Value of Oblique Axial MPR Imaging of MSCT in Diagnosing the Fracture of Geniculate Fossa of Facial Nerve Canal and Its Nearby / 实用放射学杂志

ABSTRACT

Objective To evaluate the diagnostic value of oblique axial multiplanar reformation(MPR)imaging in detecting the fracture of geniculate fossa of facial nerve canal and its nearby.Methods 33 cases of facial nerve canal or nearby fracture confirmed by surgery were collected.CT findings(including conventional axial,coronal and oblique axial MPR images)were retrospectively analysed in comparison with that of operation.The diagnostic corresponding rate of two diagnostic modes(the combination of routine axial and coronal imagings,the combination of routine axial,coronal and oblique axial imagings)were compared.Results The fractures of geniculate fossa or the proximate of tympanic segment were seen in 22 cases on pre-operation CT images,including 8 cases on routine axial images,6 cases on routine coronal images and 20 cases on oblique axial MPR images.Local enlargement of geniculate fossa or the proximate of tympanic segment were seen in 26 cases on oblique axial MPR images.There were significant differences between these two diagnostic modes.Conclusion Oblique axial MPR images in combined with routine axial and coronal images can improve the diagnostic corresponding rate of the fracture of geniculate fossa and its nearby.