why we don't use electronic field for imaging of body tissues?

Question

why we dont use electronic field for imaging of body tissues?
imagine the body between two parallel metal plane,it makes an electronic condenser and the body works
as a dielectric for this condenser,every tissue has itself dielectric constant,and these planes are formationed
by very small metal squares,so by rotating these planes around the patient,we can calculate the constant of every
tissue and find out which tissue it is,it works better than X-ray radiography and even MRI

Answer 1

You know....that sounds almost plausible. You'd need many, many plates though - in the millions or thereabouts.

You'd also need to be able to rotate the structure in all 3 dimensions around the person.

The computational aspect would be very tricky also. I suspect that it would be possible to glean enough information from that sort of aparatus to make a picture of then inside of the body; using that information, though, would be quite challenging. It wouldn't be quite as straight forward as assigning a dielectric constant to a tissue, because the electric field would always be passing through multiple different tissue types no matter how you align it. You could still build up a 3 dimensional picture, but it would require using many data points for every 3d "pixel" of information in the image you're trying to build.

And people with epilepsy, heart conditions, and/or pacemakers wouldn't be able to use it.

Fascinating idea. I like it.

Answer 2

I think you are referring to the electro magnetic field produce from a magnetic device. You could subject the body to these field, but you could not abstract any information from these field.

Or if your idea is to have one plate producing the magnetic field and the other plate on the other side receiving these field with a human in the middle. Then the signal you received will either be too weak or being interrupted by the body own magnetic field, since we are talking about very weak magnetic field to begin with.

To "penetrate" the body, we are talking about energy waves oscillating at a high enough frequency. That's why we have ultra sound and X Ray which are operating at a frequency much higher than electro magnetic field can produce.

We are talking about frequency above human ears could pickup, ie. 20KHz and above.

Answer 3

hmm, I am a ct and xray and MRI tech, you don't make sense, and needs to be tested for patient safety, the most inportant factor, which you left out

Answer 4

Do you want to get fried?

Answer 5

That's already being done.