Multislice Ct
Mostrando 1-12 de 24 artigos, teses e dissertações.
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1. A clinical trial on 3D CT scan and polysomnographyc changes after rapid maxillary expansion in children with snoring
Abstract Objective: The present prospective clinical study aimed to investigate the effects of rapid maxillary expansion on the airway, correlating airway volumes obtained on multi-slice computed tomography and polysomnography assessment of oxygen saturation and apnea/hypopnea index. Methods: Twenty-four patients (11 with obstructive sleep apnea and 13 wit
Brazilian Journal of Otorhinolaryngology. Publicado em: 2022
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2. Accuracy of linear measurements performed with two imaging software in cone-beam computed tomography scans of dry human mandibles
ABSTRACT The present study aimed to assess the accuracy of linear measurements performed with two software packages in multislice (MSCT) and cone beam (CBCT) computed tomography (CT) images. The sample consisted of 10 human mandibles marked standardly 8 times with metallic orthodontic wires. The mandibles underwent both MSCT and CBCT scanning and were measur
An. Acad. Bras. Ciênc.. Publicado em: 07/12/2017
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3. Quantificação das grandezas dosimétricas em exames de tomografia computadorizada pediátricos do abdome
Objetivo: Visando contribuir para o conhecimento das doses em tomografia computadorizada (TC), este trabalho teve o objetivo de quantificar grandezas dosimétricas associadas a exames do abdome em pacientes pediátricos, comparando-as com os níveis de referência em radiodiagnóstico (NRD). Materiais e métodos: O estudo foi realizado em dois hospitais, em
Radiol Bras. Publicado em: 2014-10
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4. Bone density: comparative evaluation of Hounsfield units in multislice and cone-beam computed tomography
The aim of this study was to evaluate the validity of the bone density value of potential implant sites in HU obtained by a specific cone-beam computed tomography (CBCT) device. In this study, the HU values obtained using a MSCT scanner were used as the gold standard. Twenty mandibles (40 potential implant sites) were scanned using an MSCT scanner (Somatom S
Braz. oral res.. Publicado em: 2012-12
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5. Estudo prospectivo e randomizado da revascularização do miocárdio minimamente invasiva com dissecção da artéria torácica interna esquerda por videotoracoscopia robótica / Robotic left internal mammary artery harvesting for single vessel minimally invasive coronary bypass: a randomized controlled trial
Objective: The aim of this study was to compare the patency of left internal mammary artery (LIMA) robotically harvested for left anterior descendent (LAD) artery minimally invasive bypass with conventional LIMA to LAD off-pump bypass. Method: From 2007 to 2010, 36 patients were randomized to either LIMA robotically harvested to LAD artery minimally invasive
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/10/2011
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6. Avaliação comparativa dos coeficientes de Hounsfield entre a tomografia computadorizada de feixe cônico e tomografia multislice / Comparative evaluation of the coefficients of Hounsfield between cone computed tomography and multislice CT
The aim of this study was to compare the attenuation coefficients (Hounsfield Unit) in both cone-beam computed tomography (CT) and multislice CT images. The 40-channel CT scanner (SOMATOM Sensation 40 - Siemens) was used to obtain images (n=20) of macerated mandibles considering the following protocol: axial slices of 0.7 mm in thickness and an interval of 0
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/02/2011
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7. Influence of dental metallic artifact from multislice CT in the assessment of simulated mandibular lesions
OBJECTIVE: This study evaluated the influence of metallic dental artifacts on the accuracy of simulated mandibular lesion detection by using multislice technology. MATERIAL AND METHODS: Fifteen macerated mandibles were used. Perforations were done simulating bone lesions and the mandibles were subjected to axial 16 rows multislice CT images using 0.5 mm of s
Journal of Applied Oral Science. Publicado em: 2010-04
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8. Avaliação volumétrica de defeitos ósseos em fissuras de rebordo alveolar e palato duro por meio da 3D-TC multislice e feixe cônico / Volumetric assessment of hard palate and alveolar cleft using multislice and cone beam 3DCT
As fissuras de rebordo alveolar e palato duro estão entre as malformações mais frequentes do corpo humano, podendo causar extensas deformidades ósseas faciais, com implicações biopsíquico-sociais marcantes. A avaliação da extensão desses defeitos ósseos, através de exames por imagem, tem sido feita com o objetivo de diagnosticar e planejar a tera
Publicado em: 2010
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9. Estudo Comparativo entre Ressonância Magnética Convencional, Artro-Ressonância Magnética e Artro-Tomografia Computadorizada Multidetectores do Ombro, em esportistas com hipótese diagnóstica de luxação/instabilidade glenoumeral e/ou lesão SLAP. / Comparative study between conventional MRI, MR arthrography and multi-slice CT arthrography of the shoulder, in sportsmen with diagnostic hypothesis of dislocation/glenohumeral instability and/or SLAP lesion.
Alguns radiologistas experientes consideram que, com o desenvolvimento dos aparelhos de RM e com a experiência adquirida, cada vez menos se precisa da introdução intra-articular de contraste no ombro, para a avaliação das estruturas internas, à semelhança do que ocorreu com o menisco e as demais estruturas internas do joelho. O autor desconhece a exis
Publicado em: 2010
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10. Evaluation of simulated bone lesion in the head of the mandible by using multislice computed tomography
Conventional radiography has shown limitation in acquiring image of the ATM region, thus, computed tomography (CT) scanning has been the best option to the present date for diagnosis, surgical planning and treatment of bone lesions, owing to its specific properties. OBJECTIVE: The aim of the study was to evaluate images of simulated bone lesions at the head
Journal of Applied Oral Science. Publicado em: 2009-10
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11. Low dose computed tomography for dental implants : dosimetry and image quality / Tomografia computadorizada de baixa dose para implantes : dosimetria e qualidade de imagem
Computed Tomography (CT) is frequently used for planning implants. But, it is a consensus that its use deals with a high amount of X radiation, what limits its reference to complex cases. With the advent of multislice CT (MSCT), it s possible to acquire exams in minimal time, with isometric voxel images that allow high quality multiplanar reconstructions. Ho
Publicado em: 2009
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12. Estudo de comportamento de fluxo através de modelo físico e computacional de aneurisma de aorta infra-renal obtido por tomografia. / Flow behavior study through physical and computacional model of infrarenal aortic aneurysm obtained by tomography.
Aneurisma de Aorta Abdominal (AAA) é definido como uma dilatação localizada e permanente da parede arterial, geralmente com ocorrência entre as artérias renais e as ilíacas, como conseqüência do enfraquecimento dessa parede ou devido a uma solicitação anormal sobre sua estrutura normal. Essa afecção acomete principalmente a população idosa acim
Publicado em: 2009