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https://www.readbyqxmd.com/read/28108101/development-of-a-high-resolution-voxelised-head-phantom-for-medical-physics-applications
#1
REVIEW
V Giacometti, S Guatelli, M Bazalova-Carter, A B Rosenfeld, R W Schulte
Computational anthropomorphic phantoms have become an important investigation tool for medical imaging and dosimetry for radiotherapy and radiation protection. The development of computational phantoms with realistic anatomical features contribute significantly to the development of novel methods in medical physics. For many applications, it is desirable that such computational phantoms have a real-world physical counterpart in order to verify the obtained results. In this work, we report the development of a voxelised phantom, the HIGH_RES_HEAD, modelling a paediatric head based on the commercial phantom 715-HN (CIRS)...
January 17, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28107554/inclusion-of-a-variable-rbe-into-proton-and-photon-plan-comparison-for-various-fractionation-schedules-in-prostate-radiation-therapy
#2
Jakob Ödén, Kjell Eriksson, Iuliana Toma-Dasu
PURPOSE: A constant relative biological effectiveness (RBE) of 1.1 is currently used in proton radiation therapy to account for the increased biological effectiveness compared to photon therapy. However, there is increasing evidence that proton RBE vary with the linear energy transfer (LET), the dose per fraction and the type of the tissue. Therefore, this study aims to evaluate the impact of disregarding variations in RBE when comparing proton and photon dose plans for prostate treatments for various fractionation schedules using published RBE models and several α/β assumptions...
January 20, 2017: Medical Physics
https://www.readbyqxmd.com/read/28107371/sexual-reproductive-health-needs-and-rights-of-young-people-in-slum-areas-of-kampala-uganda-a-cross-sectional-study
#3
Andre M N Renzaho, Joseph K Kamara, Nichole Georgeou, Gilbert Kamanga
BACKGROUND: Young people in Uganda face various sexual and reproductive health risks, especially those living in urban slums. The aim of this study was to examine factors associated with comprehensive categories of sexual and reproductive health, including sexual behaviours; sexual education and access to contraceptive services; family planning; prevention of STDs; sexual consent as a right; gender based violence; as well as HIV testing, counselling, disclosure and support. METHODS: The study was cross-sectional in design and was carried out in July 2014 in Makindye and Nakawa Divisions of Kampala City, Uganda...
2017: PloS One
https://www.readbyqxmd.com/read/28107350/maternal-and-newborn-health-in-karnataka-state-india-the-community-level-interventions-for-pre-eclampsia-clip-trial-s-baseline-study-results
#4
Mrutynjaya B Bellad, Marianne Vidler, Narayan V Honnungar, Ashalata Mallapur, Umesh Ramadurg, Umesh Charanthimath, Geetanjali Katageri, Shashidhar Bannale, Avinash Kavi, Chandrashekhar Karadiguddi, Sumedha Sharma, Tang Lee, Jing Li, Beth Payne, Laura Magee, Peter von Dadelszen, Richard Derman, Shivaprasad S Goudar
Existing vital health statistics registries in India have been unable to provide reliable estimates of maternal and newborn mortality and morbidity, and region-specific health estimates are essential to the planning and monitoring of health interventions. This study was designed to assess baseline rates as the precursor to a community-based cluster randomized control trial (cRCT)-Community Level Interventions for Pre-eclampsia (CLIP) Trial (NCT01911494; CTRI/2014/01/004352). The objective was to describe baseline demographics and health outcomes prior to initiation of the CLIP trial and to improve knowledge of population-level health, in particular of maternal and neonatal outcomes related to hypertensive disorders of pregnancy, in northern districts the state of Karnataka, India...
2017: PloS One
https://www.readbyqxmd.com/read/28106048/simulating-the-hydrologic-cycle-in-coal-mining-subsidence-areas-with-a-distributed-hydrologic-model
#5
Jianhua Wang, Chuiyu Lu, Qingyan Sun, Weihua Xiao, Guoliang Cao, Hui Li, Lingjia Yan, Bo Zhang
Large-scale ground subsidence caused by coal mining and subsequent water-filling leads to serious environmental problems and economic losses, especially in plains with a high phreatic water level. Clarifying the hydrologic cycle in subsidence areas has important practical value for environmental remediation, and provides a scientific basis for water resource development and utilisation of the subsidence areas. Here we present a simulation approach to describe interactions between subsidence area water (SW) and several hydrologic factors from the River-Subsidence-Groundwater Model (RSGM), which is developed based on the distributed hydrologic model...
