Recent developments in MR-based whole-body PET/MR attenuation correction allow for adding bone information and for eliminating truncation artefacts along the patients’ arms using the HUGE technique. 43 patients underwent a PET/MR whole-body examination. The PET SUVmax of 57 active lesions were measured for PET data reconstructed with four different µmaps: standard, standard+bone, standard+HUGE, and standard+bone+HUGE. Compared to the standard-µmap, the mean SUVmax of all 57 lesions increases by 14%±12% when adding bone, by 17%±12% when adding HUGE, and by 24%±19% when adding bone+HUGE. These results are an important step towards improved MR-based attenuation correction in whole-body PET/MR hybrid imaging.