The Diagnostic Value of ¹⁸F-FDG PET/CT Bone Marrow Uptake Pattern in Detecting Bone Marrow Involvement in Pediatric Neuroblastoma Patients

Figure 2

¹⁸F-FDG PET/CT bone marrow uptake pattern (BMUP). (a) BMUP1 was defined as direct invasion or being surrounded by adjacent tumor tissue (black arrow). (b) BMUP2 was defined as focal/multifocal uptake (white arrow), which was one or more (less than 30) restricted area(s) of FDG uptake. (c) BMUP3 was defined as diffuse and homogeneously increased FDG uptake within the skeleton. (d) BMUP4 was defined as diffuse and heterogeneously increased FDG uptake within the skeleton.

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