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Figure 2


Fig. 2 —Axial T2-weighted MR image through midgland of prostate in 68-year-old man with prostate-specific antigen value of 6.4 ng/mL and negative findings on one prior biopsy. No focal T2 signal abnormality is visible, but two (asterisks) of four highlighted MR spectroscopic imaging (MRSI) voxels show moderate choline elevation (spectral peaks labeled 1 for choline, 2 for creatine, and 3 for citrate), which is suspicious for malignancy. Cancer was found in right hemigland on subsequent biopsy. Although addition of MRSI to MRI was helpful in diagnosis of prostate cancer in this case, our study showed no overall incremental benefit.