyqxmd.com/read/28904975/rapd-profiling-dna-fragmentation-and-histomorphometric-examination-in-brains-of-wistar-rats-exposed-to-indoor-2-5%C3%A2-ghz-wi-fi-devices-radiation
#12
A O Ibitayo, O B Afolabi, A J Akinyemi, T I Ojiezeh, K O Adekoya, O O Ojewunmi
The advent of Wi-Fi connected high technology devices in executing day-to-day activities is fast evolving especially in developing countries of the world and hence the need to assess its safety among others. The present study was conducted to investigate the injurious effect of radiofrequency emissions from installed Wi-Fi devices in brains of young male rats. Animals were divided into four equal groups; group 1 served as control while groups 2, 3, and 4 were exposed to 2.5 Ghz at intervals of 30, 45, and 60 consecutive days with free access to food and water ad libitum...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28903443/radioligand-therapy-of-metastatic-prostate-cancer-using-177-lu-psma-617-after-radiation-exposure-to-223-ra-dichloride
#13
Hojjat Ahmadzadehfar, Stefanie Zimbelmann, Anna Yordanova, Rolf Fimmers, Stefan Kürpig, Elisabeth Eppard, Florian C Gaertner, Xiao Wei, Stefan Hauser, Markus Essler
Radioligand therapy with (177)Lu-PSMA-617 is an innovative and effective therapy for castrate-resistant metastatic prostate cancer patients. For patients with symptomatic bone metastases without visceral metastases, the guidelines recommend radionuclide therapy with (223)Ra-dichloride as a single therapeutic agent or in combination with hormone therapy. The aim of this study was to evaluate the safety of repeated cycles of (177)Lu-PSMA-617 after exposure to more cycles of (223)Ra. Forty-nine patients were treated with three cycles of Lu-PSMA-617 divided into two groups subjected to a history of therapy with (223)Ra...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28900055/enriching-a-culture-of-radiation-safety-excellence-using-a-patient-radiation-dose-monitoring-program
#14
Shelia Regan, Jan Clark
No abstract text is available yet for this article.
July 2017: Radiologic Technology
https://www.readbyqxmd.com/read/28898346/-treatment-of-hyperthyroidism-with-radioiodine-during-hemodialysis-report-of-one-case
#15
Claudia Hurtado, María Soledad Báez, Anabel Bate, Claudio Opazo, Mauricio Troncoso
Although radioiodine (131-I) can be used as treatment of hyperthyroidism for patients in hemodialysis, its use is limited and the experience is mainly related to differentiated thyroid carcinoma. We report a 58 years old female on hemodialysis with recurrent hyperthyroidism after propylthiouracil treatment. She was successfully treated with 131-I and four months after the intervention her euthyroid state was confirmed. We measured 131-I activity in blood, dialysate liquid and other waste products, as well as patient radiation exposure rates...
May 2017: Revista Médica de Chile
https://www.readbyqxmd.com/read/28898130/imaging-of-children-with-nontraumatic-headaches
#16
Anna Trofimova, Brianna L Vey, Mark E Mullins, David S Wolf, Nadja Kadom
OBJECTIVE: Headache in children is a common symptom and often is worrisome for clinicians and parents because of the breadth of possible underlying significant abnormalities, including meningitis, brain neoplasms, and intracranial hemorrhage. For this reason, many children with headaches undergo neuroimaging. Most neuroimaging studies performed of children with headaches have normal findings but may lead to significant downstream effects, including unnecessary exposure to ionizing radiation or sedation, as well as unnecessary cost to the health care system...
September 12, 2017: AJR. American Journal of Roentgenology
https://www.readbyqxmd.com/read/28895375/knowledge-attitudes-and-sun-safety-practices-among-agricultural-workers-in-the-autonomous-province-of-trento-north-eastern-italy-2016
#17
Matteo Riccò, Benedetta Razio, Leonardo Poletti, Claudio Panato
BACKGROUND: The purpose of this study was to determine evaluate sun safety knowledge, attitudes and practices (KAP) among agricultural workers (AWs) in the Autonomous Province of Trento (North-Eastern Italy). METHODS: A cross sectional study was performed among AWs who attended pesticide training courses (2016). Participants received a structured questionnaire focusing on KAP towards sun protective behaviours. Synthetic scores for knowledge (GKS), risk perception (RPS), behavioural adaptation and use of personal protective equipment (SPPS) were calculated...
September 8, 2017: Giornale Italiano di Dermatologia e Venereologia: Organo Ufficiale, Società Italiana di Dermatologia e Sifilografia
https://www.readbyqxmd.com/read/28895282/a-patient-safety-education-program-in-a-medical-physics-residency
#18
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/28893300/stereotactic-body-radiotherapy-for-stage-i-non-small-cell-lung-cancer-using-higher-doses-for-larger-tumors-results-of-the-second-study
#19
Akifumi Miyakawa, Yuta Shibamoto, Fumiya Baba, Yoshihiko Manabe, Taro Murai, Chikao Sugie, Takeshi Yanagi, Taiki Takaoka
BACKGROUND: Efficacy of stereotactic body radiotherapy (SBRT) in stage I non-small-cell lung cancer (NSCLC) has almost been established. In Japan, the protocol of 48 Gy in 4 fractions over 4 days has been most often employed, but higher doses may be necessary to control large tumors. Previously, we conducted a clinical study using SBRT for stage I NSCLC employing different doses depending on tumor diameter, which was closed in 2008. Thereafter, a new study employing higher doses has been conducted, which is reported here...
September 11, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28892246/novel-hyperthermia-applicator-system-allows-adaptive-treatment-planning-preliminary-clinical-results-in-tumour-bearing-animals
#20
S Dressel, M-C Gosselin, M H Capstick, E Carrasco, M S Weyland, S Scheidegger, E Neufeld, N Kuster, S Bodis, C Rohrer Bley
Hyperthermia (HT) as an adjuvant to radiation therapy (RT) is a multimodality treatment method to enhance therapeutic efficacy in different tumours. High demands are placed on the hardware and treatment planning software to guarantee adequately planned and applied HT treatments. The aim of this prospective study was to determine the effectiveness and safety of the novel HT system in tumour-bearing dogs and cats in terms of local response and toxicity as well as to compare planned with actual achieved data during heating...
September 11, 2017: Veterinary and Comparative Oncology
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