Fig. 6From: Novel method using DW-MRI and ADC images to guide stereotactic biopsy for the diagnosis small primary angiitis of the central nervous system: a case reportIn single-volume spectroscopy–magnetic resonance spectroscopy (SVS–MRS) images before surgery, the MRS content of choline (Cho) and the Cho/creatine (Cr) ratio were increased, whereas the N-acetyl aspartate (NAA) content declined slightly within the same area. A MRS graph of each metabolite and the locations of each single volume. B Table of each metabolite and their ratios to CrBack to article page