A 3T MRI scan or 3 Tesla Magnetic Resonance Imaging is a common procedure which is used in diagnoses of the lumbar spine or other organ problems. Tesla is a unit of measurement of magnetic strength by the MRI machines. In this scanning procedure, the magnetic waves are used to produce detailed images of the spine regions. MRI scan is a painless procedure and is not invasive. It is a safer procedure which does not use radiation. A 3T MRI scan machine is, however, more expensive but produces better quality images at a faster pace. A patient has to lie on an examination table and then it slides inside an MRI machine which seems like a large doughnut.