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https://www.readbyqxmd.com/read/28350698/gamma-ray-dose-from-an-overhead-plume
#1
Michael W McNaughton, Jessica M Gillis, Elizabeth Ruedig, Jeffrey J Whicker, David P Fuehne
Standard plume models can underestimate the gamma-ray dose when most of the radioactive material is above the heads of the receptors. Typically, a model is used to calculate the air concentration at the height of the receptor, and the dose is calculated by multiplying the air concentration by a concentration-to-dose conversion factor. Models indicate that if the plume is emitted from a stack during stable atmospheric conditions, the lower edges of the plume may not reach the ground, in which case both the ground-level concentration and the dose are usually reported as zero...
May 2017: Health Physics
https://www.readbyqxmd.com/read/28350547/assessment-of-vectorial-total-variation-penalties-on-realistic-dual-energy-ct-data
#2
David S Rigie, Adrian A Sanchez, Patrick J La Rivière
Vectorial extensions of total variation have recently been developed for regularizing the reconstruction and denoising of multi-channel images, such as those arising in spectral computed tomography. Early studies have focused mainly on simulated, piecewise-constant images whose structure may favor total-variation penalties. In the current manuscript, we apply vectorial total variation to real dual-energy CT data of a whole turkey in order to determine if the same benefits can be observed in more complex images with anatomically realistic textures...
April 21, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28346912/optimizing-the-dose-of-erythropoietin-required-to-prevent-acute-ventilation-induced-cerebral-white-matter-injury-in-preterm-lambs
#3
Kyra Y Y Chan, Domenic A LaRosa, Mary Tolcos, Anqi Li, Valerie A Zahra, Graeme R Polglase, Samantha K Barton
Erythropoietin (EPO) is being trialed in preterm neonates for neuroprotection. We have recently demonstrated that a single high bolus dose (5,000 IU/kg) of recombinant human EPO amplified preterm lung and brain ventilation-induced injury. We aimed to determine the optimal dose of EPO to reduce ventilation-induced cerebral white matter inflammation and injury in preterm lambs. Lambs (0.85 gestation) were ventilated with an injurious strategy for 15 min followed by conventional ventilation for 105 min. Lambs were randomized to no treatment (VENT; n = 8) or received a bolus dose of EPO (EPREX®): 300 IU/kg (EPO 300; n = 5), 1,000 IU/kg (EPO 1,000; n = 5), or 3,000 IU/kg (EPO 3,000; n = 5)...
March 28, 2017: Developmental Neuroscience
https://www.readbyqxmd.com/read/28346387/oprm1-c-118a-g-polymorphism-and-duration-of-morphine-treatment-associated-with-morphine-doses-and-quality-of-life-in-palliative-cancer-pain-settings
#4
Aline Hajj, Lucine Halepian, Nada El Osta, Georges Chahine, Joseph Kattan, Lydia Rabbaa Khabbaz
Despite increased attention on assessment and management, pain remains the most persistent symptom in patients with cancer, in particular in end-of-life settings, with detrimental impact on their quality-of-life (QOL). We conducted this study to evaluate the added value of determining some genetic and non-genetic factors to optimize cancer pain treatment. Eighty-nine patients were included in the study for the evaluation of palliative cancer pain management. The regression analysis showed that age, OPRM1 single nucleotide polymorphism (SNP), as well as the duration of morphine treatment were significantly associated with morphine doses at 24 h (given by infusion pump; p = 0...
March 27, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28346241/hemodynamic-responses-to-magnetic-stimulation-of-carotid-sinus-in-normotensive-rabbits
#5
Jun Zhang, Qinqin Cao, Rongrong Li, Jingze Hu, Jiafei Dai, Hao Zhang, Huaiming Wang, Fang Yang, Ruidong Ye, Xinfeng Liu, Gelin Xu
OBJECTIVES: Carotid baroreflex plays a crucial role in regulating arterial pressure. Based on this knowledge, electrical stimulation of carotid sinus was designed for treating resistant hypertension. However, the clinical implication of electrical stimulation of carotid sinus is largely restrained due to obvious invasiveness. This study aimed to evaluate the efficacy of magnetic stimulation of carotid sinus (MSCS), a noninvasive strategy, for lowering blood pressure in rabbits. METHODS: MSCS with graded intensities and frequencies were systematically attempted in normotensive rabbits...
March 24, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28346056/alcohol-and-drug-use-and-aberrant-drug-related-behavior-among-patients-on-chronic-opioid-therapy
#6
Cynthia I Campbell, Andrea H Kline-Simon, Michael Von Korff, Kathleen W Saunders, Constance Weisner
OBJECTIVE: To better identify individuals on chronic opioid therapy (COT) at high risk for aberrant-drug related behavior (ADRB). We examine whether patients with low level alcohol and drug use have similar characteristics to those with alcohol and drug disorders. We then examined the relationship of alcohol and drug use to ADRBs among COT patients. METHODS: The sample was 972 randomly selected COT patients (age 21-80 years old) from a large health system in Northern California, USA, and interviewed in 2009...
