High prevalence of spondyloarthritis-like MRI lesions in postpartum women: a prospective analysis in relation to maternal, child and birth characteristics.

Objectives: Bone marrow oedema (BMO) on MRI of sacroiliac joints (SIJs) represents a hallmark of axial spondyloarthritis (SpA), yet such lesions may also occur under augmented mechanical stress in healthy subjects. We therefore sought to delineate the relationship between pregnancy/delivery and pelvic stress through a prospective study with repeated MRI. Results were matched with maternal, child and birth characteristics.

Tumor perfusion using first-pass F-18 FDG PET images.

Many reports in the literature have focused on FDG PET imaging at conventional (60 minutes after injection) or delayed (several hours after injection) intervals, which exploits increased glycolysis in tumors for diagnosis. However, in rapidly growing tumors, accelerated glycolysis is, among other factors, mediated by hypoxia and poor perfusion. Interestingly, first-pass (0-2 minutes after injection) FDG PET images were shown to provide an index of perfusion.