RESUMEN
PURPOSE: We aimed to determine any differences, if present, between the cross-sectional area of the cochlear nerve (CN) of elderly patients with sensorineural hearing loss (SNHL) and of young patients with normal hearing. MATERIALS AND METHODS: The study group included ten patients with age-related SNHL. Fourteen volunteer individuals with normal hearing were recruited as the control group. T1-weighted, T2-weighted and parasagittal three-dimensional Fourier transformation constructive interference in steady state (3DFT-CISS) reconstruction images of all cases were evaluated. Images were examined for any abnormality of CN. The data obtained for each ear with clinical, radiological and audiometric examinations were evaluated. RESULTS: The mean CN cross-sectional area was measured as 0.0252 cm(2) in the control group, whereas that in the SNHL group was 0.0232 cm(2). Although speech discrimination scores showed significant differences, no statistically significant difference was observed for the CN cross-sectional area (p=0.0616). Likewise, there was no difference in CN calibre between male and female patients. CONCLUSIONS: The 3DFT-CISS sequence yields superior results in CN imaging. Acquired SNHL may not present with significant changes in CN size on magnetic resonance imaging (MRI).
Asunto(s)
Nervio Coclear/patología , Pérdida Auditiva Sensorineural/patología , Imagen por Resonancia Magnética/métodos , Adulto , Factores de Edad , Anciano , Estudios de Casos y Controles , Femenino , Humanos , Interpretación de Imagen Asistida por Computador , Masculino , Persona de Mediana Edad , Percepción del HablaRESUMEN
INTRODUCTION: Our purpose was to determine whether diffusion-weighted MR imaging (DWI) could be used in differentiation of benign and malign breast lesions. MATERIALS AND METHODS: 41 women patients were included in the study. 45 lesions were diagnosed by biopsy; 25 (55.5%) of these lesions were malignant and 20 (44.5%) were benign. The apparent diffusion coefficient (ADC) values of these lesions were prospectively compared with their histopathological results. RESULTS: Differentiation of the malignant and benign masses revealed that the threshold value of the ADC was 1.0 x 10(-3) mm(2)/s, its sensitivity was demonstrated as 95%, specificity as 100%, positive predictive as 100%, negative predictive as 94% and accuracy rate as 97%. CONCLUSIONS: DWI improves diagnostic accuracy of the conventional breast MRI. ADC measurements may be useful for differentiation of the malign and benign masses.