ECSE-4540 Intro to Digital Image Processing
Rich Radke, Rensselaer Polytechnic Institute
Lecture 19: Fan-beam reconstruction (4/16/15)
0:00:02 Parallel beams vs. fan beams
0:03:07 Fan-beam projection geometry and notation
0:06:10 Each fan beam is also a parallel beam
0:09:40 Review of filtered backprojection
0:12:35 Change of coordinates: Cartesian to polar
0:15:38 Change of coordinates: parallel- to fan-beam
0:20:32 Simplifying the integral with observations about the geometry
0:28:54 One more simplification
0:33:01 Putting it all together: filtered backprojection for fan beams
0:35:51 A fast approximation: re-sorting fan beams into parallel beams
0:41:55 Fan-beam functions in Matlab
0:43:31 Modern CT geometries: helical and cone-beam CT
Follows Section 5.11.6 of the textbook (Gonzalez and Woods, 3rd ed.).
Негізгі бет DIP Lecture 19: Fan-beam reconstruction
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