Sparse Representation for Different Animal Vertebra Classification along the Fixation Trajectory of Pedicle Screw

Figure 1

Schematic representation of the measurement system for the measuring spectrum on the vertebra bone model: 1, light source; 2, free-hand drilling probe; 3, CCD spectrometer; 4, computer; 5, porcine vertebra bone model; and 6, cross section of the probe.