Murder by MRI

MRI

Murder by MRI

MRIMagnetic resonance imaging (MRI) machines are an effective, safe and painless way to take a look at the inside of a person. The way it works is, a doctor (usually) puts a person in a strong magnetic field and then they blast them with radio pulses.

The magnetic field puts a spin on a persons atoms and throws them out of alignment. As the atoms slowly re-align they give off their own signals which the machine detects and interprets. The different tissues realign in different orders so an MRI will give doctors a picture of the shapes in a person’s body and a picture of the material that makes up each shape.

Most people feel okay when they are in an MRI getting scanned but others feel a tingling or burning sensation, or a vibration along their skin. The process has come to be known as peripheral nerve stimulation. This is basically a changing magnetic field that can induce an electric current and that electricity can stimulate nerve activity.

This activity is minor when set at a low level, people just feel the prickling of their skin. If you crank that machine up to 50 percent higher than threshold level then those “prickles” start to hurt. The only nerves that this level affects are sensation receptors. So what else is run via nerve impulses? That’s correct, the heart, the most important muscle in our bodies.

If you were to get an MRI powerful enough, to the point were it can stimulate the heart and the diaphragm, two very critical systems for those of us who want to continue to live. As of right now, there is no need for an image produced using that kind of power which would put a person’s heart in danger but that doesn’t mean an MRI machine couldn’t do it.

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