Table 3 Useful MR spectroscopy and MR perfusion criteria for transdiploic lesions
MR spectroscopy | MR perfusion | |
|---|---|---|
Meningioma | Alanine (1.47 ppm): specific ↑Glutamate+Glutamine ↑Cho/Cr ratio | ↑↑↑ rCBV (hipervascular) Slow-progressive return to baseline |
Hemangiopericytoma | Myoinositol: Specific No alanine ↑ Cho/Cr ratio | Similar to Meningioma (hypervascular) |
Lymphoma/small-blue round-cell | ↑↑↑ Choline +/− Lipids or lactate | Recovery curve ABOVE baseline Slightly ↑ CBV (ratio 1–1.5) |
Metastasis | ↑↑ Lipids (tumor necrosis) | Recovery curve BELOW baseline |