Search results for "test"

A multiparametric magnetic resonance imaging-based virtual reality surgical navigation tool for robotic-assisted radical prostatectomy

2019

Objective Increased computational power and improved visualization hardware have generated more opportunities for virtual reality (VR) applications in healthcare. In this study, we test the feasibility of a VR-assisted surgical navigation system for robotic-assisted radical prostatectomy. Material and methods The prostate, all magnetic resonance imaging (MRI) visible tumors, and important anatomic structures like the neurovascular bundles, seminal vesicles, bladder, and rectum were contoured on a multiparametric MRI using an in-house segmentation software. Three-dimensional (3-D) VR models were rendered and evaluated in a side room of the operating room. While interacting with the VR platfo…

Conventional Radiology in the Evaluation of the Small Bowel

2015

For many years, the small bowel has been considered as the “black box” of the gastrointestinal system because it could not be evaluated through endoscopy. For this reason, the conventional radiological methods, such as small bowel enteroclysis and small bowel follow-through, have been considered the standard approach for the evaluation of the small bowel in the diagnosis and management of Crohn’s disease for years. However, due to technological limits, the study of small bowel through conventional radiology has been focused mainly on its function than on its anatomy. To date, the conventional examination with the study of intestinal transit is now rarely used, if not obsolete, but it has st…

The impact of modern jazz dance on the electrical brain activity

2018

AbstractDance as one of the earliest cultural assets of mankind is practised in different cultures, mostly for wellbeing or for treating psycho-physiological disorders like Parkinson, depression, autism. However, the underlying neurophysiological mechanisms are still unclear and only few studies address the effects of particular dance styles. For a first impression, we were interested in the effects of modern jazz dance (MJD) on the brain activation that would contribute to the understanding of these mechanisms. 11 female subjects rehearsed a MJD choreography for three weeks (1h per week) and passed electroencephalographic (EEG) measurements in a crossover-design thereafter. The objectives …

MRI in the Diagnosis of Right Ventricular Dysplasia

2006

ARVD is part of the group of cardiomyopathies characterised pathologically by fibrofatty replacement of the right ventricular myocardium and clinically by right ventricular arrhythmias of the LBBB pattern. Pathogenesis, prevalence, and aetiology are yet not fully known. The diagnosis of ARVD is based on the presence of structural, histological, electrocardiographic, and genetic factors. Therapeutic options include antiarrhythmic medication, catheter ablation, implantable cardioverter defibrillation, and surgery. Angiography and echocardiography lack sensitivity and specificity in the diagnosis of ARVD. MR imaging allows a three-dimensional evaluation of especially the right ventricle, and p…

EMG activities and plantar pressures during ski jumping take-off on three different sized hills

2001

Different profiles of ski jumping hills have been assumed to make the initiation of take-off difficult especially when moving from one hill to another. Neuromuscular adaptation of ski jumpers to the different jumping hills was examined by measuring muscle activation and plantar pressure of the primary take-off muscles on three different sized hills. Two young ski jumpers volunteered as subjects and they performed several trials from each hill (K-35 m, K-65 m and K-90 m) with the same electromyographic (EMG) electrode and insole pressure transducer set-up. The results showed that the differences in plantar pressure and EMGs between the jumping hills were smaller than expected for both jumper…

Augmenting–reducing paradox lost? A test of Davis et al.'s (1983) hypothesis

2002

Abstract The aim of the experiment was to test Davis et al.'s [Davis, C., Cowles, M., & Kohn, P. (1983). Strength of the nervous system and augmenting–reducing: paradox lost. Personality and Individual Differences, 4, 491–498.] hypothesis, that Petrie-style reducers become evoked potential (EP) augmenters at high intensities. Central, autonomic, and subjective responses to auditory stimuli of five intensities from 65 to 105 dB(A) were recorded in subjects classified as augmenters/reducers according to the Vando reducer–augmenter scale (RAS). Forty-five white noise stimuli of each intensity were presented. EEG, ECG, EDA, subjective and behavioral data were recorded. It was hypothezised that …

Magnification in apical surgerymusing the endoscope: a review

2011

Objective: A review is made to determine whether the use of the endoscope in endodontic surgery offers advantages in clinical practice, and whether it improves the clinical and radiographic outcomes of the procedure. Material and methods: The main search terms used were: endodontic surgery, apicoectomy, apical surgery, endoscope, and magnification devices . The authors searched the Medline database for articles published up to 1 September 2010. The review included experimental studies comparing endoscopic microstructural findings with the findings of the naked eye or other magnification devices, as well as prospective clinical trials comparing endodontic surgery with or without the use of a…

Bone Marrow Biopsy Revision According to WHO Criteria in 272 Patients of the Registro Italiano Trombocitemia (RIT): Preliminary Report On Clinical an…

2009

Abstract Abstract 4974 Background The bone marrow trephine biopsy (BMB) has a crucial role for the diagnosis of essential thrombocythemia (ET), both according to the PVSG and the WHO criteria. The WHO 2001 criteria enhanced the role of BMB also by distinguishing the true-ET (ET) from the prefibrotic and the early fibrotic chronic idiopathic myelofibrosis. The WHO 2008 criteria, in the JAK2 era, confirmed the diagnostic and prognostic relevance of the histopathological features in ET as well as in the other Ph-neg myeloproliferative neoplasms (MPN). Otherwise, only few validated data are presently available, and the reproducibility in the evaluation of some morphological details is still con…

Subclinical hypothyroidism and erectile dysfunction: The potential nexus

2020

Purpose: The aim of the study was to evaluate the link between subclinical hypothyroidism (SCH) and erectile dysfunction (ED). Materials and Methods: Seventy-two male patients aged 23–41 years with SCH compared with 25 healthy matched subjects were recruited, and they were divided into Group A: healthy controls (n = 25), Group B: patients with SCH with ED (n = 43), and Group C: patients with SCH without ED (n = 29). Thyroid function test and hormonal assay included total testosterone (TT), sex hormone-binding globulin, free androgen index, and prolactin (PRL) were measured; erectile function was assessed by the 5-item version of the International Index of Erectile Function (IIEF-5) question…

2020

Introduction Adolescents have experienced decreased aerobic fitness levels and insufficient physical activity levels over the past decades. While both physical activity and aerobic fitness are related to physical and mental health, little is known concerning how they manifest in the brain during this stage of development, characterized by significant physical and psychosocial changes. The aim of the study is to examine the associations between both physical activity and aerobic fitness with brains' functional connectivity. Methods Here, we examined how physical activity and aerobic fitness are associated with local and interhemispheric functional connectivity of the adolescent brain (n = 59…