|
CT scans are like hundreds of X-rays of a cross-section of your body. When using contrast of a radio opaque dye, it can determine soft tissue abnormalities, like a pulmonary embolism.
MRI uses a magnetic field to realign polar (i.e. water molecules) back and forth. That reorientation creates an image. It's why MRI is good for assessing soft-tissue injury, like a ligament tear. Conversely, bone does not image well on MRI due to lack of water molecules.
MRI has better spatial resolution than CT. Both have their benefits.
__________________
"When the Know-Nothings get control, it will read 'all men are created equal, except negroes, and foreigners, and Catholics.' When it comes to this I should prefer emigrating to some country where they make no pretense of loving liberty – to Russia, for instance, where despotism can be taken pure, and without the base alloy of hypocrisy.”--Abraham Lincoln
|