1,721,045 research outputs found
Preliminary validation of a new questionnaire to assess user satisfaction with orthotic devices
No full textRaspberry pi 3 multispectral low-cost sensor for uav based remote sensing. case study in south-west Niger
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A simulation tool to support teaching and learning the operation of x-ray imaging systems
No full textWe present a software tool for the simulation of an X-ray imaging systems. It consists of three virtual objects: the X-ray source, the human body and the detector. The X-ray source is modeled as a radiological tube for which the user can modify the tube potential, the anode material, the tube load, the filtration and some geometric parameters, such as source-skin distance, orientation and field size. The virtual body consists of a 3D voxel matrix in which CT numbers for each point of the body are stored, obtained from tomographic slices. The interactions of X-rays passing through the body are evaluated using pencil beam technique. The image is obtained computing the dose absorbed by the detector and converting it into optical density by the use of a proper response function. The dose absorbed in each point of the body is also computed and can be visualized both in 2D and 3D representations. The influence of each parameter on the beam spectrum, on the image quality and on the dose to the patient can be observed interactively. (c) 2005 IPEM. Published by Elsevier Ltd. All rights reserved
Analisi del cammino e dell'allineamento posturale in pazienti con megaprotesi per tumori del femore distale
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Gait analysis pre/post tap-test to prognosticate shunt responsiveness in normal pressure hydrocephalus
No full textINTRODUCTION and AIM Gait disturbance is a very common and disabling symptom of idiopathic normal pressure hydrocephalus (iNPH), and it is often the first sign to appear. The other classical symptoms are urinary incontinence and cognitive dysfunction. Shunt surgery aimed at removing the excess of cerebrospinal fluid (CSF) may improve the iNPH patient condition, and it is routinely applied to selected patients after a careful clinical assessment of the potential risks and benefits following the surgery. To improve the patient selection for shunting, clinicians may perform a taptest (TT), i.e., they remove 30-50 ml of CSF by lumbar puncture to obtain a temporary drainage. Improvements in gait after TT is often used to prognosticate shunt responsiveness. Patients are classified as tap-test responders or non-responders, depending on presence or absence of transient gait improvements after CSF removal. Gait improvements are usually evaluated by clinicians in a subjective way or performing the 10-m test. Instrumented gait analysis may be an important tool to assess gait changes after TT, thus helping the clinician in a better selection of the candidates for shunt surgery.The aim of this study is to propose an objective method, based on gait data, to classify TTresponders and non-responder
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