Figure 1

Maximum-intensity-projection images of 11C-acetate (upper row) and 18F- fluorodeoxyglucose (FDG) (lower row) positron-emission tomography (PET). Bone marrow involvement is shown as negative uptake, diffuse involvement, focal lesions, and diffuse + focal lesions from left to right. (Images by MIM Encore of MIM Software Inc., version number: 6.6.11_buildH213-00, URL: https://www.mimsoftware.com).