[CT of the talus: the importance of 2- and 3-dimensional reconstructions].
OBJECTIVE
To evaluate the clinical value of sagittal 2D- and 3D-reformations of the talus with and without electronic disarticulation compared to axial slices.


METHODS
23 patients with suspected traumatic lesions of the talus underwent 26 diagnostic CT examinations. Axial slices, sagittal reformations, and 3D-reformations without and with electronic disarticulation were performed. The sagittal 2D- and both types of 3D-reformations were compared to the axial slices with regard to their diagnostic information.


RESULTS
Axial slices showed involvement of articular facets in 25 cases. Sagittal and 3D-reformations after electronic disarticulation depicted 23 fractures (23/25), 3D-reformations without electronic disarticulation showed none (0/23). Subluxation of the talocalcaneal joint was only visualised on axial slices three times. One complete luxation of this joint was shown on axial slices, sagittal and 3D-reformations without disarticulation. It was not visualised on 3D-reformations after disarticulation.


CONCLUSIONS
The diagnosis must be made based on the axial slices, supported by sagittal reconstructions. 3D-reformations after electronic disarticulation provide a graphic, detailed and readily recognised image of the anatomy of transchondral fractures, and are very helpful in preoperative planning.
Freund
M
M
Klinik für Radiologische Diagnostik, Christian-Albrechts-Universität zu Kiel.
Harder
B
B
Palmié
S
S
Besch
L
L
Hutzelmann
A
A
Heller
M
M
D000293:Adolescent; D000328:Adult; D000368:Aged; D000843:Ankle Joint / Q000000981:diagnostic imaging; D002648:Child; D005260:Female; D050723:Fractures, Bone / Q000000981:diagnostic imaging; D006801:Humans; D004204:Joint Dislocations / Q000000981:diagnostic imaging; D008297:Male; D008875:Middle Aged; D013628:Talus / Q000000981:diagnostic imaging* / Q000293:injuries; D014057:Tomography, X-Ray Computed / Q000379:methods*
CT des Talus: Bedeutung zwei- und dreidimensionaler Rekonstruktionen.