MP2RAGE, a self bias-field corrected sequence for improved segmentation and T-1-mapping at high field

The large spatial inhomogeneity in transmit B, field (B-1(+)) observable in human MR images at hi h static magnetic fields (B-0) severely impairs image quality. To overcome this effect in brain T-1-weighted images the, MPRAGE sequence was modified to generate two different images at different inversion times MP2RAGE By combining the two images in a novel fashion, it was possible to create T-1-weigthed images where the result image was free of proton density contrast, T-2* contrast, reception bias field, and, to first order transmit field inhomogeneity. MP2RAGE sequence parameters were optimized using Bloch equations to maximize contrast-to-noise ratio per unit of time between brain tissues and minimize the effect of B-1(+) variations through space. Images of high anatomical quality and excellent brain tissue differentiation suitable for applications such as segmentation and voxel-based morphometry were obtained at 3 and 7 T. From such T-1-weighted images, acquired within 12 min, high-resolution 3D T-1 maps were routinely calculated at 7 T with sub-millimeter voxel resolution (0.65-0.85 mm isotropic). T-1 maps were validated in phantom experiments. In humans, the T, values obtained at 7 T were 1.15 +/- 0.06 s for white matter (WM) and 1.92 +/- 0.16 s for grey matter (GM), in good agreement with literature values obtained at lower spatial resolution. At 3 T, where whole-brain acquisitions with 1 mm isotropic voxels were acquired in 8 min the T-1 values obtained (0.81 +/- 0.03 S for WM and 1.35 +/- 0.05 for GM) were once again found to be in very good agreement with values in the literature. (C) 2009 Elsevier Inc. All rights reserved.

Chebyshev-type quadrature formulas for new weight classes

We give Chebyshev-type quadrature formulas for certain new weight classes. These formulas are of highest possible degree when the number of nodes is a power of 2. We also describe the nodes in a constructive way, which is important for applications. One of our motivations to consider these type of problems is the Faraday cage phenomenon for discrete charges as discussed by J. Korevaar and his colleagues.

North South Survey of Children's Height, Weight and Body Mass Index, 2002.

North South Survey of Children’s Height, Weight and Body Mass Index, 2002. As part of a North South Survey of Childrenâ?Ts Oral Health conducted in Ireland in 2001/â?T02 [1], the heights and weights of a representative sample of children and adolescents age 4-16 years was measured. Data were collected by 34 teams of trained and calibrated dentists and dental nurses for 17,518 children aged 4-16 in the Republic of Ireland (RoI) and 2,099 in Northern Ireland (NI). Click here to download PDF 379kb

Unmodified self antigen triggers human CD8 T cells with stronger tumor reactivity than altered antigen

Human cancer vaccines are often prepared with altered "analog" or "heteroclitic" antigens that have been optimized for HLA class I binding, resulting in enhanced immunogenicity. Here, we take advantage of CpG oligodeoxynucleotides as powerful vaccine adjuvants and demonstrate the induction of high T cell frequencies in melanoma patients, despite the use of natural (unmodified) tumor antigenic peptide. Compared with vaccination with analog peptide, natural peptide induced T cell frequencies that were approximately twofold lower. However, T cells showed superior tumor reactivity because of (i) increased functional avidity for natural antigen and (ii) enhancement of T cell activation and effector function. Thus, novel vaccine formulations comprising potent immune stimulators may allow to circumvent the need for modified antigens and can induce highly functional T cells with precise antigen specificity

Cre recombinase-mediated inactivation of H-2Dd transgene expression: evidence for partial missing self-recognition by Ly49A NK cells.

We have established H-2D(d)-transgenic (Tg) mice, in which H-2D(d) expression can be extinguished by Cre recombinase-mediated deletion of an essential portion of the transgene (Tg). NK cells adapted to the expression of the H-2D(d) Tg in H-2(b) mice and acquired reactivity to cells lacking H-2D(d), both in vivo and in vitro. H-2D(d)-Tg mice crossed to mice harboring an Mx-Cre Tg resulted in mosaic H-2D(d) expression. That abrogated NK cell reactivity to cells lacking D(d). In D(d) single Tg mice it is the Ly49A+ NK cell subset that reacts to cells lacking D(d), because the inhibitory Ly49A receptor is no longer engaged by its D(d) ligand. In contrast, Ly49A+ NK cells from D(d) x MxCre double Tg mice were unable to react to D(d)-negative cells. These Ly49A+ NK cells retained reactivity to target cells that were completely devoid of MHC class I molecules, suggesting that they were not anergic. Variegated D(d) expression thus impacts specifically missing D(d) but not globally missing class I reactivity by Ly49A+ NK cells. We propose that the absence of D(d) from some host cells results in the acquisition of only partial missing self-reactivity.

