Portal Gravity


Portal Gravity is an FDA approved weight bearing simulation device for Lumbar and thoracic spine imaging.

The portal gravity system is an accessory for axial compression of the spinal column in and MRI for enhanced and more relevant diagnosis during research and clinical purposes. This device simulates weight bearing with the patient in a supine, recumbent position by placing a vest on the patient that has been loaded with a variable amount of downward tension. The tension is pulled toward the patient’s feet, simulating the weight held by the spine while the patient is upright. This allows for diagnosis of annular tears and herniated discs that are otherwise not visible when the patient is non–weight bearing. In some cases lumbar disc herniations are not visible on non–weight bearing studies, but are visible on these simulated weight bearing views. This process allows for a quicker, more thorough diagnosis, with faster treatment and recovery of the patient.

Indications for use of Portal Gravity System:

The Portal Gravity System is an accessory for axial compression of the spinal column in diagnostic imaging equipment for enhanced and more relevant diagnosis research and clinical purposes.

Contraindications/Exclusion criteria of Portal Gravity System:

  • Severe osteoporosis
  • Tumors of any kind (especially spine
  • Acute vertebral trauma
  • Cardiopulmonary disease
  • Severe osteoporosis
  • Trauma/Abuse
  • Acute shoulder injuries
  • Myofascia syndrome