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[LAILA370]

Okayy my question is that
what if someone had a stent put .. and when they want for a MRI the doctors couldnt see the stent?
what is that supose to mean?
is it something to be scared about?




This discussion is related to Stent longevity and homocysteine.

[ed34]

You would think it would be detected being metal. Working with strong magnets, an MRI scan can be dangerous with stents, it can even make them very hot. Before an MRI the technician has to be told the type of stent/s in the patient, which included the manufacture, model etc. Also the size has to be known. The technician then adjusts the sensitivity of the MRI scanner so no danger to the stent is presented. Maybe the scanner was adjusted to a level where it was unable to detect the stent.
An Mri works by passing a magnetic field through the body. Our bodies contain billions of Hydrogen atoms which rotate on a normal axis. When the magnetic field hits them, the axis changes. Then the magnetic field stops and the atoms can return back to their normal axis. They now admit a radio signal and this is what's detected to make up the images. Higher density tissue takes longer for the hydrogen atoms to realign, so the images of the body are gradually built up, showing all different tissue types. It used to take hours with the first scanners what takes seconds with todays machines.

Just some extra info which I thought some might find interesting.