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https://www.readbyqxmd.com/read/29345604/a-new-approach-of-three-dimensional-guidance-in-paediatric-cath-lab-segmented-and-tessellated-heart-models-for-cardiovascular-interventions-in-chd
#1
Nicole Ehret, Muhannad Alkassar, Sven Dittrich, Robert Cesnjevar, André Rüffer, Michael Uder, Oliver Rompel, Matthias Hammon, Martin Glöckler
BACKGROUND: Optimal imaging is essential for catheter-based interventions in CHD. The three-dimensional models in volume-rendering technique currently in use are not standardised. This paper investigates the feasibility and impact of novel three-dimensional guidance with segmented and tessellated three-dimensional heart models in catheterisation of CHD. In addition, a nearly radiation-free two- to three-dimensional registration and a biplane overlay were used. Methods and results We analysed 60 consecutive cases in which segmented tessellated three-dimensional heart models were merged with live fluoroscopy images and aligned using the tracheal bifurcation as a fiducial mark...
January 18, 2018: Cardiology in the Young
https://www.readbyqxmd.com/read/29344699/feasibility-study-of-mr-guided-transgluteal-targeted-in-bore-biopsy-for-suspicious-lesions-of-the-prostate-at-3-tesla-using-a-freehand-approach
#2
Frank Fischbach, Lukas Wien, Sascha Krueger, Bernhard Schnackenburg, Daniel Baumunk, Björn Friebe, Martin Schostak, Jens Ricke, Katharina Fischbach
OBJECTIVE: The aim of our study was (1) to establish an in-bore targeted biopsy of suspicious prostate lesions, avoiding bowel penetration using a transgluteal approach and (2) to assess operator setup, patient comfort and safety aspects in the clinical setting for freehand real-time MR-guidance established for percutaneous procedures in an open MR-scanner. MATERIAL AND METHODS: 30 patients with suspect prostate lesions were biopsied in a cylindrical 3T-MRI system using a transgluteal approach in freehand technique...
January 17, 2018: European Radiology
https://www.readbyqxmd.com/read/29343706/caloric-restriction-lowers-endocannabinoid-tonus-and-improves-cardiac-function-in-type-2-diabetes
#3
Huub J van Eyk, Linda D van Schinkel, Vasudev Kantae, Charlotte E A Dronkers, Jos J M Westenberg, Albert de Roos, Hildo J Lamb, J Wouter Jukema, Amy C Harms, Thomas Hankemeier, Mario van der Stelt, Ingrid M Jazet, Patrick C N Rensen, Johannes W A Smit
BACKGROUND/OBJECTIVES: Endocannabinoids (ECs) are associated with obesity and ectopic fat accumulation, both of which play a role in the development of cardiovascular disease (CVD) in type 2 diabetes (T2D). The effect of prolonged caloric restriction on ECs in relation to fat distribution and cardiac function is still unknown. Therefore, our aim was to investigate this relationship in obese T2D patients with coronary artery disease (CAD). SUBJECTS/METHODS: In a prospective intervention study, obese T2D patients with CAD (n = 27) followed a 16 week very low calorie diet (VLCD; 450-1000 kcal/day)...
January 17, 2018: Nutrition & Diabetes
https://www.readbyqxmd.com/read/29342058/mri-evaluation-of-repaired-versus-unrepaired-interportal-capsulotomy-in-simultaneous-bilateral-hip-arthroscopy-a-double-blind-randomized-controlled-trial
#4
Colin D Strickland, Matthew J Kraeutler, Matthew J Brick, Tigran Garabekyan, Jason T K Woon, Vivek Chadayammuri, Omer Mei-Dan
BACKGROUND: Techniques used in hip arthroscopy continue to evolve, and controversy surrounds the need for capsular repair following this surgical intervention. The purpose of this study was to evaluate the magnetic resonance imaging (MRI) appearance of the hip capsule in patients with femoroacetabular impingement (FAI) who underwent simultaneous bilateral hip arthroscopy through an interportal capsulotomy with each hip randomized to undergo capsular repair or not undergo such a repair...
