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https://www.readbyqxmd.com/read/29144490/neonatal-lung-ultrasound-exam-guidelines
#1
D Kurepa, N Zaghloul, L Watkins, J Liu
Point-of-care ultrasound (POC-US) is increasingly used especially in emergency and critical-care medicine. It is focused, quick and does not expose patients to ionizing radiation. It encompasses all organ systems and has well-defined indications. Lung ultrasound (LUS) represents one of the most exciting applications in the field of POC-US. It is particularly important to emphasize the role of LUS in neonatology due to the specific pathology inherent in lung immaturity as well as in the particular sensitivity of neonates to repeated radiation exposure...
November 16, 2017: Journal of Perinatology: Official Journal of the California Perinatal Association
https://www.readbyqxmd.com/read/29144163/demand-for-ct-scans-increases-during-transition-from-paediatric-to-adult-care-an-observational-study-from-2009-to-2015
#2
Pete Thurley, Jonathan Crookdake, Mark Norwood, Nigel Sturrock, Andrew W Fogarty
OBJECTIVE: Avoiding unnecessary radiation exposure is a clinical priority in children and young adults. We aimed to explore demand for CT scans in a busy general hospital with particular interest in the period of transition from paediatric to adult medical care. METHODS: We used an observational epidemiological study based in a teaching hospital. Data were obtained on numbers and rates of CT scans from 2009 to 2015. The main outcome was age-stratified rates of receiving a CT scan...
November 16, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/29143352/assessment-of-exposure-to-radio-frequency-electromagnetic-fields-from-smart-utility-meters-in-gb-part-ii-numerical-assessment-of-induced-sar-within-the-human-body
#3
Muhammad R A Qureshi, Yasir Alfadhl, Xiaodong Chen, Azadeh Peyman, Myron Maslanyj, Simon Mann
Human body exposure to radiofrequency electromagnetic waves emitted from smart meters was assessed using various exposure configurations. Specific energy absorption rate distributions were determined using three anatomically realistic human models. Each model was assigned with age- and frequency-dependent dielectric properties representing a collection of age groups. Generalized exposure conditions involving standing and sleeping postures were assessed for a home area network operating at 868 and 2,450 MHz...
November 16, 2017: Bioelectromagnetics
https://www.readbyqxmd.com/read/29142345/in-vitro-protective-effect-of-rutin-and-quercetin-against-radiation-induced-genetic-damage-in-human-lymphocytes
#4
Shrikant L Patil, K Swaroop, Nilesh Kakde, H M Somashekarappa
Purpose of the Study: Rutin (RUT) and quercetin (QRT) which are dietary compounds were investigated for their ability to protect against ionizing radiation (IR)-induced genotoxicity in human lymphocytes. Materials and Methods: The radiation antagonistic potential of RUT and QRT was assessed by alkaline comet and cytokinesis-block micronucleus (CBMN) assay. Results: Treatment of lymphocytes with RUT and QRT (25 μg/ml) prior exposure to 2 Gy gamma radiation resulted in a significant reduction of frequency of micronuclei as compared to the control set of cells evaluated by CBMN assay...
October 2017: Indian Journal of Nuclear Medicine: IJNM: the Official Journal of the Society of Nuclear Medicine, India
https://www.readbyqxmd.com/read/29141157/the-devastating-effect-of-exposure-to-high-irradiation-dose-on-liver-and-the-performance-of-synthesized-nano-hap-in-relieve-the-associated-symptoms-in-rats
#5
Eman Ismail Gheriany, Sameh A Awwad
Ionizing radiation is one of the environmental factors that may contribute to liver dysfunction by a mechanism involving oxidative stress. The present investigation was undertaken to study the possible therapeutic effect of nano-HAp on whole body gamma irradiation induced hepatotoxicity in rats. The study consisted of three groups of 10 rats each. Group 1 (control), whereas group 2 received a single dose of γ-radiation (10Gy). The animals in groups 3 was treated with nano-HAp (100 mg/kg b.w.) once / week for three weeks starting in the next day of γ radiation...
