Abstract：
:The three-dimensional geometry of the human spine is noteworthy information that can be obtained by stereoradiographic methods. These methods are based on the identification of anatomical structures in several views which are obtained by rotation of a patient standing on a turntable. Calibration algorithms for computer vision or photogrammetry are well documented, but they generally yield calibration devices which are cumbersome for the use in clinical stereoradiography. This paper presents a calibration method adapted to a two-view stereoradiography calibration (frontal and lateral incidences) and based on a simplified geometric modeling of the radiological environment. The a priori knowledge yields four calibration equations related to the vertical and horizontal planes of both views, leading to a specific calibration procedure and device. Moreover this device is attached to the stereoradiographic system (directly integrated on the turntable) in order to facilitate clinical applications. A validation was performed on 26 dried lumbar vertebrae in order to evaluate clinical situation. The mean accuracy of the stereoradiographic reconstruction was 1.2mm.
journal_name
J Biomechjournal_title
Journal of biomechanicsauthors
Dumas R,Mitton D,Laporte S,Dubousset J,Steib JP,Lavaste F,Skalli Wdoi
10.1016/s0021-9290(03)00016-2keywords:
subject
Has Abstractpub_date
2003-06-01 00:00:00pages
827-34issue
6eissn
0021-9290issn
1873-2380pii
S0021929003000162journal_volume
36pub_type
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