January 17, 2018: Journal of Bone and Joint Surgery. American Volume
https://www.readbyqxmd.com/read/29342057/audiologic-natural-history-of-small-volume-cochleovestibular-schwannomas-in-neurofibromatosis-type-2
#5
Alvin T deTorres, Carmen C Brewer, Chris K Zalewski, Kelly A King, Robert Walker, Gretchen C Scott, Ashok R Asthagiri, Prashant Chittiboina, Hung Jeffrey Kim
OBJECTIVE: To characterize the audiometric natural progression in patient-ears with small volume (<1,000 mm), treatment-naïve cochleovestibular schwannomas (CVSs) in Neurofibromatosis Type 2 (NF2). STUDY DESIGN: Prospective, longitudinal cohort study. SETTING: Quaternary medical research institute. PATIENTS: One hundred eleven ears in 71 NF2 patients with small, treatment-naïve CVSs observed from July 2006 to July 2016...
January 16, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29341323/test-retest-reliability-and-longitudinal-analysis-of-automated-hippocampal-subregion-volumes-in-healthy-ageing-and-alzheimer-s-disease-populations
#6
Amanda Worker, Danai Dima, Anna Combes, William R Crum, Johannes Streffer, Steven Einstein, Mitul A Mehta, Gareth J Barker, Steve C R Williams, Owen O'daly
The hippocampal formation is a complex brain structure that is important in cognitive processes such as memory, mood, reward processing and other executive functions. Histological and neuroimaging studies have implicated the hippocampal region in neuropsychiatric disorders as well as in neurodegenerative diseases. This highly plastic limbic region is made up of several subregions that are believed to have different functional roles. Therefore, there is a growing interest in imaging the subregions of the hippocampal formation rather than modelling the hippocampus as a homogenous structure, driving the development of new automated analysis tools...
January 16, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29341016/oxygenation-imaging-by-nuclear-magnetic-resonance-methods
#7
Heling Zhou, Nuria Arias-Ramos, Pilar López-Larrubia, Ralph P Mason, Sebastián Cerdán, Jesús Pacheco-Torres
Oxygen monitoring is a topic of exhaustive research due to its central role in many biological processes, from energy metabolism to gene regulation. The ability to monitor in vivo the physiological distribution and the dynamics of oxygen from subcellular to macroscopic levels is a prerequisite to better understand the mechanisms associated with both normal and disease states (cancer, neurodegeneration, stroke, etc.). This chapter focuses on magnetic resonance imaging (MRI) based techniques to assess oxygenation in vivo...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29337280/behavioral-interventions-for-reducing-head-motion-during-mri-scans-in-children
#8
Deanna J Greene, Jonathan M Koller, Jacqueline M Hampton, Victoria Wesevich, Andrew N Van, Annie L Nguyen, Catherine R Hoyt, Lindsey McIntyre, Eric A Earl, Rachel L Klein, Joshua S Shimony, Steven E Petersen, Bradley L Schlaggar, Damien A Fair, Nico U F Dosenbach
A major limitation to structural and functional MRI (fMRI) scans is their susceptibility to head motion artifacts. Even submillimeter movements can systematically distort functional connectivity, morphometric, and diffusion imaging results. In patient care, sedation is often used to minimize head motion, but it incurs increased costs and risks. In research settings, sedation is typically not an ethical option. Therefore, safe methods that reduce head motion are critical for improving MRI quality, especially in high movement individuals such as children and neuropsychiatric patients...
January 11, 2018: NeuroImage
https://www.readbyqxmd.com/read/29336774/altered-cortical-thickness-and-attentional-deficits-in-adolescent-girls-and-women-with-bulimia-nervosa
#9
Laura A Berner, Mihaela Stefan, Seonjoo Lee, Zhishun Wang, Kate Terranova, Evelyn Attia, Rachel Marsh
BACKGROUND: Frontostriatal and frontoparietal abnormalities likely contribute to deficits in control and attentional processes in individuals with bulimia nervosa and to the persistence of dysregulated eating across development. This study assessed these processes and cortical thickness in a large sample of adolescent girls and women with bulimia nervosa compared with healthy controls. METHODS: We collected anatomical MRI data from adolescent girls and women (ages 12-38 yr) with full or subthreshold bulimia nervosa and age-matched healthy controls who also completed the Conners Continuous Performance Test-II (CPT-II)...
January 12, 2018: Journal of Psychiatry & Neuroscience: JPN
https://www.readbyqxmd.com/read/29335009/isolated-follicle-stimulated-hormone-deficiency-in-male-case-report
#10
Gowri M Ratnayake, P N Weerathunga, L P Ruwanpura, Amila Wickramasinghe, Prasad Katulanda
BACKGROUND: Recent rapid advances in assisted reproductive health technologies enables couples with subfertility to conceive through various intervention. Majority of treatment modalities target the female partner. However it is important to identify and treat male factor subfertility right at the outset. We report a case of isolated follicle stimulating hormone deficiency resulting in azoospermia and primary subfertility. CASE PRESENTATION: A 28 year otherwise healthy male presented with primary subfertility with a healthy female counterpart...
