Articulated Model Registration of MRI/X-Ray Spine Data
This paper presents a method based on articulated models for the registration of spine data extracted from multimodal medical images of patients with scoliosis. With the ultimate aim being the development of a complete geometrical model of the torso of a scoliotic patient, this work presents a method for the registration of vertebral column data using 3D magnetic resonance images (MRI) acquired in prone position and X-ray data acquired in standing position for five patients with scoliosis. The 3D shape of the vertebrae is estimated from both image modalities for each patient, and an articulated model is used in order to calculate intervertebral transformations required in order to align the vertebrae between both postures. Euclidean distances between anatomical landmarks are calculated in order to assess multimodal registration error. Results show a decrease in the Euclidean distance using the proposed method compared to rigid registration and more physically realistic vertebrae deformations compared to thin-plate-spline (TPS) registration thus improving alignment.
KeywordsAdolescent Idiopathic Scoliosis Magnetic Resonance Image Image Magnetic Resonance Image Data Registration Error Rigid Registration
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- 1.Cottalorda, Kohler, R.: Recueil terminologique de la scoliose idiopathique. In: Sauramps Medical (ed.) La scoliose idiopathique (sous la direction de J. Bérard et R. Kohler), pp. 33–40 (1997)Google Scholar
- 6.Cheriet, F., Dansereau, J., Petit, Y., Labelle, H., de Guise, J.A.: Towards the self-calibration of a multi-view radiographic imaging system for the 3D reconstruction of the human spine and rib cage. International Journal of Pattern Recognition and Artificial Intelligence 13(5), 761–779 (1999)CrossRefGoogle Scholar