نتایج جستجو برای: ssde
تعداد نتایج: 56 فیلتر نتایج به سال:
In this paper, we propose a self-constructing neural fuzzy network with dynamicform symbiotic evolution (SCNFN-DSE) for solving various problems. A novel hybrid learning approach, which consists of the self-clustering algorithm (SCA) and the dynamic-form symbiotic evolution (DSE), is proposed for adjusting the parameters of neural fuzzy networks. First, the proposed SCA is used to identify a pa...
The American College of Radiology opened the computed tomography (CT) dose index registry (DIR) for general participation by all facilities in 2011. For each CT examination, data on volume CT dose index (CTDIvol), dose-length product (DLP), and, for body examinations, size-specific dose estimate (SSDE) were collected. However, effective dose is not estimated in DIR. The primary objective of thi...
Introduction: This study aimed to establish the conversion factors to normalize the output dose of volumetric computed tomography dose index (CTDIvol) to the patient dose (i.e. size-specific dose estimate (SSDE)) for various phantom diameters and tube voltages. Material and Methods: In-house cylindrical acrylic phantoms with physical diameter...
Children are at greater risk of radiation exposure than adults because the rapidly dividing cells of children tend to be more radiosensitive and they have a longer expected life time in which to develop potential radiation injury. Some studies have surveyed computed tomography (CT) radiation doses and several studies have established diagnostic reference levels according to patient age or body ...
Radiological protection in paediatric population from medical imaging is a subject promoted by various international associations and it is becoming a main field of interest. Paediatric patients have a significant risk from ionizing radiation (IR) following X-ray examination (chest, abdomen and skeletal segments), multidetector CT (MDCT) and PET imaging [1]. Their greater damage’s risk is due t...
Para reducir la dosis de radiación en población pediátrica entre 0 y 10 años, a que se le realizan tomografías cráneo simple el Hospital Universitario Clínica San Rafael, redujo kV con adquieren las computarizadas (TC) 120 80 kV. Retrospectivamente, compara calidad imagen TC 33 pacientes tomados Se realiza un análisis cuantitativo uso relación contraste ruido materia gris blanca, índice artefac...
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