Figure 4. Antiparallel design and the effect on the area of triangles over the z-axis. Monte Carlo (MC) simulation for Root Mean Square error (RMS-e) suggested in the technical report that flipping one of the left or right panels of the Leksell G Localizer Frame (LF) would reduce targeting errors. For this reason, the areas of the triangles were analyzed for the parallel and antiparallel (inverted) N-localizer arrangements. Indeed, the antiparallel system insured uniformity of the area normal to the vertical axis (z) (left graph). Visually, it is observed that the triangles have more uniform areas (right image).

Leksell G, Leksell Stereotactic Frame, Elekta, Stockholm, Sweden

Courtesy of Ross Anderson, PhD