This study was analysed scannographic and magnetic resonance imaging features of cochlear implant candidates. 35 cases suffering from bilateral profound deafness, undergone screening for CI from Jan 2011 to April 2012. Temporal CT scanner, Brain and inner ear MR imaging were performed in the Bach Mai Hospital. The results showed that male/ female is 18/17, average age is 8 yaers. None has outer ear abnormality. Six cases (17.1 percent) have malformation of middle ear. Ten cases (28.6) suffer from acute otitis media. Two cases with inner malformation and three cases with labirynthitis. In general, CT scanner and MR imaging play an important role in preoperative bilan of CI.