January 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28105886/interobserver-delineation-uncertainty-in-involved-node-radiation-therapy-inrt-for-early-stage-hodgkin-lymphoma-on-behalf-of-the-radiotherapy-committee-of-the-eortc-lymphoma-group
#6
Marianne C Aznar, Theodore Girinsky, Anne Kiil Berthelsen, Berthe Aleman, Max Beijert, Martin Hutchings, Yolande Lievens, Paul Meijnders, Peter Meidahl Petersen, Deborah Schut, Maja V Maraldo, Richard van der Maazen, Lena Specht
BACKGROUND AND PURPOSE: In early-stage classical Hodgkin lymphoma (HL) the target volume nowadays consists of the volume of the originally involved nodes. Delineation of this volume on a post-chemotherapy CT-scan is challenging. We report on the interobserver variability in target volume definition and its impact on resulting treatment plans. MATERIALS AND METHODS: Two representative cases were selected (1: male, stage IB, localization: left axilla; 2: female, stage IIB, localizations: mediastinum and bilateral neck)...
January 20, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/28105593/monitoring-pharmaceuticals-and-personal-care-products-in-reservoir-water-used-for-drinking-water-supply
#7
Carolina Aristizabal-Ciro, Ana María Botero-Coy, Francisco J López, Gustavo A Peñuela
In this work, the presence of selected emerging contaminants has been investigated in two reservoirs, La Fe (LF) and Rio Grande (RG), which supply water to two drinking water treatment plants (DWTPs) of Medellin, one of the most populated cities of Colombia. An analytical method based on solid-phase extraction (SPE) of the sample followed by measurement by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) was developed and validated for this purpose. Five monitoring campaigns were performed in each reservoir, collecting samples from 7 sites (LF) and 10 sites (RG) at 3 different depths of the water column...
January 20, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28105468/simulating-the-effect-of-spectroscopic-mri-as-a-metric-for-radiation-therapy-planning-in-patients-with-glioblastoma
#8
J Scott Cordova, Shravan Kandula, Saumya Gurbani, Jim Zhong, Mital Tejani, Oluwatosin Kayode, Kirtesh Patel, Roshan Prabhu, Eduard Schreibmann, Ian Crocker, Chad A Holder, Hyunsuk Shim, Hui-Kuo Shu
Due to glioblastoma's infiltrative nature, an optimal radiation therapy (RT) plan requires targeting infiltration not identified by anatomical magnetic resonance imaging (MRI). Here, high-resolution, whole-brain spectroscopic MRI (sMRI) is used to describe tumor infiltration alongside anatomical MRI and simulate the degree to which it modifies RT target planning. In 11 patients with glioblastoma, data from preRT sMRI scans were processed to give high-resolution, whole-brain metabolite maps normalized by contralateral white matter...
December 2016: Tomography: a Journal for Imaging Research
https://www.readbyqxmd.com/read/28104041/what-is-the-role-of-health-systems-in-responding-to-domestic-violence-an-evidence-review
#9
Jo Spangaro
Objective The aim of the present study was to review and analyse academic literature and program evaluations to identify promising evidence for health system responses to domestic violence in Australia and internationally.Methods English-language literature published between January 2005 and March 2016 was retrieved from search results using the terms 'domestic violence' or 'intimate partner violence' in different combinations with other relevant terms, resulting in 1671 documents, of which 59 were systematic reviews...
January 20, 2017: Australian Health Review: a Publication of the Australian Hospital Association
https://www.readbyqxmd.com/read/28103862/involving-members-of-vulnerable-populations-in-the-development-of-patient-decision-aids-a-mixed-methods-sequential-explanatory-study
#10
Michèle Dugas, Marie-Ève Trottier, Selma Chipenda Dansokho, Gratianne Vaisson, Thierry Provencher, Heather Colquhoun, Maman Joyce Dogba, Sophie Dupéré, Angela Fagerlin, Anik M C Giguere, Lynne Haslett, Aubri S Hoffman, Noah M Ivers, France Légaré, Jean Légaré, Carrie A Levin, Matthew Menear, Jean-Sébastien Renaud, Dawn Stacey, Robert J Volk, Holly O Witteman
BACKGROUND: Patient decision aids aim to present evidence relevant to a health decision in understandable ways to support patients through the process of making evidence-informed, values-congruent health decisions. It is recommended that, when developing these tools, teams involve people who may ultimately use them. However, there is little empirical evidence about how best to undertake this involvement, particularly for specific populations of users such as vulnerable populations. METHODS: To describe and compare the development practices of research teams that did and did not specifically involve members of vulnerable populations in the development of patient decision aids, we conducted a secondary analysis of data from a systematic review about the development processes of patient decision aids...
