[Imaging techniques in the diagnosis and therapy of hip dysplasia and hip dislocation].

With the introduction of sonography and computed and magnetic resonance tomography into the diagnostic procedures of congenital dysplasia and congenital dislocation of the hip more detailed anatomic imaging has become available and has brought new insights and dynamics to the therapy of this frequent orthopedic problem. The techniques are discussed with representative illustrations and compared with each other as well as the 'classic' roentgenogram and arthrogram.