[The CT of calcaneal fractures: 3-D reconstructions with electronic disarticulation].
OBJECTIVE
To evaluate the clinical value of 3-D-reformations with and without electronic disarticulation of calcaneal fractures compared to axial CT and sagittal reformations.


METHODS
25 patients with intra-articular calcaneal fractures underwent diagnostic CT-examinations. Axial slices, sagittal and 3-D-reformations with and without electronic disarticulation were performed. The sagittal and both types of 3-D-reformations were compared to the axial slices with regard to the diagnostic criteria: involvement of articular facets, number of fragments, and traumatic changes of the hindfoot.


RESULTS
The best proof of involvement of articular facets is found in axial slices and 3-D-reconstructions after disarticulation followed by sagittal reconstructions. Usually on 3-D-reconstructions without disarticulation articular facets cannot be identified because of overlapping bones. The number of fragments is clearly demonstrated by axial slices and sagittal reconstructions followed by 3-D-reconstructions after disarticulation. Traumatic changes of the hindfoot can be diagnosed in all four forms of visualisation.


CONCLUSIONS
The decisive diagnosis for treatment planning is made based on the axial slices supported by sagittal reformations. In unclarified cases 3-D-reformations after electronic disarticulation may provide further information. 3-D-reformations without disarticulation are useless.
Freund
M
M
Klinik für Radiologische Diagnostik, Christian-Albrechts-Universität zu Kiel.
Hohendorff
B
B
Zenker
W
W
Hutzelmann
A
A
Heller
M
M
D000328:Adult; D000368:Aged; D001175:Arthrography; D002111:Calcaneus / Q000000981:diagnostic imaging* / Q000293:injuries*; D005069:Evaluation Studies as Topic; D005260:Female; D050723:Fractures, Bone / Q000000981:diagnostic imaging*; D006801:Humans; D004204:Joint Dislocations / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D012984:Software; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000379:methods*
CT von Kalkaneusfrakturen: 3-D-Rekonstruktionen mit elektronischer Desartikulation.