Search Strategy and Results from PubMed as of December 12, 2009
| Step | Search string | No. of articles |
| 1 | Fluorodeoxyglucose OR 2-fluoro-2-deoxy-d-glucose OR FDG OR PET OR Positron emission tomography OR PET | 48,943 |
| 2 | Magnetic resonance OR MR imaging OR MRI OR Magnetic resonance tomography OR Nuclear magnetic resonance OR NMR | 433,871 |
| 3 | Diffusion | 109,642 |
| 4 | Step 1 AND 2 AND 3 | 355 |