January 15, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29333116/is-there-a-role-for-contrast-enhanced-ultrasound-in-the-detection-and-biopsy-of-mri-only-visible-breast-lesions
#11
Aki Nykänen, Otso Arponen, Anna Sutela, Ritva Vanninen, Mazen Sudah
Background: This study aimed to evaluate the feasibility of contrast-enhanced ultrasound (CEUS) and CEUS-guided interventions in the diagnostics of MRI visible targeted US occult breast lesions. Patients and methods: This retrospective study examined 10 females with 10 occult, MRI only detected breast lesions between July 2014 and April 2017. Targeted second look US followed by CEUS with 2.4 ml of SonoVue® were performed for all of the lesions. After positive CEUS localization the same dose was repeated for confirmation and CEUS-guided interventions were performed...
December 2017: Radiology and Oncology
https://www.readbyqxmd.com/read/29332089/gene-therapy-for-parkinson-s-disease
#12
Vivek Sudhakar, R Mark Richardson
Gene therapy is a clinical tool that may eventually provide therapeutic benefit to patients suffering from movement disorders through a few potential mechanisms: direct correction of the pathogenic mechanism, neuroprotection, neurorestoration or symptom control. The therapeutic mechanism is therefore dependent on knowledge of disease pathogenesis and the required temporal and spatial specificities of gene expression. An additional critical challenge is achieving the most complete transduction of the target structure while avoiding leakage into neighboring regions or perivascular spaces...
2018: Progress in Neurological Surgery
https://www.readbyqxmd.com/read/29332083/deep-brain-stimulation-interventional-and-intraoperative-mri-approaches
#13
Paul S Larson, Philip A Starr, Alastair J Martin
Interventional and intraoperative MRI approaches to deep brain stimulator implantation are relatively new, and in their purest form represent a distinct departure from traditional stereotactic techniques. They employ a novel means of stereotaxis based on regions of interest in the MR space and simple geometric principles, which eliminate the need for a stereotactic frame. This approach is appropriate for targets that are MR visible, and for whom the local anatomy and function are well characterized. It may also be appropriate for targets that do not have a well-described physiologic signature and for which clinical response to macrostimulation does not play a critical role...
2018: Progress in Neurological Surgery
https://www.readbyqxmd.com/read/29331092/deep-grey-matter-volume-loss-drives-disability-worsening-in-multiple-sclerosis
#14
Arman Eshaghi, Ferran Prados, Wallace Brownlee, Daniel R Altmann, Carmen Tur, M Jorge Cardoso, Floriana De Angelis, Steven H van de Pavert, Niamh Cawley, Nicola De Stefano, M Laura Stromillo, Marco Battaglini, Serena Ruggieri, Claudio Gasperini, Massimo Filippi, Maria A Rocca, Alex Rovira, Jaume Sastre-Garriga, Hugo Vrenken, Cyra E Leurs, Joep Killestein, Lukas Pirpamer, Christian Enzinger, Sebastien Ourselin, Claudia A M Gandini Wheeler-Kingshott, Declan Chard, Alan J Thompson, Daniel C Alexander, Frederik Barkhof, Olga Ciccarelli
OBJECTIVE: Grey matter (GM) atrophy occurs in all multiple sclerosis (MS) phenotypes. We investigated whether there is a spatiotemporal pattern of GM atrophy that is associated with faster disability accumulation in MS. METHODS: We analysed 3,604 brain high-resolution T1-weighted MRI scans from 1,417 participants: 1,214 MS patients (253 clinically-isolated syndrome[CIS], 708 relapsing-remitting[RRMS], 128 secondary-progressive[SPMS], 125 primary-progressive[PPMS]), over an average follow-up of 2...
January 13, 2018: Annals of Neurology
https://www.readbyqxmd.com/read/29330835/international-guidelines-for-groin-hernia-management
#15
(no author information available yet)
INTRODUCTION: Worldwide, more than 20 million patients undergo groin hernia repair annually. The many different approaches, treatment indications and a significant array of techniques for groin hernia repair warrant guidelines to standardize care, minimize complications, and improve results. The main goal of these guidelines is to improve patient outcomes, specifically to decrease recurrence rates and reduce chronic pain, the most frequent problems following groin hernia repair. They have been endorsed by all five continental hernia societies, the International Endo Hernia Society and the European Association for Endoscopic Surgery...