March 27, 2017: Substance Use & Misuse
https://www.readbyqxmd.com/read/28346025/guidance-on-radiation-dose-limits-for-the-lens-of-the-eye-overview-of-the-recommendations-in-ncrp-commentary-no-26
#7
Lawrence T Dauer, Elizabeth A Ainsbury, Joseph Dynlacht, David Hoel, Barbara E K Klein, Don Mayer, Christina R Prescott, Raymond H Thornton, Eliseo Vano, Gayle E Woloschak, Cynthia M Flannery, Lee E Goldstein, Nobuyuki Hamada, Phung K Tran, Michael P Grissom, Eleanor A Blakely
PURPOSE: This review summarizes the conclusions and recommendations of the new NCRP Commentary No. 26 guidance on radiation dose limits for the lens of the eye. The NCRP also addressed radiation protection principles with respect to the lens of the eye, discussed the current understanding of eye biology and lens effects, reviewed and evaluated epidemiology, and assessed exposed populations with the potential for significant radiation exposures to the lens while suggesting monitoring and protection practices...
March 27, 2017: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/28345833/efficacy-and-toxicity-of-low-dose-versus-conventional-dose-chemotherapy-for-malignant-tumors-a-meta-analysis-of-6-randomized-controlled-trials
#8
Xianhe Xie, Yupeng Wu, Shuimei Luo, Haitao Yang, Lina Li, Sijing Zhou, Ruifen Shen, Heng Lin
Low-dose chemotherapy has emerged as a new strategy for control of cancer. However, there is a controversy as to whether low-dose chemotherapy is an effective way to manage many human malignancies. To shed light on this controversy, we performed a meta-analysis of relative merits between low-dose and conventional-dose chemotherapy in different carcinomas. Studies published before February 29, 2016 were reviewed for the meta-analysis and selected according to defined criteria. The effect levels of low-dose chemotherapy regarding overall survival (OS), progression-free survival (PFS) and severe adverse events (SAEs) (Grade≥3) were calculated as risk ratios (ORs) or adjusted hazard ratios (HRs)...
February 1, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
https://www.readbyqxmd.com/read/28345769/best-practice-policy-statement-on-urodynamic-antibiotic-prophylaxis-in-the-non-index-patient
#9
REVIEW
Anne P Cameron, Lysanne Campeau, Benjamin M Brucker, J Quentin Clemens, Gregory T Bales, Michael E Albo, Michael J Kennelly
AIMS: Antibiotic prophylaxis before urodynamic testing (UDS) is widely utilized to prevent urinary tract infection (UTI) with only limited guidance. The Society of Urodynamics, Female Pelvic Medicine, and Urogenital Reconstruction (SUFU) convened a Best Practice Policy Panel to formulate recommendations on the urodynamic antibiotic prophylaxis in the non-index patient. METHODS: Recommendations are based on a literature review and the Panel's expert opinion, with all recommendations graded using the Oxford grading system...
March 27, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28345547/contrast-dose-and-radiation-dose-reduction-in-abdominal-enhanced-computerized-tomography-scans-with-single-phase-dual-energy-spectral-computerized-tomography-mode-for-children-with-solid-tumors
#10
Tong Yu, Jun Gao, Zhi-Min Liu, Qi-Feng Zhang, Yong Liu, Ling Jiang, Yun Peng
BACKGROUND: Contrast dose and radiation dose reduction in computerized tomography (CT) scan for adult has been explored successfully, but there have been few studies on the application of low-concentration contrast in pediatric abdominal CT examinations. This was a feasibility study on the use of dual-energy spectral imaging and adaptive statistical iterative reconstruction (ASiR) for the reduction of radiation dose and iodine contrast dose in pediatric abdominal CT patients with solid tumors...
April 5, 2017: Chinese Medical Journal
https://www.readbyqxmd.com/read/28345489/primary-culture-of-human-cumulus-cells-requires-stearoyl-coenzyme-a-desaturase-1-activity-for-steroidogenesis-and-enhancing-oocyte-in-vitro-maturation
#11
Shabnam Fayezi, Marefat Ghaffari Novin, Masoud Darabi, Mohsen Norouzian, Mohammad Nouri, Laya Farzadi, Maryam Darabi
Stearoyl-coenzyme A desaturase 1 (SCD1) is a key enzyme in lipid metabolism and is expressed in cumulus cells. The objective of the present study was to evaluate the effect of SCD1 inhibition in human cumulus cells on triglyceride content, steroidogenesis, and oocyte in vitro maturation. Human cumulus cells were exposed to SCD1 inhibitor CAY10566 (SCDinhib) alone or in combination with oleic acid in primary culture. The SCDinhib markedly suppressed triglyceride accumulation (-47%, P = .01), aromatase gene expression (-36%, P = ...
