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https://www.readbyqxmd.com/read/28547868/improving-three-dimensional-mechanical-imaging-of-breast-lesions-with-principal-component-analysis
#1
Mohit Tyagi, Yuqi Wang, Timothy Hall, Paul E Barbone, Assad A Oberai
PURPOSE: Elastography has emerged as a new tool for detecting and diagnosing many types of diseases including breast cancer. To date, most clinical applications of elastography have utilized two-dimensional strain images. The goal of this paper is to present a new quasi-static elastography technique that yields shear modulus images in three dimensions METHODS: An automated breast volume scanner was used to acquire ultrasound images of the breast as it was gently compressed. Cross-correlation between successive images was used to determine the displacement within the tissue...
May 26, 2017: Medical Physics
https://www.readbyqxmd.com/read/28543705/empirical-and-pragmatic-adequacy-of-grounded-theory-advancing-nurse-empowerment-theory-for-nurses-practice
#2
Sonia A Udod, Louise Racine
AIMS AND OBJECTIVE: Drawing on the findings of a grounded theory study aimed at exploring how power is exercised in nurse-manager relationships in the hospital setting, this paper examines the empirical and pragmatic adequacy of grounded theory as a methodology to advance the concept of empowerment in the area of nursing leadership and management. BACKGROUND: The evidence on staff nurse empowerment has highlighted the magnitude of individual and organizational outcomes, but has not fully explicated the micro-level processes underlying how power is exercised, shared or created within the nurse-manager relationship...
May 25, 2017: Journal of Clinical Nursing
https://www.readbyqxmd.com/read/28543430/planet-an-ellipse-fitting-approach-for-simultaneous-t1-and-t2-mapping-using-phase-cycled-balanced-steady-state-free-precession
#3
Yulia Shcherbakova, Cornelis A T van den Berg, Chrit T W Moonen, Lambertus W Bartels
PURPOSE: To demonstrate the feasibility of a novel, ellipse fitting approach, named PLANET, for simultaneous estimation of relaxation times T1 and T2 from a single 3D phase-cycled balanced steady-state free precession (bSSFP) sequence. METHODS: A method is presented in which the elliptical signal model is used to describe the phase-cycled bSSFP steady-state signal. The fitting of the model to the acquired data is reformulated into a linear convex problem, which is solved directly by a linear least squares method, specific to ellipses...
May 22, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28541896/solving-inaccuracies-in-anatomical-models-for-electrocardiographic-inverse-problem-resolution-by-maximizing-reconstruction-quality
#4
Miguel Rodrigo, Andreu Climent, Alejandro Liberos, Ismael Hernandez-Romero, Angel Arenal, Javier Bermejo, Francisco Fernandez-Aviles, Felipe Atienza, Maria Guillem
Electrocardiographic Imaging (ECGI) has become an increasingly used technique for non-invasive diagnosis of cardiac arrhythmias, although the need for medical imaging technology to determine the anatomy hinders its introduction in the clinical practice. This work explores the ability of a new metric based on the inverse reconstruction quality for the location and orientation of the atrial surface inside the torso. Body surface electrical signals from 31 realistic mathematical models and four AF patients were used to estimate the optimal position of the atria inside the torso...
May 23, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28539115/quad-phased-data-mining-modeling-for-dementia-diagnosis
#5
Sunjoo Bang, Sangjoon Son, Hyunwoong Roh, Jihye Lee, Sungyun Bae, Kyungwon Lee, Changhyung Hong, Hyunjung Shin
BACKGROUND: The number of people with dementia is increasing along with people's ageing trend worldwide. Therefore, there are various researches to improve a dementia diagnosis process in the field of computer-aided diagnosis (CAD) technology. The most significant issue is that the evaluation processes by physician which is based on medical information for patients and questionnaire from their guardians are time consuming, subjective and prone to error. This problem can be solved by an overall data mining modeling, which subsidizes an intuitive decision of clinicians...
