A New CT Based Method for Post-operative Motion Analysis of Pelvic Fractures

Conventional X-ray is commonly used for pelvic fracture follow-ups, but has a precision of only ± 5 mm. Implantation of tantalum beads together with RSA has shown high precision but not applicable in clinical practice. CT scan has been shown a suitable substitute for RSA to follow the metal markers....

Full description

Saved in:
Bibliographic Details
Published in:3D research 2019-03, Vol.10 (1), p.1-9, Article 7
Main Authors: Bakhshayesh, Peyman, Olivecrona, Henrik, Weidenhielm, Lars, Enocson, Anders
Format: Article
Language:English
Subjects:
3DR Express
Beads
Bone registration
Clinical medicine
Computed tomography
Computer Imaging
Confidence intervals
Engineering
Fractures
Implantation
Lasers
Markers
Medical imaging
Optical Devices
Optics
Pattern Recognition and Graphics
Pelvis
Photonics
Reproducibility
Signal,Image and Speech Processing
Tantalum
Vision
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Conventional X-ray is commonly used for pelvic fracture follow-ups, but has a precision of only ± 5 mm. Implantation of tantalum beads together with RSA has shown high precision but not applicable in clinical practice. CT scan has been shown a suitable substitute for RSA to follow the metal markers. We aimed to assess whether implantation of metal markers could be avoided using CT scan and merging of bone surface anatomy. A human cadaveric pelvis marked with 0.8 mm tantalum beads was fixed over the symphysis and the right SI-joint. Left hemi-pelvis was subsequently distracted using plastic spacers. Sequential CT exams was conducted and data were analyzed using Sectra ® (Sectra AB), CTMA package. Examinations were repeated after 2 weeks. Bone registration showed better precision than registration based on tantalum beads. However, only the difference in angular changes was statistically significant ( p  = 0.008). The confidence interval of the repeatability was ± 0.5 mm for translation and ± 0.5° for rotation. This new non-invasive technique showed good precision and repeatability and might be a future option in clinical practice for post-operative follow-ups of patients with pelvic fractures.
ISSN:2092-6731
2092-6731
DOI:10.1007/s13319-019-0217-z