Haha, not too sure about a song or anything, but I was in struggling with brain imaging techniques too :S
So I printed off a scan of each of the Techniques, so like a spect, pet, ct, etc. and then the eeg and tms, which really helps.
If your textbook has images, try and associate each technique with the image, because then you can visualise the image and that can help remember the details of each. The images can also tell you which scans are clearer and stuff like that.
Try and compare and contrast between the techniques and learn them in a more visual kind of way, like with venn diagrams, or simply noting things beside each image.
There's also videos on youtube that may assist (go on psyccounting's account, he's got good videos)
If worst comes to worst, then just rote learn.
Good luck