May 18, 2017: BMC Medical Informatics and Decision Making
https://www.readbyqxmd.com/read/28536978/a-6-dof-parallel-bone-grinding-robot-for-cervical-disc-replacement-surgery
#6
Heqiang Tian, Chenchen Wang, Xiaoqing Dang, Lining Sun
Artificial cervical disc replacement surgery has become an effective and main treatment method for cervical disease, which has become a more common and serious problem for people with sedentary work. To improve cervical disc replacement surgery significantly, a 6-DOF parallel bone-grinding robot is developed for cervical bone-grinding by image navigation and surgical plan. The bone-grinding robot including mechanical design and low level control is designed. The bone-grinding robot navigation is realized by optical positioning with spatial registration coordinate system defined...
May 24, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28535716/extended-two-stage-adaptive-designs-with-three-target-responses-for-phase-ii-clinical-trials
#7
Seongho Kim, Weng Kee Wong
We develop a nature-inspired stochastic population-based algorithm and call it discrete particle swarm optimization to find extended two-stage adaptive optimal designs that allow three target response rates for the drug in a phase II trial. Our proposed designs include the celebrated Simon's two-stage design and its extension that allows two target response rates to be specified for the drug. We show that discrete particle swarm optimization not only frequently outperforms greedy algorithms, which are currently used to find such designs when there are only a few parameters; it is also capable of solving design problems posed here with more parameters that greedy algorithms cannot solve...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/28530533/respiratory-motion-management-in-pet-ct-applications-and-clinical-usefulness
#8
Luca Guerra, Elena De Ponti, Sabrina Morzenti, Chiara Spadavecchia, Cinzia Crivellaro
Although breathing movement can introduce heavy bias in both image quality and quantitation, currently there is lack of interest for the respiratory motion management in PET/CT imaging. The respiratory gating technology has shown significant benefits on image quality, reducing motion related artifacts and increasing quantification. Indeed, many papers have demonstrated that there is a consistent increase of the Standardized Uptake Value (SUV) in gated PET images when compared to ungated ones, particularly for the small lesions located both in liver and in lung...
May 19, 2017: Current Radiopharmaceuticals
https://www.readbyqxmd.com/read/28528621/using-lean-to-rapidly-and-sustainably-transform-a-behavioral-health-crisis-program-impact-on-throughput-and-safety
#9
Margaret E Balfour, Kathleen Tanner, Paul J Jurica, Dawn Llewellyn, Robert G Williamson, Chris A Carson
BACKGROUND: Lean has been increasingly applied in health care to reduce waste and improve quality, particularly in fast-paced and high-acuity clinical settings such as emergency departments. In addition, Lean's focus on engagement of frontline staff in problem solving can be a catalyst for organizational change. In this study, ConnectionsAZ demonstrates how they applied Lean principles to rapidly and sustainably transform clinical operations in a behavioral health crisis facility. METHODS: A multidisciplinary team of management and frontline staff defined values-based outcome measures, mapped the current and ideal processes, and developed new processes to achieve the ideal...
June 2017: Joint Commission Journal on Quality and Patient Safety
https://www.readbyqxmd.com/read/28528347/discriminative-accuracy-of-physician-and-nurse-predictions-for-survival-and-functional-outcomes-6-months-after-an-icu-admission
#10
Michael E Detsky, Michael O Harhay, Dominique F Bayard, Aaron M Delman, Anna E Buehler, Saida A Kent, Isabella V Ciuffetelli, Elizabeth Cooney, Nicole B Gabler, Sarah J Ratcliffe, Mark E Mikkelsen, Scott D Halpern
Importance: Predictions of long-term survival and functional outcomes influence decision making for critically ill patients, yet little is known regarding their accuracy. Objective: To determine the discriminative accuracy of intensive care unit (ICU) physicians and nurses in predicting 6-month patient mortality and morbidity, including ambulation, toileting, and cognition. Design, Setting, and Participants: Prospective cohort study conducted in 5 ICUs in 3 hospitals in Philadelphia, Pennsylvania, and enrolling patients who spent at least 3 days in the ICU from October 2013 until May 2014 and required mechanical ventilation, vasopressors, or both...
