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In by 9 am and out by 10 with brain scan on CD
I went for my MRI today to help my ENT doctor evaluate what might be causing my hearing loss. I have had CT scans before for other parts of the body, but not a brain scan. You must be prepared (liquidate) and ready for a 1 hour experience into the land of claustrophobia. Basically, you lay down on a bed where they secure you feet and head. It’s comfortable enough. They provide a button to push if you need to, and you can hear them, that is, if you can hear. They feed your head into the chamber. I closed my eyes and prepared for a nap. You hear (even me with hearing loss) various sounds and can feel some small vibrations at times as you are bombarded with different frequencies. There is a cycle to the process. For me, the order was with and without contrast. Therefore, there were two cycles of no contrast. We had a time out for the injection of dye, and then there was a repeat of a second set of cycles. In the end, I popped up and out with a CD in hand to take to my doctor. Of course, with the reader built into the CD, I could view my brain at home, which I did. Without knowing what I am seeing, I was just fascinated at all of the layers of information as I scanned through the images. I could see some stuff that appeared to be fluid in my middle ear, but without training and knowledge of a physician, I would not begin to interpret it. I looked around to see if there was any indication of the time that the garage door fell onto my head. I would not know what a dent looks like, however.
“The MRI (magnetic resonance imaging) works like this: You create a very strong magnetic field which runs through the person from head to toe. This causes the spinning hydrogen atoms in the person’s body to line up with the magnetic field. Then you send a radio pulse at a special frequency that causes the hydrogen protons to spin in a different direction. When you turn off the radio pulse, the protons will return to their alignment with the magnetic field, and release the extra energy they took in from the radio pulse. That energy is picked up by the same coil that produced the energy, now acting like a three dimensional antenna. Since different tissues have different relative amounts of hydrogen in them, they give a different density of energy signals, which the computer organizes into a detailed three-dimensional image. This image is nearly as detailed as an anatomical photograph!
© Copyright 2003, 2009 C. George Boeree”



Most RecentMost Recommended Comments (1)
at 15:34 on June 19th, 2010
Did you see the Virgin Mary in my MRI brain scan?