Search results for "Radio"
showing 10 items of 8895 documents
Chronic Mesenteric Ischemia: Critical review and guidelines for management
2011
Background CMI is caused by chronic occlusive disease of mesenteric arteries. In such an uncommon disease, clear recommendations are strongly needed. Unfortunately, treatment options for symptomatic CMI are still controversial and no guidelines exist. Methods A systematic literature review of the last 25-years was conducted through MEDLINE, Embase, and Cochrane Review/Trials register to identify studies reporting on CMI treatment with more than 10 patients. Primary outcomes were perioperative mortality and morbidity rates. Secondary outcomes were survival rates, primary and secondary patency rates, vessels treated, CMI recurrence, follow-up (FU), technical success (TS), and in-hospital leng…
Analytical model for the long- distance tracer-transport in plants
2011
International audience; Recent investigations of long-distance transport in plants using non-invasive tracer techniques such as C radiolabeling monitored by positron emission tomography (PET) combined with magnetic resonance imaging (MRI) revealed the need of dedicated methods to allow a quantitative data analysis and comparison of such experiments. A mechanistic compartmental tracer transport model is presented, defined by a linear system of partial differential equations (PDEs). This model simplifies the complexity of axial transport and lateral exchanges in the transport pathways of plants (e.g. the phloem) by simulating transport and reversible exchange within three compartments using j…
Monikielisyydestä vähemmistökieliviestin SR Sisuradion nuoriso-ohjelmissa
2008
El uso de microesferas de vidrio marcadas con Itrio-90 en el tratamiento del hepatocarcinoma
2021
OBJETIVO: Establecer el valor pronóstico de las variables incluidas en el estudio (clínicas, dosimétricas, analíticas y demográficas) en la progresión de enfermedad y la supervivencia global de aquellos pacientes afectos de hepatocarcinoma en estadio intermedio y avanzado del BCLC y tratados con radioembolización con microesferas cargadas con Y90, así como los efectos secundarios derivados del tratamiento. MATERIAL Y MÉTODO: Estudio retrospectivo, analítico y observacional realizado en el Hospital Universitario y Politécnico la Fe (Valencia) que incluye a 53 pacientes tratados con radioembolización desde marzo de 2009 hasta diciembre de 2016. Todos ellos fueron clasificados según el algorit…
“Magnifying glass” for difficult radiocephalic arteriovenous fistulas
2012
Background: Some uremic patients suffering from diabetes, atherosclerosis or simple by absent or exhausted peripheral vascular bed require bigger effort in creating arteriovenous fistula. Although it is possible to use prosthetic graft for difficult cases, the use of native vessels falls always in the respect of patient’s quality of life. A help for these cases comes from the use of a microsurgical technique for creating vascular access. Patient and Methods: For this study we evaluated the 72 patients underwent microsurgical radiocephalic fistula comparing them to a homogeneous group of 72 patients underwent traditional surgery. The patients were followed up at 1, 2 months and 1 year. Resul…
Uusien 5G-teknologioiden energiatehokkuus
2016
Mobiiliverkkojen datamäärän kasvaessa räjähdysmäisesti tarvitaan uutta 5G-teknologiaa lisäämään langattomien verkkojen kapasiteettia. 5G-verkkoja kehitettäessä yksi tärkeä tutkimuskysymys on, kuinka saada niistä energiatehokkaita. Tässä tutkielmassa käydään läpi tieteellistä keskustelua aiheesta. Tieteellisestä keskustelusta keskeisimmiksi teknologioiksi 5G-verkkoihin nousevat muun muassa laitteistotekniikan kehittyminen, millimetriaallot, kognitiivinen radioverkko, massiivinen MIMO ja heterogeeninen verkko. Tarvitaan kuitenkin lisää tutkimusta ja kehitystyötä, jotta uusista 5G-verkoista saadaan riittävän energiatehokkaita. The amount of mobile data will grow radically and that's why we nee…
RADIOPROTECTION IN 2018: AN UPDATE
2018
Fluoroscopically-guided interventional procedures are performed in large numbers in Europe and in the United States. Radiation doses received by interventional radiologists can vary for the same type of procedure and for similar patient doses. Occupational radiation protection is a necessity whenever radiation is used in the practice of medicine. The International Commission on Radiological Protection is engaging against occupational radiation damages, publishing regular recommendations on dose limits. These limits are expressed as effective doses for the whole body and also as equivalent doses for particular regions or tissues of practitioners’ bodies. Shielding and personal protective clo…
An Exact Solution for the Level-Crossing Rate and the Average Duration of Fades of the Envelope of Sum-of-Cisoids Processes
2012
Authors version of an article published in the journal: Procedia Technology. Also available from the publisher at: http://dx.doi.org/10.1016/j.protcy.2012.03.004 Sum-of-cisoids (SOC) processes provide a physically and numerically appealing framework for the modelling and simulation of a wide class of mobile radio channels. This paper is concerned with the problem of finding a general solution for the level-crossing rate (LCR) and the average duration of fades (ADF) of the envelope of SOC processes. Exact expressions are derived for the LCR and the ADF by taking into account that the inphase component, the quadrature component, and the time derivatives of the inphase and quadrature component…
Monimediadeski toimintaympäristönä : Yleisradion Oulu Radion ja Pohjois-Suomen tv-uutisten työntekijöiden näkemykset monimediadeskistä ja sen aiheutt…
2002
Jonizējoša starojuma monitoringa principi kodolmedicīnā strādājošiem, veicot skeleta scintigrāfiju
2019
Bakalaura darba tēma ir “ Jonizējoša starojuma monitoringa principi kodolmedicīnā strādājošiem, veicot skeleta scintigrāfiju”. Bakalaura darbs sastāv no ievada, piecām daļām, secinājumiem un pielikumiem. Tēmas aktualitāti nosaka strauji pieaugošs onkoloģisko saslimšanu skaits, kā arī arvien vairāk slimniekiem tiek ordinēta skeleta scintigrāfija. Turklāt, ne mazāk svarīgs ir regulārs jonizējošā starojuma monitorings, lai personālam samazinātos iespējamība saņemt palielinātu starojuma dozu. Bakalura darba pētījumam tika izvirzīts sekojošs mērķis: noskaidrot jonizējoša starojuma mnonitoringa principus kodlmedicīnā strādājošiem, veicot skeleta scintigrāfiju. Uzstādītais pētījuma jautājums: piea…