May 21, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28527497/informatics-and-technology-in-resident-education
#11
REVIEW
William Niehaus
Biomedical or clinical informatics is the transdisciplinary field that studies and develops effective uses of biomedical data, information technology innovations, and medical knowledge for scientific inquiry, problem solving, and decision making, with an emphasis on improving human health. Given the ongoing advances in information technology, the field of informatics is becoming important to clinical practice and to residency education. This article will discuss how informatics is specifically relevant to residency education and the different ways to incorporate informatics into residency education, and will highlight applications of current technology in the context of residency education...
May 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28523717/stress-and-coping-strategies-among-saudi-nursing-students-during-clinical-education
#12
Ekhlas Al-Gamal, Aisha Alhosain, Khulood Alsunaye
PURPOSE: The purpose of this study was to determine the stress level and coping strategies among undergraduate Saudi female nursing students during their clinical education. DESIGN AND METHODS: In this study, a descriptive correlational cross-sectional design was used. The Demographic Information Questionnaire, Perceived Stress Scale, and Coping Behavior Inventory were completed by 121 female Saudi undergraduate nursing students. FINDINGS: The findings showed that stress from taking care of the patient subscale (M = 12...
May 18, 2017: Perspectives in Psychiatric Care
https://www.readbyqxmd.com/read/28520669/investigating-the-connection-between-traumatic-brain-injury-and-posttraumatic-stress-symptoms-in-adolescents
#13
Tara Rhine, Amy Cassedy, Keith Owen Yeates, Hudson Gerry Taylor, Michael W Kirkwood, Shari L Wade
OBJECTIVE: To identify potentially modifiable individual and social-environmental correlates of posttraumatic stress symptoms (PTSS) among adolescents hospitalized for traumatic brain injury (TBI). SETTING: Four pediatric hospitals and 1 general hospital in the United States. PARTICIPANTS: Children ages 11 to 18 years, hospitalized for moderate-severe TBI within the past 18 months. DESIGN: Retrospective cross-sectional analysis...
May 17, 2017: Journal of Head Trauma Rehabilitation
https://www.readbyqxmd.com/read/28516959/adaptive-psychological-structure-in-childhood-hearing-impairment-audiological-correlations
#14
A Serra, G Spinato, S Cocuzza, L Licciardello, P Pavone, L Maiolino
The present research deals with the clinical and social problems present during linguistic and cognitive development of deaf children. Currently, the development of Theory of Mind represents an important research field in deafness studies. These international studies highlighted a significant alteration in the development of Theory of Mind in deaf children compared to normal hearing children, especially in cases of congenital or preverbal hearing loss. In particular, the research focuses on the skills of deaf children in recognising emotions and desires, through both perceptive and cognitive methods, by evaluation of psycho-cognitive skills of children with severe hearing loss using a set of questions to be administered to hearing loss patients...
June 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/28514473/effective-team-practices-interprofessional-contributions-to-communication-issues-with-a-parent-s-perspective
#15
Karena Cooper-Duffy, Kerri Eaker
Purpose: This clinical focus article contains a detailed description of how to build effective teams that use interprofessional collaborative practice (IPCP) with special-education professionals, speech-language pathologists, and families of children with severe disabilities. Method: This clinical focus article provides information on using the essential elements of team building and IPCP to provide quality care to families who have children with severe disabilities...
