CT scans of the spine include vertebrae, intervertebral discs and the spinal cord. These tests are performed in an orderly protocol and allow for three-dimensional reconstruction of the vertebra in sagittal and coronal guides.

In spinal surgery, there are a number of navigation technologies based on CT scans performed before surgery (or during surgery) and identify the vertebrae (using special photographs or markers on the spine), such as Mazor with the Renaissance Robotic Surgical System used in hospitals, or BrianLab Which uses non-robotic navigation and is based on a marker located on the patient's back. These technologies are not optimal, and have a number of significant drawbacks: Because during spinal surgery, there is a displacement, the level of accuracy decreases as the surgery progresses. In addition, there is extensive use of radiation in these means since in many cases CT is performed before and during surgery.

Today, in the age of optical detection, it is possible to detect three-dimensional structures in photography and allow high levels of accuracy (less than 0.5 mm). Optical scanning does not include radiation and lasts the entire length of the operation. Of the patient and of the treating staff.

Inclusion Criteria:

• men and women
• 18 and above years old
• Patients who have available spinal CT tests will be included in the study
• Patients who are about to undergo spinal surgery

Exclusion Criteria:

• NA

Candidates for spinal surgery in the Orthopedics department at Hadassah medical center who have a previous CT scan of the spine. The participant will receive an explanation and will undergo a process of informed consent.