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Reutlinger, C; Gédet, P; Büchler, P; Kowal, J; Rudolph, T; Burger, J; Scheffler, K; Hasler, C (2011). Combining 3D tracking and surgical instrumentation to determine the stiffness of spinal motion segments: a validation study. Medical engineering & physics, 33(3), pp. 340-6. Amsterdam: Elsevier 10.1016/j.medengphy.2010.10.021
Broehan, A; Rudolph, T; Amstutz, C; Kowal, J (2011). Real-Time Multimodal Retinal Image Registration for a Computer Assisted Laser Photocoagulation System. IEEE transactions on biomedical engineering, 58(10), pp. 2816-24. New York, N.Y.: Institute of Electrical and Electronics Engineers IEEE 10.1109/TBME.2011.2159860
Steppacher, SD; Tannast, M; Zheng, G; Zhang, X; Kowal, J; Anderson, SE; Siebenrock, KA; Murphy, SB (2009). Validation of a new method for determination of cup orientation in THA. Journal of orthopaedic research, 27(12), pp. 1583-8. Hoboken, N.J.: Wiley 10.1002/jor.20929
Oszwald, M; Citak, M; Kendoff, D; Kowal, J; Amstutz, C; Kirchhoff, T; Nolte, L P; Krettek, C; Hüfner, T (2008). Accuracy of navigated surgery of the pelvis after surface matching with an a-mode ultrasound probe. Journal of orthopaedic research, 26(6), pp. 860-4. Hoboken, N.J.: Wiley 10.1002/jor.20551
Oszwald, M; Citak, M; Kowal, J; Amstutz, C; Kendoff, D; Kirchhoff, T; Nolte, L P; Krettek, C; Hüfner, T (2008). [A-mode ultrasonic pointer for navigated pelvic surgery]. Unfallchirurg, 111(3), pp. 162-6. Heidelberg: Springer-Medizin-Verlag 10.1007/s00113-007-1382-8
Oszwald, M; Citak, M; Kowal, J; Amstutz, C; Kendoff, D; Kirchhoff, T; Nolte, LP; Krettek, C; Hüfner, T (2008). A-Mode-Ultraschall-Pointer für die navigierte Beckenchirurgie. Unfallchirurg, 111(3), pp. 162-166. Heidelberg: Springer-Medizin-Verlag
Garcia Giraldez, J; Pappas, IPI; Kowal, J; Marti, G; Caversaccio, M (2007). Experimental validation of a new image-guided microscope with mounted mini-tracker. International Journal of Computer Assisted Radiology and Surgery, 1268(1), p. 1311. Berlin: Springer
Zheng, G; Kowal, J; Gonzalez Ballester, M.A.; Caversaccio, M; Nolte, L.P (2007). Registration techniques for computer navigation. Current orthopaedics, 21(3), pp. 170-179. Amsterdam: Elsevier 10.1016/j.cuor.2007.03.002
Garcia Giraldez, J; Caversaccio, M; Pappas, I; Kowal, J; Rohrer, U; Marti, G; Baur, C; Nolte, LP; Gonzalez Ballester, MA (2007). Design and clinical evaluation of an image-guided surgical microscope with an integrated tracking system. International Journal of Computer Assisted Radiology and Surgery, 1(5), pp. 253-264. Berlin: Springer 10.1007/s11548-006-0066-0
Loeffel, M; Kowal, J; Heini, PF; Burger, J; Nolte, L-P (2006). Development of an advanced injection device for highly viscous materials.
Steppacher, S.D.; Tannast, M; Zheng, G; Kowal, J; Siebenrock, K.A.; Murphy, S.B. (2010). Accuracy of CT-based computer-assisted total hip arthroplasty. In: Transaction of the 56th Annual Meeting of the Orthopaedic Research Society, New Orleans.
Reutlinger, C; Gédet, P; Kowal, J; Rudolph, T; Hasler, C; Büchler, P (2009). Computer-assisted intra-operative stiffness measurement od pinal motion segments.
Steppacher, SD; Tannast, M; Zheng, G; Zhang, X; Kowal, J; Anderson, SE; Siebenrock, KA; Murphy, SB (2009). Validation of a new method for determination of cup orientation in total hip arthroplasty.
Steppacher, SD; Tannast, M; Zheng, G; Zhang, X; Kowal, J; Siebenrock, KA; Murphy, SB (2009). Accuracy of CT-based computer navigated total hip arthroplasty.
Steppacher, SD; Tannast, M; Zheng, G; Zhang, X; Kowal, J; Murphy, SB (2009). Accuracy and reliability of measureing acetabular component orientation using 2D-3D matching technique.
Steppacher, SD; Tannast, M; Zheng, G; Zhang, X; Kowal, J; Anderson, SE; Siebenrock, KA; Murphy, SB (2009). Validation of a new method for determination of cup orientation using 2D/3D matching.
Reutlinger, C; Kowal, J; Burger, J; Hasler, C; Büchler, P (2008). In vivo measurements of the bending stiffness of the scoliotic spine. In: Journal of Biomechanics.
Reutlinger, C; Kowal, J; Burger, J; Hasler, C; Büchler, P (2008). In Vivo Measurements of the Bending Stiffness of the Scoliotic Spine. In: Proceedings of Computer Assisted Orthopedic Surgery International.
