STEPS IN MRI IMAGING

There are four basic steps involved in MR imaging :
1.Placing the patient in a strong magnetic field.
2.Excitation process by sending a Radiofreqency signal through RF coils.
3.Relaxation process which sends back signals in RF coils.
4.Signal are send to computers for data processing and image display.

BASIC PHYSICS OF MRI

MRI stands for Magnetic Resonance Imaging.
MR imaging is based on imaging the hydrogen nuclei (or Proton) which is present in abundance in human body. Protons are positively charged particles and posses a rotatory movement called SPIN. Any charge which moves produce a current. Every current is associated with a small magnetic field around it. So every spining proton has a small magnetic field around it.