The VMA™ (Vertebral Motion Analysis) is a functional diagnostic test for the spine that uses fluoroscopy to capture the spine in motion.

Key Features:

  • Fast, non-invasive test for assessing spinal instability
  • Fluoroscopy-based test, which can involve lower radiation dose levels to the patient as compared to plain x-ray imaging
  • Quantitative measurements which are more accurate and precise than those taken from end range x-ray images (data on file at Ortho Kinematics)
  • Controlled patient positioning to ensure consistent bending effort

What It Is: The VMA technology can assist in accomplishing three basic steps: (1) Patient Bending (2) Image Acquisition, and (3) Image Analysis.

Patient Bending The Key to the VMA™ innovation is the patented Motion Normalizer™ devices, which provide powered passive trunk bending in either a standing or lying configuration.

Image Acquisition As the Motion Normalizer™ bends the trunk through a set range of motion, hundreds of fluoro-images of the spine are captured at prescribed trunk bending angles.

Image Analysis Image recognition software locates the vertebrae on each frame. The Intervertebral Angle (IVA) is plotted as a function of the degree of trunk bending, creating a plot for each vertebral level.