One important advantage of using LAFOV PET/CT for imaging SP 89 sp Zr-labelled monoclonal antibodies (mAbs), i.e., immunoPET, is the substantial increase in sensitivity compared with standard axial field-of-view (SAFOV) PET/CT systems, which may lead to a remarkable image quality improvement. This article is part of the Topical Collection on Image of the month Long axial field-of-view (LAFOV) PET/CT scanners have been introduced recently [[1]], which offer numerous advantages [[3]]. Both patients were informed about the study aims, procedures (one additional PET/CT scan on the same day with the planned PET/CT), and the need to acquire an additional low-dose CT scan.