Typically virtual fluoroscopy systems display the tracked instruments as a projected shadow on a number of 2D x-ray images completely missing the depth information of the third dimension. This paper describes an extra tool for 3D reconstruction in virtual fluoroscopy which is useful to clarify the position of instruments or anatomy and can be used in planning and assessing surgical procedure without further x-ray images. Two examples are given: displaced subtrochanteric fracture and slipped upper femoral epiphysis is presented.
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