b4 complete translation: the shockwave generator inadvertently made Kogasa, um, "know" the hospital gown.

Doctor, doctor! Can’t you take this survey, survey?

Which medical equipment do you want?
• Stethoscope
• EEG
• EKG meter
• Blood tester
• Gas chromatograph

Reader-added tags right now consist of “Pile bunker” and “A survey that seems useful for forensic investigation”.

An EEG would be nice to have (and I'm lucky enough to know a few researchers who routinely use them), especially considering that you could potentially rig it up for EKG work as well (as one of the three main measurement points for EKG is sometimes used as a reference measurement for EEGs).
Though, honestly, for all of the use an EEG would have in "lie detecting" you'd be just as well off making a convincing fake from some cheap hobby-store items, "connecting" the person up to it, and then seeing what they say afterward. I'd be more interested in other applications and research (Brain-Machine Interfacing, for example).
I mean, technically I have a two-lead EEG with the Neurowear-brand "Necomimi", but that's more of a novelty than anything else.