Click on image to view larger version.
FIGURE 5. Radiographic (left) and 18F-FDG (right) images. (A) Femoral component of right hip hemiarthroplasty—which is, as radiograph illustrates, several centimeters long—appears as well-defined photopenic region with BPI activity along its lateral margin on 18F-FDG image. (B) Intramedullary components of this total knee replacement, as illustrated in radiograph, are considerably smaller than femoral component of hip prosthesis in A. Intramedullary stem of tibial component (arrowhead) is only about 2–3 cm in length, whereas intramedullary portion of femoral component (arrow) is only about 1 cm in length. Intramedullary stem of tibial component along with adjacent BPI activity (arrowheads) is identifiable on 18F-FDG image. Intramedullary part of femoral component cannot be identified (same patient as illustrated in Fig. 4B).
