In the past few months I have gotten an:
- MRI
- Ultrasound
- CT scan
- Full-body bone scan
- PET scan (in a few weeks)
This will mean I've been scanned by:
- Radio waves
- High-frequency sound
- X-rays
- Gamma rays
- Positrons (though really just gamma rays again)
That's a lot of things to be scanned by. Are there any I've missed?
Millimeter wave scans.
Microwave tomography.
I think I'll get the millimeter wave scan in a couple of weeks when I go to the airport.
The feline stare.
The feminine glare.
The adolescent glaze.
Have you had your aura read?
No matter how many ways there are to scam a person I'm sure Donald Trump knows them all. You said scan? Oh. That's different. Never Mind.
They used to do something you don’t hear much any more: exploratory surgery. I guess if they cut someone open to look, that would be light rays.
A miniaturized probe filled with miniaturized scientists injected into your carotid artery.
Also, bat radar.
Optical coherence tomography (infrared light, basically)... though you probably did have it at your last opticians appointment.
Fluorescent imaging is one you left off, with an injected agent that emits visible, IR, or UV light.
Also there's a similar scan to PET called SPECT that uses different imaging agents, but they still emit positrons. One type of SPECT scan you may have had or heard of is often called a bone scan.
Tricorder
"Positrons (though really just gamma rays again)"
Wait, what? Gamma rays aren't positrons; they're high energy photons, so they don't have a charge. Positrons are charged particles, in particular, anti-electrons.
The positrons annihilate with electrons in the body, producing gamma rays; it is those gamma rays that are detected.
Gravitational waves? Probably not going to find much, unless you swallowed a black hole.
Don't forget, the MRI is a big magnet, so strong magnetic field. Granted, that just aligns the atom's nuclei, it's the radio waves that flips them and is what gets measured.
MRIs are just (very) strong magnetic fields, in particular they watch magnetically aligned protons (in water) decay. There should absolutely no lasting effects from getting an MRI.
MRIs were originally NMRI (Nuclear Magnetic Resonance Imaging) but they dropped the N because no one wanted a “nuclear” facility in their neighborhood.
Don't forget the hand wave.
VQ Scan
EKG
EEG
Echocardiogram
Gamma rays and X-rays are basically the same thing. The only real difference is what the source is, not the photons themselves.