Automatic vertebra tracking through dynamic fluoroscopic sequence by smooth derivative template matching

T. Cerciello, P. Bifulco, M. Cesarelli, M. Romano, R. Allen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Diagnosis of the underlying causes of widespread spinal pathologies such as back pain and whiplash remains problematic. Many studies suggest that segmental instability may occur and that the study of the intervertebral kinematics can be a valuable, objective method to assess spinal segment functionality. Direct measurement of the intervertebral kinematics results very invasive and unpractical; as alternative analysis of dynamic videofluoroscopic can provide intervertebral kinematic data of lumbar and cervical spinal tracts during unconstrained patient motion, with an acceptable low X-ray dose. Estimation of the kinematics relies on accurate recognition of vertebra positions and rotations on each radiological frame; this can be achieved identifying specific feature points or landmarks, but manual selection results tedious and imprecise. The aim of this work is to present an improved procedure and automatic identification of vertebra motion. By opportunely processing the radiological sequences by using smoothed derivative operators the main vertebral body outlines results enhanced; thus, procedures of template matching for vertebra location become more accurate. Furthermore, data interpolation provided sub-pixel accuracy. Kinematic data, obtained by processing real sagittal fluoroscopic sequences of the lumbar spine, were tested against results of previous studies obtained by manual identification and other methods. Time-evolution of intervertebral kinematic parameters resulted less variable than the other methods; root mean square differences and standard deviations were computed. Vertebra trajectories were interpolated by smoothing cubic spline and instantaneous speed and acceleration were computed. Vertebra speed and acceleration resulted more stable, smooth and in accordance with the actual motion preformed by patients.

Original languageEnglish
Title of host publicationFinal Program and Abstract Book - 9th International Conference on Information Technology and Applications in Biomedicine, ITAB 2009
DOIs
Publication statusPublished - 2009
Event9th International Conference on Information Technology and Applications in Biomedicine, ITAB 2009 - Larnaca, Cyprus
Duration: Nov 4 2009Nov 7 2009

Other

Other9th International Conference on Information Technology and Applications in Biomedicine, ITAB 2009
CountryCyprus
CityLarnaca
Period11/4/0911/7/09

Keywords

  • 2D intervertebral kinematics
  • Fluoroscopic sequences
  • Image processing
  • Lumbar spine
  • Template matching

ASJC Scopus subject areas

  • Computer Science Applications
  • Biomedical Engineering
  • Health Informatics
  • Health Information Management

Fingerprint Dive into the research topics of 'Automatic vertebra tracking through dynamic fluoroscopic sequence by smooth derivative template matching'. Together they form a unique fingerprint.

  • Cite this

    Cerciello, T., Bifulco, P., Cesarelli, M., Romano, M., & Allen, R. (2009). Automatic vertebra tracking through dynamic fluoroscopic sequence by smooth derivative template matching. In Final Program and Abstract Book - 9th International Conference on Information Technology and Applications in Biomedicine, ITAB 2009 [5394328] https://doi.org/10.1109/ITAB.2009.5394328