January 12, 2018: Hernia: the Journal of Hernias and Abdominal Wall Surgery
https://www.readbyqxmd.com/read/29327096/-focused-ultrasound-ablation-as-tremor-treatment
#16
REVIEW
Sebastian R Schreglmann, Stefan Hägele-Link, Beat Werner, Ernst Martin, Georg Kägi
BACKGROUND: The development of high-intensity magnetic resonance imaging (MRI)-guided focused ultrasound (MRIgFUS) ablation has widened the spectrum of interventional techniques for stereotactic functional neurosurgery of lesions. This has resulted in novel incisionless intervention approaches for the therapy of tremor disorders. The safety and efficacy is documented by recent study data. OBJECTIVES: This article encompasses a description of the technological basis and typical course of MRIgFUS interventions, a comparison to alternative open or incisionless surgical techniques as well as a review of the current evidence base for MRIgFUS ablation in the context of lesional interventions to treat tremor...
January 11, 2018: Der Nervenarzt
https://www.readbyqxmd.com/read/29326290/functional-lesional-neurosurgery-for-tremor-a-systematic-review-and-meta-analysis
#17
REVIEW
Sebastian R Schreglmann, Joachim K Krauss, Jin Woo Chang, Kailash P Bhatia, Georg Kägi
BACKGROUND: This work evaluates the consistency, effect size and incidence of persistent side effects of lesional neurosurgical interventions in the treatment of tremor due to Parkinson's disease (PD), essential tremor (ET), multiple sclerosis (MS) and midbrain lesions. METHODS: Systematic review and meta-analysis according to PRISMA-P guidelines. Random effects meta-analysis of standardised mean difference based on a peer-reviewed protocol (PROSPERO no. CRD42016048049)...
January 11, 2018: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/29325596/late-normal-tissue-response-in-the-rat-spinal-cord-after-carbon-ion-irradiation
#18
Maria Saager, Peter Peschke, Thomas Welzel, Lifi Huang, Stephan Brons, Rebecca Grün, Michael Scholz, Jürgen Debus, Christian P Karger
BACKGROUND: The present work summarizes the research activities on radiation-induced late effects in the rat spinal cord carried out within the "clinical research group ion beam therapy" funded by the German Research Foundation (DFG, KFO 214). METHODS AND MATERIALS: Dose-response curves for the endpoint radiation-induced myelopathy were determined at 6 different positions (LET 16-99 keV/μm) within a 6 cm spread-out Bragg peak using either 1, 2 or 6 fractions of carbon ions...
January 11, 2018: Radiation Oncology
https://www.readbyqxmd.com/read/29323669/cost-effectiveness-and-comparative-effectiveness-of-cancer-risk-management-strategies-in-brca1-2-mutation-carriers-a-systematic-review
#19
Lara Petelin, Alison H Trainer, Gillian Mitchell, Danny Liew, Paul A James
PurposeTo review the evidence for the effectiveness and cost-effectiveness of cancer risk management interventions for BRCA carriers.MethodsComparative effectiveness and cost-effectiveness analyses were identified by searching scientific and health economic databases. Eligible studies modeled the impact of a cancer risk management intervention in BRCA carriers on life expectancy (LE), cancer incidence, or quality-adjusted life years (QALYs), with or without costs.ResultsTwenty-six economic evaluations and eight comparative effectiveness analyses were included...
January 11, 2018: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/29322877/topographical-variation-of-human-femoral-articular-cartilage-thickness-t1rho-and-t2-relaxation-times-is-related-to-local-loading-during-walking
#20
Sam Van Rossom, Mariska Wesseling, Dieter Van Assche, Ilse Jonkers
Objective Early detection of degenerative changes in the cartilage matrix composition is essential for evaluating early interventions that slow down osteoarthritis (OA) initiation. T1rho and T2 relaxation times were found to be effective for detecting early changes in proteoglycan and collagen content. To use these magnetic resonance imaging (MRI) methods, it is important to document the topographical variation in cartilage thickness, T1rho and T2 relaxation times in a healthy population. As OA is partially mechanically driven, the relation between these MRI-based parameters and localized mechanical loading during walking was investigated...
January 1, 2018: Cartilage
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