January 19, 2017: BMC Medical Informatics and Decision Making
https://www.readbyqxmd.com/read/28103841/a-two-site-two-arm-34-week-double-blind-parallel-group-randomized-controlled-trial-of-reduced-nicotine-cigarettes-in-smokers-with-mood-and-or-anxiety-disorders-trial-design-and-protocol
#11
Sophia I Allen, Jonathan Foulds, Gladys N Pachas, Susan Veldheer, Corinne Cather, Nour Azzouz, Shari Hrabovsky, Ahmad Hameed, Jessica Yingst, Erin Hammett, Jennifer Modesto, Nicolle M Krebs, Junjia Zhu, Jason Liao, Joshua E Muscat, John Richie, A Eden Evins
BACKGROUND: The U.S. Food and Drug Administration can set standards for cigarettes that could include reducing their nicotine content. Such a standard should improve public health without causing unintended serious consequences for sub-populations. This study evaluates the effect of progressive nicotine reduction in cigarettes on smoking behavior, toxicant exposure, and psychiatric symptoms in smokers with comorbid mood and/or anxiety disorders using a two-site, two-arm, double-blind, parallel group, randomized controlled trial (RCT) in four phases over 34 weeks...
January 19, 2017: BMC Public Health
https://www.readbyqxmd.com/read/28103281/selection-of-native-tree-species-for-subtropical-forest-restoration-in-southwest-china
#12
Yang Lu, Sailesh Ranjitkar, Rhett D Harrison, Jianchu Xu, Xiaokun Ou, Xuelan Ma, Jun He
The use of native species in forest restoration has been increasingly recognized as an effective means of restoring ecosystem functions and biodiversity to degraded areas across the world. However, successful selection of species adapted to local conditions requires specific knowledge which is often lacking, especially in developing countries. In order to scale up forest restoration, experimental data on the responses of native species to propagation and restoration treatments across a range of local conditions are required...
2017: PloS One
https://www.readbyqxmd.com/read/28102993/status-report-the-public-health-and-planning-101-project-strengthening-collaborations-between-the-public-health-and-planning-professions
#13
A Mahendra, T Vo, C Einstoss, J Weppler, P Gillen, L Ryan, K Haley
INTRODUCTION: Land use planning is a complex field comprised of legislation, policies, processes and tools. A growing body of evidence supports the relationship between land use planning decisions, community design and health. The built environment has been shown to be associated with physical inactivity, obesity, cardiovascular disease, respiratory disease and mental illness. Consequently, there is a growing interest within public health to work with planners on land use planning initiatives such as official plans and transportation master plans...
January 2017: Health Promotion and Chronic Disease Prevention in Canada
https://www.readbyqxmd.com/read/28102943/comparison-of-five-cluster-validity-indices-performance-in-brain-18-f-fet-pet-image-segmentation-using-k-means
#14
Bedor Abualhaj, Guoyang Weng, Melissa Ong, Ali Asgar Attarwala, Flavia Molina, Karen Büsing, Gerhard Glatting
PURPOSE: Dynamic [(18) F]fluoro-ethyl-L-tyrosine positron emission tomography ([(18) F]FET-PET) is used to identify tumor lesions for radiotherapy treatment planning, to differentiate glioma recurrence from radiation necrosis and to classify gliomas grading. To segment different regions in the brain k-means cluster analysis can be used. The main disadvantage of k-means is that the number of clusters must be pre-defined. In this study, we therefore compared different cluster validity indices for automated and reproducible determination of the optimal number of clusters based on the dynamic PET data...
