Navegando por Palavras-chave "x-ray computed"

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    Rotação axial do componente femoral da artroplastia total de joelho realizada pela técnica de balanceamento dos gaps: mensuração por tomografia computadorizada
    (Universidade Federal de São Paulo (UNIFESP), 2015-11-11) Aihara, Andre Yui [UNIFESP]; Fernandes, Artur da Rocha Correa Fernandes [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    Background: 1. Define femoral component rotation by computed tomography (CT) as follows: posterior condylar angle (PCA) and condylar twist angle (CTA). 2. Determine the reliability of these measurements by CT. 3. Evaluate the inter-relationship between PCA and CTA. 4. Evaluate the frequency and agreement for the identification of the medial epicondyle sulcus (MES). Methods: Fifty CT knee scans from patients with gap-technique total knee arthroplasty were retrospectively reviewed. The PCA and CTA were calculated by 2 radiologists. The intraclass correlation coefficient (ICC) and 95% confidence interval were used to assess inter/intraobserver reliability. The Bland-Altmann test was used to analyze the mean difference between PCA and CTA. The Kappa test was used to determine the agreement for the identification of the MES. Results: The mean femoral component rotation values, as evaluated by PCA and CTA, were ?2.26°/?2.56° and ?5.54°/?6.28°, respectively, for the first and second observers. The respective intra- and interobserver ICC values were 0.95 and 0.9 for PCA and 0.85 and 0.89 for CTA. The mean differences between these readings were 3.3° and 4.0°. The ICC was 0.954-0.949 for the PCA and 0.859-0.898 for the CTA. The PCA and CTA measurement differences were no greater than 2° at least 90% of the time. The MES was identified in 64?78% of patients, with a Kappa of 0.448-0.519. Conclusions: The mean femoral component rotation values, as evaluated by PCA and CTA, were ?2.26°/?2.56° and ?5.54°/?6.28°. PCA and CTA measurement by CT is reliable. The use of PCA is preferable because of the higher observer concordance. PCA can be inferred by subtracting 3-4° from the CTA. The MES was identified in 64?78% of patients, with only moderate interobserver agreement.
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    Tomografia computadorizada no diagnóstico da otosclerose fenestral
    (ABORL-CCF Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial, 2004-01-01) Vicente, Andy de Oliveira [UNIFESP]; Penido, Norma de Oliveira [UNIFESP]; Yamashita, Helio Kiitiro [UNIFESP]; Mangabeira-Albernaz, Pedro Luiz [UNIFESP]; Hospital Cema; Universidade Federal de São Paulo (UNIFESP)
    AIM: To identify the main tomographic findings of fenestral otosclerosis and to evaluate the utility of the high resolution computed tomography (HRCT) as a diagnostic method of this osteodystrophy. STUDY DESIGN: A prospective and multicentric study using computed tomography (CT) of the temporal bone. MATERIAL AND METHOD: 54 patients with a clinical and surgical diagnosis of otosclerosis. A tomographic analysis has been performed to evaluate the sensitivity of CT scans in diagnosing fenestral otosclerosis, verifying the sites of predilection for otosclerotic lesions, the bilateralism and symmetry of the disease. In this study, 22 patients undergone CT scans of temporal bones have been included in order to investigate other otologic diseases and have constituted the control group. RESULTS: The CT scan was positive in 87% of the patients (77% of the ears). The tomographic findings were mostly bilateral (78,7%) and the fenestral focus more prevalent was the anterior focus to the oval window. CONCLUSIONS: The CT scan has shown a high index of positivity and the anterior focus to the oval window has been the most prevalent in this population, and it could be considered the highly suggestive tomographic finding for otosclerosis.
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    Tomografia computadorizada no diagnóstico da otosclerose retrofenestral
    (ABORL-CCF Associação Brasileira de Otorrinolaringologia e Cirurgia Cérvico-Facial, 2004-01-01) Vicente, Andy de Oliveira [UNIFESP]; Penido, Norma de Oliveira [UNIFESP]; Yamashita, Helio Kiitiro [UNIFESP]; Mangabeira-Albernaz, Pedro Luiz [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Hospital Cema
    AIM: To identify the main tomographic findings of retrofenestral otosclerosis. METHODS: A prospective and multicentric study using computed tomography (CT) of the temporal bone in 54 patients with a clinical and surgical diagnosis of otosclerosis. A tomographic analysis has been performed to evaluate the utility of CT scans in diagnosing retrofenestral otosclerosis, verifying the sites of predilection for otosclerotic lesions. In this study, 22 patients undergone CT scans of temporal bones have been included in order to investigate other otologic diseases and have constituted the control group. RESULTS: The tomographic findings were mostly bilateral and the retrofenestral focus more prevalent was the pericochlear focus. CONCLUSIONS: The CT scan was useful in the identification of the retrofenestral focuses. The evidence of this focuses and the presence of the endosteal involvement of the cochlea can suggest a higher activity of the disease.