The Healthy Weight Challenge

To help encourage, facilitate and empower people to adopt healthy lifestyles and to raise awareness of obesity and its causes in order to reduce its prevalence within the target community. Outcome Through Health Classes, Leaflets and Posters, people have developed their knowledge and understanding of obesity. The relationship between members of the community and the pharmacist has also developed as as has the Pharmacists links with GPs, Dieticians, Leisure Centre Management etcï_… All participants thought the healthy weight challenge was a good idea, made them more aware of health and the pharmacy was able to offer advice, information, support and health checks. regular monitoring also helped have a positive impact on participants desire to lose weight and also had positive impact on their efforts to have healthier lifestyle.

North South Survey of Children's Height, Weight and Body Mass Index, 2002

As part of a North South Survey of Childrens Oral Health conducted in Ireland in 2001/’02 [1], the heights and weights of a representative sample of children and adolescents age 4-16 years was measured. Data were collected by 34 teams of trained and calibrated dentists and dental nurses for 17,518 children aged 4-16 in the Republic of Ireland (RoI) and 2,099 in Northern Ireland (NI). This report presents the results of the study which provide a baseline measurement of Childrens height and weight against which future change can be measured. By comparing these data with international norms we can estimate the current prevalence of overweight and obesity among children and adolescents in Ireland.

Trends in self-reported prevalence and management of hypertension, dyslipidaemia and diabetes in adults in Switzerland, 1992-2007

Purpose: to assess the trends of self-reported prevalence of cardiovascular risk factors (CV RFs: hypertension, dyslipidaemia, diabetes) and their management for period 1992 to 2007 in the Swiss population. Methods: four National health interview surveys conducted between 1992 and 2007 in representative samples of the Swiss population (63,782 subjects overall). Self-reported CV RFs prevalence, treatment and controllevels were computed after weighting. Weights were calculated by raking ratio such that the marginal distribution of the weighted totals conforms to the marginal distribution of the targeted population. Multivariate analysis adjusted on age, sex, education, nationality and SMI was conducted using logistic regression. Results: prevalence of ail CV RFs increased between 1992 and 2007, see table. Although the self-reported prevalence of treatment among subjects with CV RFs increased, and this was confirmed by multivariate analysis: OR for hypocholesterolaemic treatment relative to 1992: 0.64 [0.52-0.78]; 1.39 [1.18-1.65] and 2.00 [1.69-2.36] for 1997, 2002 and 2007, respectively. Still, in 2007, circa 40% of hypertensive, 60% of dyslipidaemic and 50% of diabetic subjects weren't treated. Conversely, an adequate control of CV RFs was reported by treated subjects, with an increase during the study period. This increase was confirmed by multivariate analysis (not shown). Conclusion: the self-reported prevalence of hypertension, dyslipidaemia and diabetes increased between 1992 and 2007 in the Swiss population. Despite a good control of treated subjects, still a significant percentage of subjects with CV RFs are not treated.

Media guidelines for reporting suicide and self-harm

These guidelines are for those in the media who have involvement with the reporting or portrayal of suicide and represent an important source of information to help ensure that the quality of reporting and portrayal on this important and sensitive topic is of a high standard.

Why weight?

This poster encourages people to become more physically active by promoting walking as a means of losing weight.

Dialogism and dialogicality in the study of the self

This article stems from the statement that dialogical approaches to a study of the self face a double challenge: that of developing a conception of the self that both avoids social reductionism and accounts for the stability of the self. In discussing this double challenge, we identify three much debated issues: (a) To what does the notion of "Alter" exactly refer? (b) How could we conceptualize the fact that Subject-Alter interactions are not only interpersonal but entail larger social entities, in particular institutions? (c)What importance should we attach to the materiality of objects? We discuss these three questions from two standpoints - that of linguistics and that of psychology - and illustrate our theoretical proposals with an analysis of an excerpt taken from a focus-group discussion. In conclusion, we argue that the dialogism of discourse provides us with some clues about the dialogicality of the mind, whereas the latter invites us to develop a theory showing the importance of interactions in the construction of the self, to pay more attention to the transpersonal dimension of the social, and to consider that the material world contributes to the construction of the self.

