Tattoos and MRI scans

Before we discuss how tattoos interfere with MRI scans, I guess it is better to first understand MRI scans. MRI which stands for Magnetic Resonance Imaging is the procedure used in generating images or pictures of the inside of our bodies. These images or “slices” are used in the medical field as means of diagnosing unclear diseases such as infection of the brain, spine or tendonitis, Multiple Sclerosis, early stages of a stroke etc. The MRI machine uses a powerful magnetic force (produced by the machine) together with radio frequency pulses to send signals to our bodies which are in turn sent to a computer. The computer converts the mathematical data into an image that is used in medical diagnosis.

Studies have showed that these magnetic fields created by the MRI machines are so strong that even the weakest of them would end up using 0.5 tesla – which is 10,000 times more than the Earth’s magnetic field. As a result, even tiny metal objects such as stapler pins or paper clips may become dangerous weapons when left in the MRI room during a scan.

Now that you know all that about MRIs, let’s talk about how it all connects to tattoos. Approximately 20 years ago and maybe even more, the ink used in tattoos was sometimes made up of tiny metal particles and other such ingredients. This was back in the day – before the practice was regulated and before they gave the ink some serious attention (so we’re safe then!) Some patients that had tattoos from way back then have reported symptoms ranging from slight discomfort to severe pain while undergoing an MRI scan.

It is claimed that the magnetic force produced by the machine asserted such forceful pull on the metal bits in the ink that it caused the painful sensation in the tattooed area. Some theories maintain that the pain may have been caused because of the friction between the metal fragments. Some others have it that the particles were being pulled away from the tissue attempting to break the skin. In addition to all the pain, there are chances that you may be stuck with a huge bill as you resort to alternate procedures for more accurate information! These metal particles sometimes interfere with the signals leading to distortions in the MRI scans.

The good news in all this is that much has changed in the tattoo world since 20 years ago (making them safe for me!), there has been tremendous improvement in technique and technology, making the process safe for everyone since. If you happen to be one of those stuck with a tattoo from 20 years ago – don’t worry. Your doctor can advise you on alternate options for you.