TECHNIQUE OF PROVIDING USER GUIDANCE FOR OBTAINING A REGISTRATION BETWEEN PATIENT IMAGE DATA AND A SURGICAL TRACKING SYSTEM

A method is provided, comprising: obtaining first patient image data of a patient's body; determining a registration instruction indicative of where to acquire a registration point relative to a surface of the body; obtaining second patient image data of the body, having been acquired by an augmented reality, AR, device; determining a transformation between coordinate systems of the first and the second patient image data; and based on the transformation, triggering display of the registration instruction on a display of the AR device such that a user of the AR device is presented an augmented view with the registration instruction being overlaid onto the patient's body, the augmented view guiding the user where to acquire the registration point. Also disclosed are a computing system, a surgical navigation system, and a computer program product.