The cotton gin was developed before the MRI, which was developed before steel, and steel was developed before the phonograph and DVD.
1981
Steel was develped first in the 13th century.
no
Yes, an MRI typically requires prior authorization from the insurance company before it can be performed.
MRI is a technique using the phenomenon Nuclear Magnetic Resonance [NMR}. NMR was discovered by physicists,Felix Bloch and Edward M Purcell and won Nobel Prize for the same. MRI was later developed by the scientists, Paul Lanterbur and Peter Mansfield.
Cochlear implants have magnets in them which interfere with the MRI process. The magnet from the implant will require removal before the MRI exam, but can be replaced after the scan. There are cochlear implants nowadays which can undergo medical procedures such as MRI's without removing anything.
It isn't.
Not always. Before a routine MRI scan no GFR test is needed. Some MRI scans will require an injection of a drug (contrast) which is used to highlight different aspects of blood supply. There is a small risk of this contrast affecting kidney function so some MRI centres test kidney function before administration. One such test is GFR
an MRI
an MRI
Yes, having a sewing needle embedded in the foot could be dangerous if you were to have an MRI. The magnetic field of the MRI machine could cause the needle to move or potentially injure the surrounding tissue. It is important to inform your healthcare provider or the MRI technologist if you have a foreign object in your body before undergoing an MRI.