<human>:  What is the difference between MRI and CT scans?
<bot>: The main difference between MRI and CT scans is that MRI uses magnetic fields and radio waves to generate images, while CT scans use x-rays to generate images. MRI scans are more detailed and allow for the visualization of various tissue types, where as CT scans provide more detailed images of bone structures. Additionally, CT scans are faster, but MRI scans provide a better clarity of the soft tissues in the body.