November 15, 2017: Biochemistry and Cell Biology, Biochimie et Biologie Cellulaire
https://www.readbyqxmd.com/read/29131990/non-thermal-near-infrared-exposure-photobiomodulates-cellular-responses-to-ionizing-radiation-in-human-full-thickness-skin-models
#6
Anke König, Nadja Zöller, Stefan Kippenberger, August Bernd, Roland Kaufmann, Paul G Layer, Anja Heselich
Ionizing and near-infrared radiation are both part of the therapeutic spectrum in cancer treatment. During cancer therapy ionizing radiation is typically used for non-invasive reduction of malignant tissue, while near-infrared photobiomodulation is utilized in palliative medical approaches, e.g. for pain reduction or impairment of wound healing. Furthermore, near-infrared is part of the solar wavelength spectrum. A combined exposure of these two irradiation qualities - either intentionally during medical treatment or unintentionally due to solar exposure - is therefore presumable for cancer patients...
November 10, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29131764/nongynecologic-findings-seen-at-pelvic-us
#7
Akram M Shaaban, Maryam Rezvani, Jeffrey D Olpin, Anne M Kennedy, Ayman H Gaballah, Bryan R Foster, Christine O Menias, Khaled M Elsayes
Ultrasonography (US) is frequently the first imaging modality used to examine women with symptoms involving the pelvis. It is widely available and involves no exposure to ionizing radiation. Images can be acquired with a transabdominal, endovaginal, or translabial approach, and the use of video clips and three-dimensional reconstructions can be helpful. US is excellent for assessment of the uterus, ovaries, and adnexa. Occasionally, nongynecologic pelvic diseases arising from the gastrointestinal, genitourinary, and musculoskeletal systems and the pelvic peritoneal and extraperitoneal spaces may be detected and can be a source of diagnostic dilemma...
November 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/29121966/radioprotective-agents-to-prevent-cellular-damage-due-to-ionizing-radiation
#8
REVIEW
Tyler A Smith, Daniel R Kirkpatrick, Sean Smith, Trevor K Smith, Tate Pearson, Aparna Kailasam, Kortney Z Herrmann, Johanna Schubert, Devendra K Agrawal
Medical imaging has become a central component of patient care to ensure early and accurate diagnosis. Unfortunately, many imaging modalities use ionizing radiation to generate images. Ionizing radiation even in low doses can cause direct DNA damage and generate reactive oxygen species and free radicals, leading to DNA, protein, and lipid membrane damage. This cell damage can lead to apoptosis, necrosis, teratogenesis, or carcinogenesis. As many as 2% of cancers (and an associated 15,000 deaths annually) can be linked to computed tomography exposure alone...
November 9, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/29116015/how-we-read-pediatric-pet-ct-indications-and-strategies-for-image-acquisition-interpretation-and-reporting
#9
REVIEW
Gabrielle C Colleran, Neha Kwatra, Leah Oberg, Frederick D Grant, Laura Drubach, Michael J Callahan, Robert D MacDougall, Frederic H Fahey, Stephan D Voss
PET/CT plays an important role in the diagnosis, staging and management of many pediatric malignancies. The techniques for performing PET/CT examinations in children have evolved, with increasing attention focused on reducing patient exposure to ionizing radiation dose whenever possible and minimizing scan duration and sedation times, with a goal toward optimizing the overall patient experience. This review outlines our approach to performing PET/CT, including a discussion of the indications for a PET/CT exam, approaches for optimizing the exam protocol, and a review of different approaches for acquiring the CT portion of the PET/CT exam...
November 7, 2017: Cancer Imaging: the Official Publication of the International Cancer Imaging Society
https://www.readbyqxmd.com/read/29113972/localized-synchrotron-irradiation-of-mouse-skin-induces-persistent-systemic-genotoxic-and-immune-responses
#10
Jessica Ventura, Pavel N Lobachevsky, Jason S Palazzolo, Helen Forrester, Nicole M Haynes, Alesia Ivashkevich, Andrew W Stevenson, Christopher J Hall, Andreas Ntargaras, Vasilis Kotsaris, Gerasimos Ch Pollakis, Gianna Potsi, Konstantinos Skordylis, Georgia Terzoudi, Ioannis S Pateras, Vassilis G Gorgoulis, Alexandros G Georgakilas, Carl N Sprung, Olga A Martin
The importance of nontargeted (systemic) effects of ionizing radiation is attracting increasing attention. Exploiting synchrotron radiation generated by the Imaging and Medical Beamline at the Australian Synchrotron, we studied radiation-induced nontargeted effects in C57BL/6 mice. Mice were locally irradiated with a synchrotron X-ray broad beam and a multiplanar microbeam radiotherapy beam. To assess the influence of the beam configurations and variations in peak dose and irradiated area in the response of normal tissues outside the irradiated field at 1 and 4 days after irradiation, we monitored oxidatively induced clustered DNA lesions (OCDL), DNA double-strand breaks (DSB), apoptosis, and the local and systemic immune responses...
