Just to clarify.
X-ray (including CT) images using very high frequency electromagntic radiation. Good for imaging materials that differ greatly in density, for rxample, bone vs tissue, not much good for imaging different types of tissue. CT gives three dimensional image that can be sliced all ways.
Ultrasound images using high frequency compressional sound waves. Cheap, but resolution is not all that good, and like x-rays depends largely on differences in density, but also on elasticity, so better at imaging tissue than x-rays. An advantage is that it can show images in real time and the sensors can be moved to get the best image.
MRI, or magnetic resonance imaging, images using the properties of the atoms making up the object, in practice imaging the proportion of hydrogen, hence water, in the tissue. This makes it the optimum for imaging tissue differences. Resolution is also better than the other two, but at this stage there is possibly less expertise available to interpret the image.
John
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
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