Figure 7d:

¹H MR spectroscopy of pyogenic abscess in cerebellum. (a) Axial T2-weighted image shows well-defined hyperintense lesion with hypointense wall. (b) Axial T1-weighted image shows hypointense lesion with isointense wall. (c) Diffusion-weighted image shows restricted diffusion in lesion. (d) Postcontrast T1-weighted image shows ring enhancement. (e) In vivo ¹H-MR spectrum (3.0 T, PRESS, 3000/144, 128 repetitions) from center of lesion shows resonances of amino acids (AA, 0.9 ppm), lipid (Lip) and Lac (1.3 ppm), alanine (Ala, 1.5 ppm), acetate (Ac, 1.9 ppm), and succinate (Suc, 2.4 ppm). The resonances from alanine, Lac, and amino acids are inverted at the TE used owing to J evolution.