Projection generation

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Projection generation
Object/ Phantom f(x,y)
Sinogram, p(t,q)
q0
t
Projection, p(t,q0)
q
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Filtered backprojection
Ramp filter
Sum of all backprojections
One backprojection
Sinogram
Filtered sinogram
t
q
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Backprojection, movie
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A modern CT-system gives fanbeam projection data
X-ray source
Detector
Slip rings
Detector Electronics
High Voltage
Projektion data
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Advanced CT-system 2004

• 0.5 mm/voxel
• 2 r/s
• 64 detektor rows
• 64 rows 900 elements 1200 projections 2 r/s
  3 B 415 MB/s

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