Determination of axial vertebral rotation in MR images: comparison of four manual and a computerized method
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Axial vertebral rotation (AVR) of 14 normal and 14 scoliotic vertebrae from magnetic resonance (MR) images was determined by three observers using four manual methods and a computerized method, which were based on the evaluation of vertebral symmetry in two dimensions (2D) and in three dimensions (3D). The method of Aaro and Dahlborn proved to be the manual method with the highest intra-observer (1.7° SD) and inter-observer (1.2° SD) reliabilities, and was also most in agreement with the computerized method (1.3° SD, 1.0° MAD). The computerized method yielded higher intra-observer (1.3° SD) and inter-observer (1.4° SD) reliabilities than the manual methods, indicating it to be an efficient alternative for repeatable and reliable AVR measurements.
KeywordsSpine Axial vertebral rotation Magnetic resonance imaging Manual methods Computerized methods
This work has been supported by the Ministry of Higher Education, Science and Technology, Slovenia, under grants P2-0232, L2-7381, L2-9758, L2-2023, J2-0716 and J7-2246. The authors would like to thank R.Vengust (University Medical Centre Ljubljana, Department of Orthopaedic Surgery, Slovenia) and D. Štern (University of Ljubljana, Faculty of Electrical Engineering, Slovenia) for performing manual measurements.
- 12.Kouwenhoven JW, Bartels L, Vincken K, Viergever M, Verbout A, Delhaas T, Castelein R (2007) The relation between organ anatomy and pre-existent vertebral rotation in the normal spine: magnetic resonance imaging study in humans with situs inversus totalis. Spine 32:1123–1128. doi: 10.1097/01.brs.0000261563.75469.b0 CrossRefPubMedGoogle Scholar
- 20.Vrtovec T, Pernuš F, Likar B (2008) A symmetry-based method for the determination of vertebral rotation in 3D. In: Metaxas D, Axel L, Davies B (eds) Lecture Notes in Computer Science (LNCS): proceedings of the 11th medical image computing and computer-assisted intervention MICCAI 2008, Springer, New York, USA, vol 5241, pp 942–950. doi: 10.1007/978-3-540-85988-8