January 1, 2017: Reproductive Sciences
https://www.readbyqxmd.com/read/28345444/budgetary-impact-of-cabazitaxel-use-after-docetaxel-treatment-for-metastatic-castration-resistant-prostate-cancer
#12
Kyle Flannery, Ed Drea, Louis Hudspeth, Shelby Corman, Xin Gao, Mei Xue, Raymond Miao
BACKGROUND: With the approval of several new treatments for metastatic castration-resistant prostate cancer (mCRPC), budgetary impact is a concern for health plan decision makers. Budget impact models (BIMs) are becoming a requirement in many countries as part of formulary approval or reimbursement decisions. Cabazitaxel is a second-generation taxane developed to overcome resistance to docetaxel and is approved for the treatment of patients with mCRPC previously treated with a docetaxel-containing regimen...
April 2017: Journal of Managed Care & Specialty Pharmacy
https://www.readbyqxmd.com/read/28345437/clinical-profile-dosing-and-quality-of-life-outcomes-in-primary-immune-deficiency-patients-treated-at-home-with-immunoglobulin-g-data-from-the-ideal-patient-registry
#13
Sean Kearns, Loretta Kristofek, William Bolgar, Luqman Seidu, Samantha Kile
BACKGROUND: Patients with primary immune deficiency (PID) often require immunoglobulin G (IgG, commonly referred to as Ig) replacement therapy to prevent infections and associated comorbidities. Ig therapy can be given either through intravenous or subcutaneous routes, and both can be done in the home setting. There is limited information available on the real-world diagnosis, management, and outcomes of this patient population, given the variable disease presentation and treatment options...
April 2017: Journal of Managed Care & Specialty Pharmacy
https://www.readbyqxmd.com/read/28345299/a-prospective-study-of-health-related-quality-of-life-of-boys-with-severe-haemophilia-a-in-china-comparing-on-demand-to-prophylaxis-treatment
#14
R Wu, J Sun, J Xiao, Y Liu, F Xue, H Wang, L Tang, Y Zhao, K Li, R Yang, Y Hu, K-H Luke, M-C Poon, V S Blanchette, K Usuba, N L Young
INTRODUCTION: Treatment for boys with haemophilia in China is rapidly improving; however, comprehensive outcomes have not been examined prospectively. AIM: The aim of this study was to evaluate the effect of short-term full-dose prophylaxis compared to on-demand treatment, on the Health-Related Quality of Life (HR-QoL) of boys with severe haemophilia A (HA) in China. METHODS: Boys with severe HA (FVIII<1%) completed 3 months of on-demand treatment and 3 months of full-dose prophylaxis (25 FVIII IU per kg 3x per week)...
March 27, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28345174/overall-evaluability-of-low-dose-protocol-for-computed-tomography-angiography-of-thoracic-aorta-using-80%C3%A2-kv-and-iterative-reconstruction-algorithm-using-different-concentration-contrast-media
#15
Andrea Daniele Annoni, Maria E Mancini, Daniele Andreini, Alberto Formenti, Saima Mushtaq, Enrica Nobili, Marco Guglielmo, Andrea Baggiano, Edoardo Conte, Mauro Pepi
INTRODUCTION: Multidetector Computed Tomography Angiography (MDCTA) is presently the imaging modality of choice for aortic disease. However, the effective radiation dose and the risk related to the use of contrast agents associated with MDCTA is an issue of concern. Aim of this study was to assess image quality of a low dose ECG-gated MDCTA of thoracic aorta using different concentration contrast media without tailored injection protocol. METHODS: Two-hundred patients were randomised into four different scan protocols: Group A (Iodixanol 320 and 80 Kvp tube voltage), Group B (Iodixanol 320 and 100 Kvp tube voltage), Group C (Iomeprol 400 and 80 Kvp tube voltage) and Group D (Iomeprol 400 and 100 Kvp tube voltage)...
