What is an MRI?

Question

tried looking it up on wikipedia but they gave me all these technical terms and long words adn evrythng,

someone give it to me in basic talk...

what is an MRI?

and whiel ur at it wat is an CatSCan?

Answer 1

Magnetic resonance imaging (MRI) is an imaging technique used primarily in medical settings to produce high quality images of the inside of the human body. MRI is based on the principles of nuclear magnetic resonance (NMR), a spectroscopic technique used by scientists to obtain microscopic chemical and physical information about molecules. The technique was called magnetic resonance imaging rather than nuclear magnetic resonance imaging (NMRI) because of the negative connotations associated with the word nuclear in the late 1970's. MRI started out as a tomographic imaging technique, that is it produced an image of the NMR signal in a thin slice through the human body. MRI has advanced beyond a tomographic imaging technique to a volume imaging technique. This package presents a comprehensive picture of the basic principles of MRI.

A computerized axial tomography scan is more commonly known by its abbreviated name, CT scan or CAT scan. It is an x-ray procedure which combines many x-ray images with the aid of a computer to generate cross-sectional views and, if needed, three-dimensional images of the internal organs and structures of the body. A CT scan is used to define normal and abnormal structures in the body and/or assist in procedures by helping to accurately guide the placement of instruments or treatments. A large donut-shaped x-ray machine takes x-ray images at many different angles around the body. These images are processed by a computer to produce cross-sectional pictures of the body. In each of these pictures the body is seen as an x-ray "slice" of the body, which is recorded on a film. This recorded image is called a tomogram. "Computerized Axial Tomography" refers to the recorded tomogram "sections" at different levels of the body.

Imagine the body as a loaf of bread and you are looking at one end of the loaf. As you remove each slice of bread, you can see the entire surface of that slice from the crust to the center. The body is seen on CT scan slices in a similar fashion from the skin to the central part of the body being examined. When these levels are further "added" together, a three-dimensional picture of an organ or abnormal body structure can be obtained.

Answer 2

An MRI is basically like an X-ray, only instead of radiation, they use magnetic fields to look at your body. The magnets react with the iron in the blood, which then get translated into pictures the doctor can look at.

A CAT scan is similar to an MRI, but it uses X-rays, and takes a series of x-rays in slices, or cuts, and doctors can tell different things by how the x-rays pass through (or are blocked) by body structures.

Answer 3

MRI is Magnetic Resonance Imaging  or in simplest terms they put you in a big magnet turn it on and all the water in your cells and tissues line up like what a compass does when you hold a magnet to it.  then when you take the magnet away they go back to where they were.  when this happens the water molecules send out a tiny radio wave.  We then take all those radio waves and build a picture out of them.  There's a little more to it than that it uses more molecules than just H2O and dont leave out the foyer transform.  CT uses x-rays that shoot thru your body and create a picture

Answer 4

MRI scans use magnets to take images of the body.

CT (Cat scans) use x-rays to take similar pictures of the body.

There basically cameras used to take pictures of body parts like tumors, etc.