Obesity - an acknowledged public health challenge

As we face a difficult economic climate, in which inequalities may worsen, the PHA faces many challenges in its efforts to improve the health of the population. One such challenge is the issue of obesity. Recently, in the Draft Programme for Government and, again today, in anticipation of the publication of the Consultation on the Review of Health and Social Care Services in Northern Ireland, the specific issue of obesity has been highlighted in the media.The PHA is committed to playing a lead role in tackling this major health issue and has been systematically examining the evidence of best practice and effectiveness to ensure that investment and working in partnership will bring clear benefits. A welcome consequence of any success would be a reduction in the impact of the physical, and emotional costs of obesity related ill-health to individuals - and the financial costs to an overstretched healthcare system.A multi-facetted approach to tackling obesity is required for Northern Ireland. This will mean working across government departments, looking at relevant legislation, taxation, food standards and labelling, as well as supporting a raft of programmes within education, workplace, and at the local community level."The prevalence of overweight and obesity has risen dramatically in recent years in Northern Ireland and is now the norm to be overweight, rather than the exception. The Northern Ireland Health and Social Wellbeing Survey (2010-11) indicated that 36% of adults are overweight and a further 23% are obese; this means that approximately 3 in 5 adults in Northern Ireland carry excess weight. A similar proportion of males and females were obese (23%) however males were more likely to be overweight (44%) than females (30%).Data from the Northern Ireland Health and Wellbeing Survey (2010-11) reported that 27% of children aged 2-15 years are obese or overweight. The findings presented here are based on the guidelines put forward by the International Obesity Task Force. Using this approach, 8% of children were assessed as obese, with similar results for boys (8%) and girls (9%). Obesity has serious implications for health and wellbeing and is associated with an increased risk of heart disease and stroke, type 2 diabetes, some cancers, respiratory problems and joint pain.Evidence indicates that being obese can reduce life expectancy by up to 9 years; and it can impact on emotional and psychological well-being and self-esteem, especially among young people.Obesity also impacts on wider society through economic costs, loss of productivity and increased demands on our health and social care system. It is estimated that obesity in Northern Ireland is resulting in 260,000 working days lost each year with a cost to the local economy of £500 million.The good news is that the intentional loss of significant weight (approx 10kg) in overweight and obese adults has been shown to confer significant health benefits, decreased morbidity and may also reduce obesity-related mortality.Key programmes and interventions are undertaken by the PHA in order to prevent and reduce overweight and obesity. The programmes/interventions are supported by significant ongoing work at local level. Examples include:the promotion of breastfeeding; local programmes to increase awareness of good nutrition and develop cooking skills, for example 'Cook It!'; promotion of more active lifestyles, for example, Walking for Health' and 'Teenage Kicks'; development of community allotment schemes; programmes for primary school children, for example Skip2bfit and Eat, Taste and Grow; and sports and other recreation, for example 'Active Belfast'. The PHA's multi media campaign 'It all adds up!' to encourage children to become more active and understand the importance of keeping fit, in a fun and exciting way, ran until October 2011. It encouraged parents and carers to go to the website www.getalifegetactive.com and download the PHA logbook It all adds up! to plan activities as a family. The logbook helped children and parents plan and keep track of their participation in physical activity at school, home and in the community. PHA is currently developing a public information campaign and other supportive work to increase public awareness of obesity as well as to provide advice and support for those who want to make real changes. The campaign development is well underway and is anticipated for launch in late Spring 2012. Like many common health problems, people living in disadvantaged circumstances suffer most and the PHA is committed to tackling this aspect of health inequality. The good news is that even a modest weight loss, of 1-1 Â_ stones, can help to reduce the risk of many of the health problems resulting from being overweight or obese. Information on losing weight through healthier eating and being more active can be found on the PHA websites - www.enjoyhealthyeating.info and www.getalifegetactive.com . These websites provide help and advice for anyone who wants to improve their eating habits and fitness levels, by making small, sustainable, healthy changes to their lifestyle. The PHA leaflet, Small changes, big benefits is also available to download from the PHA website, 'Publications' section.