January 2017: Medical Physics
https://www.readbyqxmd.com/read/28102928/reduction-in-colposcopy-workload-and-associated-clinical-activity-following-hpv-catch-up-vaccination-programme-in-scotland-an-ecological-study
#15
M E Cruickshank, J Pan, S C Cotton, K Kavanagh, C Robertson, K Cuschieri, H Cubie, T Palmer, K G Pollock
OBJECTIVE: To measure patterns of clinical activity at colposcopy before and after vaccinated women entered the Scottish Cervical Screening Programme (SCSP). DESIGN: Population-based observational study using nationally collected data. SETTING: Scottish colposcopy clinics. SAMPLE: All women with a date of birth on or after 1 January 1985 who attended colposcopy in Scotland between 2008-2014. METHODS: Routinely collected data from the Scottish National Colposcopy Clinical Information Audit System (NCCIAS) was extracted, including: referral criteria, referral cervical cytology, colposcopic findings, clinical procedures and histology results...
January 19, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28102580/the-sliding-context-of-health-the-challenges-faced-by-patients-with-heart-failure-from-the-perspective-of-patients-health-care-providers-and-family-members
#16
Parvin Mangolian Shahrbabaki, Esmat Nouhi, Majid Kazemi, Fazlollah Ahmadi
AIMS AND OBJECTIVES: The aim of this study was to understand the challenges faced by patients with heart failure. BACKGROUND: Heart failure is a clinical syndrome that is increasing across the globe. People affected with it, encounter various problems that reduce their quality of life and well-being. Therefore, identifying the challenges faced by patients with heart failure is necessary for health care and treatment plans. DESIGN: This study was performed using the qualitative research approach and content analysis method...
January 19, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/28101829/autism-spectrum-disorders%C3%A2-diagnosis-and-management
#17
REVIEW
Sharmila Banerjee Mukherjee
Autism Spectrum Disorder (ASD) is a neuro-developmental disorder commonly seen in children. It is characterized by age inappropriate, impaired social communication and the presence of stereotypic behavior. This disorder is hypothesized to result from cerebral dysfunction arising from a complex interaction between genetic, epigenetic and environmental factors. ASD should be suspected in children failing ASD specific screening tests, in the presence of red flags in social, language and/or play domains, in children with developmental or language delay, abnormal behavior, poor school performance or in those who are at high risk...
January 19, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/28100406/modeling-of-path-planning-and-needle-steering-with-path-tracking-in-anatomical-soft-tissues-for-minimally-invasive-surgery
#18
Pan Li, Shan Jiang, Dong Liang, Zhiyong Yang, Yan Yu, Wei Wang
Steerable needles can potentially improve the effectiveness of diagnostic and therapeutic procedures, such as biopsy and cancer treatment, by increasing the targeting accuracy and reaching previously inaccessible targets. A discrete potential field algorithm based on three dimensional (3D) anatomical structures is proposed in this paper to plan the needle path in minimally invasive surgery. A 3D kinematic model of needle steering is formulated using Lie group theory. Model parameters are fitted using experimental data acquired via a 2-degree of freedom robotic device and an ultrasound imaging device...
January 16, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28100266/arranging-blood-for-elective-thyroid-surgeries-dilemma-continues-in-the-developing-world
#19
Salman Faridi, Aman Ahmad, Mirza Arshad Beg, Faisal Siddiqui, Muhammad Muzzammil Edhi, Mehmood Khan
BACKGROUND: Cross matched blood is frequently ordered based on a subjective anticipation of blood loss for a procedure. Excessive blood arrangement and wastage overburdens the blood bank in terms of work load and storage of blood, increases cost of medical care and results in injudicious use of a limited resource. The aim of this short report is to assess the current practice for arranging cross matched blood in elective thyroid surgeries by comparing cross match to blood transfused ratio...
January 18, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28099993/conditional-estimation-in-two-stage-adaptive-designs
#20
Per Broberg, Frank Miller
We consider conditional estimation in two-stage sample size adjustable designs and the consequent bias. More specifically, we consider a design which permits raising the sample size when interim results look rather promising, and which retains the originally planned sample size when results look very promising. The estimation procedures reported comprise the unconditional maximum likelihood, the conditionally unbiased Rao-Blackwell estimator, the conditional median unbiased estimator, and the conditional maximum likelihood with and without bias correction...
January 18, 2017: Biometrics
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