Navegando por Palavras-chave "Temporal bone"

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    Criação de modelo virtual individualizado do osso temporal humano para impressão tridimensional
    (Universidade Federal de São Paulo (UNIFESP), 2016-10-18) Pontes, Antonio Augusto de Lima [UNIFESP]; Penido, Norma de Oliveira Penido [UNIFESP]; http://lattes.cnpq.br/7060786297081212; http://lattes.cnpq.br/1913770349209021; Universidade Federal de São Paulo (UNIFESP)
    Dissection of the temporal bone is a fundamental part in otological training. Traditionally this training is done with temporal bones from cadavers, but currently the legal acquisition of these bones is quite complex and troublesome. At the same time, the otologic surgeon does not have a reliable way to simulate in advance the surgical procedure, since even owning an anatomical part, the difference in anatomy between individuals, creates a unique need every patient. Objective: Get custom virtual models of bones time that could be used for rapid prototyping printers to create physical models using digital tools available to any public, following defined steps. Method: We use 10 CT scans of the temporal bones of patients without ear disease, in DICOM format, with number of slices ranging from 186 to 320. In them we evaluated the presence of pre-defined anatomical structures. We employed the programs InVesalius to create the virtual model of the temporal bones, Blender to remove artifacts and Private NetFabb for optimizing models for 3D printing. Results: Of the anatomical structures sought in 10 CT scans, the stapes bone and the facial nerve canal were not always present on the images of the exams. In InVesalius program were made the reconstruction of all bone structures present in 10 CT scans; gray scale was used, which average values for the 10 reconstructions were -466 for the dark tones and 2700 for light. In the 3 CT scans that had 186 cuts, the reconstructions were not satisfactory. Still in this program was made the delimitation of the temporal bones. All reconstructions showed structural artifacts and errors. In the program Blender 3D was possible to remove all artifacts from the 7 satisfactory reconstructions. The NetFabb Private program, after analysing the models, identified and corrected structural errors in the 7 reconstructions, optimizing them for three-dimensional printing. Conclusion: It is possible to get custom virtual models of human temporal bone for actual three-dimensional printing using digital tools, following defined steps.
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    Osteodistrofias raras do osso temporal
    (ABORL-CCF Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial, 2005-04-01) Antunes, Marcos Luiz [UNIFESP]; Testa, Jose Ricardo Gurgel [UNIFESP]; Frazatto, Ricardo [UNIFESP]; Barberi, Jose Antonio Ferreira [UNIFESP]; Silva, Rogério Fernandes Nunes da [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Temporal bone osteodysplasia can produce many different symptoms, such as involvement restricted to the temporal bone or impairment of other bones. We consider, in this study two entities that are rare osteodysplasia cases, which are osteopetrosis and Camurati-Engelmann disease, the latter being extremely rare. We present two cases of benign form of osteopetrosis (Albers-Schulenburg's disease), a patient of 11 years old and another one of 48 years old, both male, and a patient of 28 years old, female, with Camurati-Engelmann's disease. The facial palsy was a manifestation in two of the patients. We discuss some aspects about the clinical manifestations, radiological findings, as well as differential diagnostic and therapy in view of the complications of the diseases.
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    Sistematização do estudo anatômico do aqueduto vestibular por tomografia computadorizada de alta resolução em pacientes com doenças de Ménière unilateral
    (Colégio Brasileiro de Radiologia e Diagnóstico por Imagem, 2006-10-01) Alvarenga, Eliézia Helena de Lima [UNIFESP]; Cruz, Oswaldo Laércio Mendonça [UNIFESP]; Yamashita, Helio Kiitiro [UNIFESP]; Lima, Eliece José de; Alvarenga, Adalberto Martins; Bisinoto, Sirlei Maria Barra; Universidade Federal de São Paulo (UNIFESP); Hospital Samaritano de São Paulo; Universidade de São Paulo (USP)
    OBJECTIVE: To systematize the assessment of vestibular aqueduct by high-resolution computed tomography (HRCT) in patients with unilateral Ménière's disease as compared with a control group. MATERIALS AND METHODS: We have selected 20 patients with unilateral Ménière's disease, according to the guidelines proposed by the American Academy of Otolaryngology - Head and Neck Surgery. The control group consisted of ten individuals with normal audiometric tests. Overall, we have studied 60 ears, equally divided into three groups: group I - Ménière's disease, affected ear; group II - Ménière's disease, non-affected ear; group III - control. All the individuals have undergone temporal bones HRCT. Images were blindly reviewed, trying to evaluate the visibility of the descendent portion of the ventricular aqueduct. Afterwards data were correlated with their respective groups. RESULTS: We have identified the vestibular aqueduct in 95% of ears in group I, 90% in group II, and 100% in group III. CONCLUSION: It is possible to perform a systematic evaluation of the vestibular aqueduct by axial HRCT, using the same radiological technique, anatomical knowledge and sequential images of inner ear structures. With this systematic approach we have obtained a high rate of vestibular aqueduct visualization, with no statistically significant difference between the groups.