Is there sometimes dye used in an MRI? What is this test used to diagnose/see versus for example a PET scan? TIA.
In: Technology
You can think of MRI as a tool which captures cross-sectional images which show the locations of different tissues (and fluids). It’s just that while if you were to slice a cross section (you sick f*ck), you’d see the colors of different tissues and fluids, and in an MRI image, everything is grayscale, and shade is determined by how “solid” or “rigid” the thing is, with the least solid stuff being darkest.
This is useful because, for instance a tumor, or a blood clot, or an active hemorrhage is thereby discernable from brain tissue, and the space inside the skull is very difficult and risky to perform exploratory surgery on just to see, or take a biopsy sample of.
The same way in which an X-Ray basically shows you the densities of stuff the radiation passes through, and you can use that to get a clear image of a broken bone without cutting flesh to get to it. Only MRI can help you differentiate between tissues.
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