November 7, 2017: Cancer Research
https://www.readbyqxmd.com/read/29111198/cumulative-effective-dose-and-cancer-risk-of-pediatric-population-in-repetitive-whole-body-scan-using-dual-energy-x-ray-absorptiometry
#11
Martin Law, Wang-Kei Ma, Eva Chan, Candy Mui, Vivian Ma, Wai-Yin Ho, Lawrance Yip, Wendy Lam
This study aims to quantitatively evaluate the cumulative effective dose and associated cancer risk of pediatric patients of US and Hong Kong population undergoing repetitive whole-body scans with dual-energy X-ray absorptiometry (DXA) during their diagnosis and follow-up periods. Organ-absorbed doses of pediatric patients undergoing DXA whole-body scan have been computer simulated using patient imaging parameters input to the Monte Carlo software PCXMC. Gender- and age-specific effective doses have been calculated with the simulated organ-absorbed doses using the ICRP-103 approach...
September 29, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/29108237/the-circrna-interactome-innovative-hallmarks-of-the-intra-and-extracellular-radiation-response
#12
Valerie Bríd O'Leary, Jan Smida, Martina Matjanovski, Corinna Brockhaus, Klaudia Winkler, Simone Moertl, Saak Victor Ovsepian, Michael John Atkinson
Generated by Quaking (QKI), circular RNAs (circRNAs) are newly recognised non-coding RNA (ncRNA) members characterised by tissue specificity, increased stability and enrichment within exosomes. Studies have shown that ionizing radiation (IR) can influence ncRNA transcription. However, it is unknown whether circRNAs or indeed QKI are regulated by IR. Microarray circRNA profiling and next generation sequencing revealed that circRNA expression was altered by low and medium dose exposure sourced predominantly from genes influencing the p53 pathway...
October 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29104487/ier5-is-involved-in-dna-double-strand-breaks-repair-in-association-with-papr1-in-hela-cells
#13
Xin-Ping Yu, Yu-Mei Wu, Yang Liu, Ming Tian, Jian-Dong Wang, Ku-Ke Ding, Teng Ma, Ping-Kun Zhou
The immediate early response gene 5 (IER5) is a radiation response gene induced in a dose-independent manner, and has been suggested to be a molecular biomarker for biodosimetry purposes upon radiation exposure. Here, we investigated the function of IER5 in DNA damage response and repair. We found that interference on IER5 expression significantly decreased the efficiency of repair of DNA double-strand breaks induced by ionizing radiations in Hela cells. We found that IER5 participates in the non-homologous end-joining pathway of DNA breaks repair...
2017: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/29104287/risk-of-developing-chronic-myeloid-neoplasms-in-well-differentiated-thyroid-cancer-patients-treated-with-radioactive-iodine
#14
R J Molenaar, C Pleyer, T Radivoyevitch, S Sidana, A Godley, A S Advani, A T Gerds, H E Carraway, M Kalaycio, A Nazha, D Adelstein, C Nasr, D Angelini, J P Maciejewski, N Majhail, M A Sekeres, S Mukherjee
Exposure to ionizing radiation increases the risk of myelodysplastic syndromes (MDS) and myeloproliferative neoplasms (MPN), but such risks are not known in well-differentiated thyroid cancer (WDTC) patients treated with radioactive iodine (RAI). A total of 148 215 WDTC patients were identified from Surveillance Epidemiology and End Results (SEER) registries between 1973 and 2014, of whom 54% underwent definitive thyroidectomy and 46% received adjuvant RAI. With a median follow-up of 6.6 years, 77 and 66 WDTC patients developed MDS and MPN, respectively...
November 6, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/29103466/evaluation-of-cumulative-effective-dose-and-cancer-risk-from-repetitive-full-spine-imaging-using-eos-system-impact-to-adolescent-patients-of-different-populations
#15
Martin Law, Wang-Kei Ma, Eva Chan, Damian Lau, Candy Mui, Kenneth Cheung, Lawrance Yip, Wendy Lam
OBJECTIVE: To evaluate the effective dose and associated cancer risk using EOS system for scoliotic adolescent patients undergoing full spine imaging at different age of exposure; to demonstrate EOS system capable of delivering less radiation dose and hence of reducing cancer risk induction when compared with conventional digital X-ray systems; to obtain cumulative effective dose and cancer risk for both genders scoliotic adolescence of US and Hong Kong population. METHODS: Organ absorbed doses of full spine exposed scoliotic adolescent patients using EOS system have been simulated with the use of patient imaging parameters input to the Monte Carlo software PCXMC...
