Devices, systems, tools and methods are disclosed during diagnosis and treatment of spinal conditions. A cervical plumb line device is disclosed which can be used to produce a measurement of the sagittal vertical axis associated with a target part of a patients cervical spinal anatomy from two or more radiographic images. Also disclosed is an apparatus for measuring the angulation of a patients spinal anatomy relative to a cervical plumb line which uses a plurality of bolsters. A device that can be used to assist in implantation of an interbody device during spinal fusion device is also disclosed. Systems which produce geometric data describing optimized spinal fusion geometric at a spine level selected to receive spinal fusion.
