Keywords:
Trauma, Diagnostic procedure, MR, CT, Musculoskeletal bone
Authors:
X. LI; Lanzhou/CN
DOI:
10.1594/ecr2013/C-2619
Methods and Materials
Patients
28 patients with Os trigonum syndrome were confirmed by MRI from 107 patients with trauma of ankle.
28 patients with trauma of Os trigonum syndrome of the ankle enrolmented into the study of follow-up between 09/2005 and 01/2012 (mean age 38years; range 17–63 years ,17 males and 11 female).
all patients were examined immediately by MRI after trauma,
all 28 patients were examined of follow-up by CT afterone year.
All of the images underwent sign analysis by two experienced radiologist.The study was performed in accordance with the regulations of the local institutional review board and ethics committee.
Written,
informed consent was obtained from all patients before the examination.
Imaging techniques
CT studies
Used the Philips MX800 dual-slice Spiral CT ,told the patients supine position,
120 kV,
250 mA,
scan slice thickness 5 mm and scan slice spacing 5 mm,
the scanning area ranged from the 50mm above of the ankle to the articular surface of the metatarsal bone .
MRI studies
Used MRI 1.5T,Scanning Cross-section:parallel to the talus top,from the joint of the lower tibia and fibula to calcaneus Calcaneus lower edge,used FSE(TR/TE=3200ms/20ms,85ms),T 2 W I、PDWI,
used fat suppression .Coronal scan: The basilar line was cross-section,scaned from parallel to the connections of the medial and lateral malleolus,
used SE ,T1WI(TR/TE=500ms/14ms,double FSE(TR/TE=3200ms/20ms,85ms).Sagittal scan: The basilar line was cross-section,vertical the in the inner malleolus connection scan ,used double FSE of the fat suppression .FOV:160mm,Layer thick :3-4mm,matrix:256 x 240.