Indications for use of CT  


As discussed earlier in this learning module, bones are well seen and evaluated with radiography. There are, however, instances in which CT is indicated for further evaluation or problem solving. This occurs most commonly in some complex intraarticular fractures of the hip, ankle, and knee. CT is also used in cases of tumor when the tumor may be infiltrating into the bone.

Note in the radiograph of the knee on the left, the fracture of the proximal tibia is easily seen. The CT image on the right is a coronal reformat of a CT of the knee. Note that the complexity of the fracture is shown with greater detail on the CT image. It is easier to see that there are numerous fracture lines and that the fracture lines extend through the epiphysis into the knee joint space. This information will impact how this fracture is treated.