May 17, 2017: American Journal of Speech-language Pathology
https://www.readbyqxmd.com/read/28513769/the-situation-of-nursing-education-in-latin-america-and-the-caribbean-towards-universal-health
#16
Silvia Helena De Bortoli Cassiani, Lynda Law Wilson, Sabrina de Souza Elias Mikael, Laura Morán Peña, Rosa Amarilis Zarate Grajales, Linda L McCreary, Lisa Theus, Maria Del Carmen Gutierrez Agudelo, Adriana da Silva Felix, Jacqueline Molina de Uriza, Nathaly Rozo Gutierrez
Objective: to assess the situation of nursing education and to analyze the extent to which baccalaureate level nursing education programs in Latin America and the Caribbean are preparing graduates to contribute to the achievement of Universal Health. Method: quantitative, descriptive/exploratory, cross-sectional study carried out in 25 countries. Results: a total of 246 nursing schools participated in the study. Faculty with doctoral level degrees totaled 31...
May 11, 2017: Revista Latino-americana de Enfermagem
https://www.readbyqxmd.com/read/28513424/a-review-of-six-methods-for-monitoring-infliximab-concentrations-and-antibodies-to-infliximab%C3%A2
#17
Fang Cao, Hailong Cao, Xiaocang Cao
Anti-TNF-α therapy, such as infliximab (IFX), has profoundly changed treatment to induce and maintain remission for inflammatory bowel diseases patients who do not respond to conventional therapies. Unfortunately, IFX, as a chimeric protein, is potentially immunogenic, and antibodies to infliximab (ATI) may interfere with the pharmacodynamics and pharmacokinetics of the drug, thus resulting in a loss of response for a substantial proportion of patients. The clinical efficacy of IFX is correlated with the levels of IFX and ATI...
May 17, 2017: International Journal of Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28512434/evaluation-of-a-rapid-anisotropic-model-for-ecg-simulation
#18
Simone Pezzuto, Peter Kal'avský, Mark Potse, Frits W Prinzen, Angelo Auricchio, Rolf Krause
State-of-the-art cardiac electrophysiology models that are able to deliver physiologically motivated activation maps and electrocardiograms (ECGs) can only be solved on high-performance computing architectures. This makes it nearly impossible to adopt such models in clinical practice. ECG imaging tools typically rely on simplified models, but these neglect the anisotropic electric conductivity of the tissue in the forward problem. Moreover, their results are often confined to the heart-torso interface. We propose a forward model that fully accounts for the anisotropic tissue conductivity and produces the standard 12-lead ECG in a few seconds...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28511550/ct-features-in-surgically-proven-cases-of-ovarian-torsion-a-pictorial-review
#19
Sunita Dhanda, Swee Tian Quek, Ying Ting Mok, Clement Yong Hsiang Rong, Yuik Sing Eric Ting, Pooja Jagmohan, Bernard Wee
Ovarian torsion is a surgical emergency characterized by a partial or complete rotation of the ovarian vascular pedicle, causing obstruction to venous outflow followed by arterial inflow. Clinically, ovarian torsion frequently mimics other causes of acute pelvic pain such as appendicitis, diverticulitis, renal colic etc. Ultrasonography (US) is the first line imaging modality of choice for evaluation of ovarian torsion. MRI is useful as a problem solving tool in patients with equivocal or non diagnostic US studies...
May 16, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28509871/nutraceutical-value-of-citrus-flavanones-and-their-implications-in-cardiovascular-disease
#20
REVIEW
Lara Testai, Vincenzo Calderone
Background- Cardiovascular diseases, including myocardial infarction, dyslipidaemia and coronary artery pathology, are a major cause of illness and death in Western countries. Therefore, identifying effective therapeutic approaches and their cellular signalling pathways is a challenging goal for medicine. In this regard, several epidemiological studies demonstrate a relationship between the intake of flavonoid-rich foods and the reduction of cardiovascular risk factors and mortality. In particular, flavonoids present in citrus fruits, such as oranges, bergamots, lemons and grapefruit (95% from flavanones), are emerging for their considerable nutraceutical value...
May 16, 2017: Nutrients
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