November 2017: European Journal of Radiology
https://www.readbyqxmd.com/read/29101721/restoration-of-cognitive-performance-in-mice-carrying-a-deficient-allele-of-8-oxoguanine-dna-glycosylase-by-x-ray-irradiation
#16
Tim Hofer, Nur Duale, Martine Muusse, Dag Marcus Eide, Hildegunn Dahl, Fernando Boix, Jannike M Andersen, Ann Karin Olsen, Oddvar Myhre
Environmental stressors inducing oxidative stress such as ionizing radiation may influence cognitive function and neuronal plasticity. Recent studies have shown that transgenic mice deficient of DNA glycosylases display unexpected cognitive deficiencies related to changes in gene expression in the hippocampus. The main objectives of the present study were to determine learning and memory performance in C57BL/6NTac 8-oxoguanine DNA glycosylase 1 (Ogg1)(+/-) (heterozygote) and Ogg1(+/+) (wild type, WT) mice, to study whether a single acute X-ray challenge (0...
November 3, 2017: Neurotoxicity Research
https://www.readbyqxmd.com/read/29100884/physician-knowledge-of-radiation-exposure-and-risk-in-medical-imaging
#17
Jason B Hobbs, Noah Goldstein, Kimberly E Lind, Deirdre Elder, Gerald D Dodd, James P Borgstede
PURPOSE: Medical imaging is an increasingly important source of radiation exposure for the general population, and there are risks associated with such exposure; however, recent studies have demonstrated poor understanding of medical radiation among various groups of health care providers. This study had two aims: (1) analyze physicians' knowledge of radiation exposure and risk in diagnostic imaging across multiple specialties and levels of training, and (2) assess the effectiveness of a brief educational presentation on improving physicians' knowledge...
November 1, 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/29099268/atm-mediated-mitochondrial-damage-response-triggered-by-nuclear-dna-damage-in-normal-human-lung-fibroblasts
#18
Tsutomu Shimura, Megumi Sasatani, Hidehiko Kawai, Kenji Kamiya, Junya Kobayashi, Kenshi Komatsu, Naoki Kunugita
Ionizing radiation (IR) elevates mitochondrial oxidative phosphorylation (OXPHOS) in response to the energy requirement for DNA damage responses. Reactive oxygen species (ROS) released during mitochondrial OXPHOS may cause oxidative damage to mitochondria in irradiated cells. In this paper, we investigated the association between nuclear DNA damage and mitochondrial damage following IR in normal human lung fibroblasts. In contrast to low-doses of acute single radiation, continuous exposure of chronic radiation or long-term exposure of fractionated radiation (FR) induced persistent Rad51 and γ-H2AX foci at least 24 hours after IR in irradiated cells...
November 3, 2017: Cell Cycle
https://www.readbyqxmd.com/read/29098707/the-cancer-risk-associated-with-residential-exposure-to-soil-containing-radioactive-coal-combustion-residuals
#19
Kevin M Towle, Neva F B Jacobs, James J Keenan, Andrew D Monnot
Coal combustion residuals (CCRs) are composed of various constituents, including radioactive materials. The objective of this study was to utilize methodology on radionuclide risk assessment from the Environmental Protection Agency (EPA) to estimate the potential cancer risks associated with residential exposure to CCR-containing soil. We evaluated potential radionuclide exposure via soil ingestion, inhalation of soil particulates, and external exposure to ionizing radiation using published CCR radioactivity values for (232) Th, (228) Ra, (238) U, and (226) Ra from the Appalachia, Illinois, and Powder River coal basins...
November 3, 2017: Risk Analysis: An Official Publication of the Society for Risk Analysis
https://www.readbyqxmd.com/read/29098004/predicted-cold-shock-proteins-from-the-extremophilic-bacterium-deinococcus-maricopensis-and-related-deinococcus-species
#20
Michael J LaGier
While many studies have examined the mechanisms by which extremophilic Deinococci survive exposure to ionizing radiation, very few publications have characterized the cold shock adaptations of this group, despite many species being found in persistent cold environments and environments prone to significant daily temperature fluctuations. Bacterial cold shock proteins (Csps) are a family of conserved, RNA chaperone proteins that commonly play a role in cold temperature adaptation, including a downward shift in temperature (i...
2017: International Journal of Microbiology
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