Back brace type surgery positioning apparatus and navigation system having the same

A navigation system, comprising:

• a back brace type surgery positioning apparatus, comprising:
• a back brace comprising a main board, an abdomen pressing board, a plurality of positioning members for connecting the main board and the abdomen pressing board, and a positioning base board disposed on the main board, wherein the main board has a support portion, an extending portion integrally formed with the support portion, and hollow portions formed at two sides of the support portion for facilitating a surgical operation, and the positioning base board is disposed on the support portion of the main board and has a plurality of positioning-assisting units;
• a positioning mechanism connected to the positioning base board, wherein the positioning mechanism comprises a support rack, and first and second rotating arms pivotally mounted to and rotatable with respect to the support rack and provided with a plurality of encoders for measuring displacement of the first and second rotating arms, and the second rotating arm is configured to secure a surgical tool in place;
• and
• an operation-assisting member fastened by the first and second rotating arms and configured to adjust a direction and a position of the surgical tool;
• and
• a computer device configured to store a plurality of computed tomography (CT) images of a back of a patient and electrically connected to the plurality of encoders for receiving displacement data from the encoders and integrating the displacement data with the CT images to thereby display the direction and position of the surgical tool.