How are u ?
please help me
What is Physical Principle for CT ( Computed Tomography ) ?
It's just a series of 1d x-rays
You shoot an x-ray through the victim at a range of angles
You then divide the body into a series of boxes (in a computer) and work out what density you would out in each box so that a ray through a line of boxes gives the same total absorption as you measured with the x-ray along that same line
The details of how you do the sums depends on the system, but it's basically just a matrix inversion
Good summary by mgb. For lots more reading:
(but keep in mind that some of that article may be controversial -- I think mainly in the safety area, but maybe in other areas too).
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