Japanese journal of radiology
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This study aimed to compare the tumor volume definition using conventional magnetic resonance (MR) and 11C-methionine positron emission tomography (MET/PET) images in the differentiation of the pre-operative glioma grade by using whole-tumor histogram analysis of normalized cerebral blood volume (nCBV) maps. ⋯ Whole-tumor histogram analysis of CBV map provides more valuable histogram parameters and increases diagnostic accuracy in the differentiation of pre-operative cerebral gliomas when the tumor volume is derived from MET/PET images.
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Langerhans cell histiocytosis (LCH) is a rare hematological disorder for which the utility of18F-FDG PET/CT is unclear. Our aim was to explore the metabolic features of LCH and the possible role of18F-FDG PET/CT in LCH evaluation. ⋯ 18F-FDG PET/CT seems to be useful for evaluating LCH when compared to conventional imaging, except in pulmonary cases. It can be used both for staging and restaging purposes.