Method for detecting positions of tissues and apparatus using the same

A method for detecting positions of tissues, comprising:

• prior to surgery, acquiring a first image associated with a target bone of surgery in a first coordinate system;
• measuring position values of multiple points on a surface of the target bone of surgery in a second coordinate system, and performing a first position registration between the first coordinate system and the second coordinate system with respect to the first image;
• acquiring a second image regarding the remained bone after cutting in the second coordinate system by applying the shape of the bone changed according to the progression of bone cutting to the first image;
• acquiring the second image in the first coordinate system by using a level of the progression of bone cutting;
• and
• performing a second position registration with the second image defined on the first coordinate system and the second image defined on the second coordinate system;
• wherein the first coordinate system is a coordinate system on which an image of the target bone of surgery that is examined in advance before surgery is defined, and the second coordinate system is a coordinate system regarding the bone existing in surgery room.