March 27, 2017: Journal of Medical Imaging and Radiation Oncology
https://www.readbyqxmd.com/read/28345025/optimization-of-a-neural-stem-cell-mediated-carboxylesterase-irinotecan-gene-therapy-for-metastatic-neuroblastoma
#16
Margarita Gutova, Leanne Goldstein, Marianne Metz, Anahit Hovsepyan, Lyudmila G Tsurkan, Revathiswari Tirughana, Lusine Tsaturyan, Alexander J Annala, Timothy W Synold, Zesheng Wan, Robert Seeger, Clarke Anderson, Rex A Moats, Philip M Potter, Karen S Aboody
Despite improved survival for children with newly diagnosed neuroblastoma (NB), recurrent disease is a significant problem, with treatment options limited by anti-tumor efficacy, patient drug tolerance, and cumulative toxicity. We previously demonstrated that neural stem cells (NSCs) expressing a modified rabbit carboxylesterase (rCE) can distribute to metastatic NB tumor foci in multiple organs in mice and convert the prodrug irinotecan (CPT-11) to the 1,000-fold more toxic topoisomerase-1 inhibitor SN-38, resulting in significant therapeutic efficacy...
March 17, 2017: Molecular Therapy Oncolytics
https://www.readbyqxmd.com/read/28344998/low-dose-liver-targeted-gene-therapy-for-pompe-disease-enhances-therapeutic-efficacy-of-ert-via-immune-tolerance-induction
#17
Sang-Oh Han, Giuseppe Ronzitti, Benjamin Arnson, Christian Leborgne, Songtao Li, Federico Mingozzi, Dwight Koeberl
Pompe disease results from acid α-glucosidase (GAA) deficiency, and enzyme replacement therapy (ERT) with recombinant human (rh) GAA has clinical benefits, although its limitations include the short half-life of GAA and the formation of antibody responses. The present study compared the efficacy of ERT against gene transfer with an adeno-associated viral (AAV) vector containing a liver-specific promoter. GAA knockout (KO) mice were administered either a weekly injection of rhGAA (20 mg/kg) or a single injection of AAV2/8-LSPhGAA (8 × 10(11) vector genomes [vg]/kg)...
March 17, 2017: Molecular Therapy. Methods & Clinical Development
https://www.readbyqxmd.com/read/28344686/comparison-of-image-quality-diagnostic-accuracy-and-radiation-dose-between-flash-model-and-retrospective-ecg-triggered-protocols-in-dual-source-computed-tomography-dsct-in-congenital-heart-diseases
#18
Rong Wang, Xiang-Jiu Xu, Gang Huang, Xing Zhou, Wen-Wen Zhang, Ya-Qiong Ma, Xiao-Na Zuo
BACKGROUND: Dual source computed tomography (DSCT) plays an important role in the diagnosis of congenital heart diseases (CHD). However, the issue of radiation-related side effects constitutes a wide public concern. The aim of the study was to explore the differences in diagnostic accuracy, radiation dose and image quality between a prospectively ECG - triggered high - pitch spiral acquisition (flash model) and a retrospective ECG-gated protocol of DSCT used for the detection of CHD. MATERIAL/METHODS: The study included 58 patients with CHD who underwent a DSCT examination, including two groups of 29 patients in each protocol...
2017: Polish Journal of Radiology
https://www.readbyqxmd.com/read/28344604/3d-image-based-adapted-high-dose-rate-brachytherapy-in-cervical-cancer-with-and-without-interstitial-needles-measurement-of-applicator-shift-between-imaging-and-dose-delivery
#19
Leif Karlsson, Per Thunberg, Anders With, Louise Bohr Mordhorst, Jan Persliden
PURPOSE: Using 3D image-guided adaptive brachytherapy for cervical cancer treatment, it often means that patients are transported and moved during the treatment procedure. The purpose of this study was to determine the intra-fractional longitudinal applicator shift in relation to the high risk clinical target volume (HR-CTV) by comparing geometries at imaging and dose delivery for patients with and without needles. MATERIAL AND METHODS: Measurements were performed in 33 patients (71 fractions), where 25 fractions were without and 46 were with interstitial needles...
February 2017: Journal of Contemporary Brachytherapy
https://www.readbyqxmd.com/read/28344017/intranasal-delivery-of-n-terminal-modified-leptin-pluronic-conjugate-for-treatment-of-obesity
#20
Dongfen Yuan, Xiang Yi, Yuling Zhao, Chi-Duen Poon, Kristin M Bullock, Kim M Hansen, Therese S Salameh, Susan A Farr, William A Banks, Alexander V Kabanov
Leptin is an adipocyte-secreted hormone that is delivered via a specific transport system across the blood-brain barrier (BBB) to the brain where it acts on the hypothalamus receptors to control appetite and thermogenesis. Peripheral resistance to leptin due to its impaired brain delivery prevents therapeutic use of leptin in overweight and moderately obese patients. To address this problem, we modified the N-terminal amine of leptin with Pluronic P85 (LepNP85) and administered this conjugate intranasally using the nose-to-brain (INB) route to bypass the BBB...
March 23, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
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