title: [Value of multi-slice spiral CT in the diagnosis of closed thyroid cartilage injury].
abstract: OBJECTIVE
  To explore the clinical application and to evaluate the value of multi-slice spiral computed tomography (MSCT) in closed thyroid cartilage injury.
  
  
  METHODS
  MSCT scan was performed in 5 patients with closed thyroid cartilage injury, and 2D and 3D images reconstructions were achieved after volume data was transferred to workstation.
  
  
  RESULTS
  In 5 cases, the thyroid cartilage fracture was found in left board in 4 patients, in right board in 1 patient. In addition, one patient had concurrent cricoid cartilage fracture and another patient had laryngotracheal stenosis. These fractures and changes were all visualized by 2D and 3D images. Lower window level and window width were helpful to reveal the structures of thyroid cartilage. Multi-planar reconstruction (MPR) was superior in displaying alignment and displacement of fracture in 4 cases. 3D-volume reconstruction (3D-VR) was accurate in displaying space change of cartilage structures. In 3 cases, the evaluation of 3D-VR was accurate in assessing the length, width and shape of fracture, providing helpful data for the clinician to adopt the optimal management Computed tomography virtual laryngoscope (CTVL) helped to offer the criterions to the diagnosis of upper airway stricture and the location of laryngotracheal stenosis in one case.
  
  
  CONCLUSIONS
  MSCT was useful in the diagnosis and management of closed thyroid cartilage injury and the laryngotracheal stenosis. It was believed that the reasonable use of the reprocessing technique plays an important role in the diagnosis, treatment and evaluation of the effect of closed thyroid cartilage injury.
authors.affiliation: Department of Radiology, Xiamen Traditional Chinese Medicine Hospital, Xiamen 361009, China. bluefishfx@yahoo.com.cn
authors.forename: Xiao-Yi
authors.initials: XY
authors.lastname: Fang
authors.forename: Zhen-Long
authors.initials: ZL
authors.lastname: Li
authors.forename: Su-Miao
authors.initials: SM
authors.lastname: Chen
authors.forename: Ying-Jie
authors.initials: YJ
authors.lastname: Zhao
mesh_terms: D000328:Adult; D006801:Humans; D021621:Imaging, Three-Dimensional; D008297:Male; D013957:Thyroid Cartilage / Q000293:injuries*; D036542:Tomography, Spiral Computed / Q000379:methods*; D014135:Tracheal Stenosis / Q000000981:diagnostic imaging*; D014947:Wounds and Injuries / Q000000981:diagnostic imaging*