  Understanding intertrochanteric fracture distribution is an important topic
in orthopaedics due to its high morbidity and mortality. The intertrochanteric
fracture can contain high-dimensional information including complicated 3D
fracture lines, which often make it difficult to visualize or to obtain
valuable statistics for clinical diagnosis and prognosis applications. This
paper proposed a map projection technique to map the high-dimensional
information into a 2D parametric space. This method can preserve the 3D
proximal femur surface and structure while visualizing the entire fracture line
with a single plot/view. Using this method and a standardization technique, a
total of 100 patients with different ages and genders are studied based on the
original radiographs acquired by CT scan. The comparison shows that the
proposed map projection representation is more efficient and rich in
information visualization than the conventional heat map technique. Using the
proposed method, a fracture probability can be obtained at any location in the
2D parametric space, from which the most probable fracture region can be
accurately identified. The study shows that age and gender have significant
influences on intertrochanteric fracture frequency and fracture line
distribution.
