Comparison of 3-Dimensional Spinal Reconstruction Accuracy

Glaser, Diana; Doan, Josh; Newton, Peter O.

doi:10.1097/brs.0b013e3182518a15

Cited by 143 publications

(56 citation statements)

References 16 publications

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“…As this technique has been extensively described in previous papers, only the most important steps will be addressed in this paragraph [9]. The preliminary step is the manual identification of pelvic anatomical landmarks: two spheres are positioned on the acetabuli and a landmark on the sacral endplate.…”

Section: Reconstruction Processmentioning

confidence: 99%

“…Two-dimension analysis usually underestimates spine deformation [2] and is considered of limited reliability and accuracy in assessment of vertebral rotation [3][4][5][6][7][8]. Computed tomography (CT) and magnetic resonance (MR) scanning have been proposed as an alternative to quantify vertebral rotation [9,10]. However, as CT and MR are performed in a supine position, vertebral rotational information obtained may not accurately reflect deformation in the usual upright position [9,10].…”

Section: Introductionmentioning

confidence: 98%

“…Computed tomography (CT) and magnetic resonance (MR) scanning have been proposed as an alternative to quantify vertebral rotation [9,10]. However, as CT and MR are performed in a supine position, vertebral rotational information obtained may not accurately reflect deformation in the usual upright position [9,10]. Furthermore, the radiation dose associated with CT remains significant [11] [12], especially for children.…”

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

Patient-specific 3D models created by 3D imaging system or bi-planar imaging coupled with Moiré–Fringe projections: a comparative study of accuracy and reliability on spinal curvatures and vertebral rotation data

et al. 2016

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Section: Reconstruction Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Patient-specific 3D models created by 3D imaging system or bi-planar imaging coupled with Moiré–Fringe projections: a comparative study of accuracy and reliability on spinal curvatures and vertebral rotation data

et al. 2016

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“…1,2 High-resolution studies have quantified the kinematics of the lumbar spine in vitro, however the effect of active muscles and passive soft tissue tension are difficult to replicate, 3 which makes their correlation to the in vivo condition questionable. In vivo vertebral posture changes have been measured using computerized tomography (CT), 4 biplanar radiography, 5 magnetic resonance imaging (MRI), 6,7 and combinations of multiple imaging modalities. 8 The development of upright MRI machines has allowed for the study of in vivo postural changes in the bony elements and soft tissues of the spine in relevant and functional positions.…”

mentioning

confidence: 99%

An Endplate-Based Joint Coordinate System for Measuring Kinematics in Normal and Abnormally-Shaped Lumbar Vertebrae

Berry

Rodríguez‐Soto

Tokunaga

et al. 2015

Journal of Applied Biomechanics

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Vertebral level-dependent, angular, and linear translations of the spine have been measured in 2D and 3D using several imaging methods to quantify postural changes due to loading conditions and tasks. Here, we propose and validate a semiautomated method for measuring lumbar intervertebral angles and translations from upright MRI images using an endplate-based, joint coordinate system (JCS). This method was validated using 3D printed structures, representing intervertebral discs (IVD) at predetermined angles and heights, which were positioned between adjacent cadaveric vertebrae as a gold standard. Excellent agreement between our measurements and the gold standard was found for intervertebral angles in all anatomical planes (ICC > .997) and intervertebral distance measurements (ICC > .949). The proposed endplate-based JCS was compared with the vertebral body-based JCS proposed by the International Society of Biomechanics (ISB) using the 3D printed structures placed between 3 adjacent vertebrae from a cadaver with scoliosis. The endplate-based method was found to have better agreement with angles in the sagittal plane (ICC = 0.985) compared with the vertebral body-based method (ICC = .280). Thus, this method is accurate for measuring 3D intervertebral angles in the healthy and diseased lumbar spine.

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“…Acceptable intra-and inter-observer reliability of the modality was reported previously [1]. Spinal surgeons often use sacral slope (SS) and pelvic tilt (PT) as parameters to judge patients' pelvic alignments [2].…”

Section: Introductionmentioning

confidence: 99%

Pelvic Rotation and Inclination Affect Reliability of Sagittal Pelvic Alignment and Anterior Pelvic Plane Angle Measured by EOS System

Okamoto¹,

Tokunaga²

EPiC Series in Health Sciences

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Background: The Difficulties to obtain acceptable pelvic reference points on biplanar X-ray images for EOS measurements change as the patient's pelvis rotated or inclined. The aim of this study was to clarify the effects of pelvic Z-axis rotation (rotation) and X-axis rotation (inclination) on the measurement values of SS, PT, and APP angle by using of EOS. Methods: We obtained anteroposterior and lateral X-ray images of a trunk phantom which was rotated and inclined in standing position by using of the EOS. Sacral slope (SS) and pelvic tilt (PT) as parameters to judge patient's pelvic alignments by spinal surgeons, and anterior pelvic (APP) angle as a reference to decide patient's pelvic alignments by hip surgeons were measured with the EOS software. The values of SS and PT and APP angle were compared in the phantom rotation and inclination. Results: PT showed small changes when the phantom was rotated, however, SS decreased and APP angle increased when the phantom was rotated. The values of SS and PT dispersed at 30⁰ rotation among each inclination. APP angle dispersed at -15º and 30º of rotation among each inclination. Conclusion: Measurement variations of SS and PT were small amount under 15 degrees of rotation and inclination. On the contrary, APP angles showed greater variations when the phantom was rotated and inclined. Proper positioning of subjects, by reducing rotational effects, is important to get constant reproducible measurements, even if we use EOS system.

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Comparison of 3-Dimensional Spinal Reconstruction Accuracy

Cited by 143 publications

References 16 publications

Patient-specific 3D models created by 3D imaging system or bi-planar imaging coupled with Moiré–Fringe projections: a comparative study of accuracy and reliability on spinal curvatures and vertebral rotation data

Patient-specific 3D models created by 3D imaging system or bi-planar imaging coupled with Moiré–Fringe projections: a comparative study of accuracy and reliability on spinal curvatures and vertebral rotation data

An Endplate-Based Joint Coordinate System for Measuring Kinematics in Normal and Abnormally-Shaped Lumbar Vertebrae

Pelvic Rotation and Inclination Affect Reliability of Sagittal Pelvic Alignment and Anterior Pelvic Plane Angle Measured by EOS System

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