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Fig. 12 | Insights into Imaging

Fig. 12

From: Multiparametric MRI: practical approach and pictorial review of a useful tool in the evaluation of brain tumours and tumour-like lesions

Fig. 12

Abscess. Conventional MRI: a, b T2W and post-contrast T1W sequences demonstrate a ring-enhancing mass lesion in the left frontal lobe with surrounding oedema. c, d DWI and ADC sequences show low ADC (600 × 10−6 mm2 s−1, arrow) throughout the lesion. e PWI demonstrates significantly lower perfusion (arrow) than the contralateral white matter. f, g MRS shows high lipid as well as the presence of amino acid (0.9–1.0 ppm), acetate (1.92 ppm) and succinate peaks (2.42 ppm). These characteristic MRS findings in combination with the very low ADC and low perfusion are diagnostic of abscess. Diagnosis was confirmed on aspiration which revealed colonies of gram-positive cocci

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