Difference between revisions of "CT x-ray scanner"
From Noah.org
Jump to navigationJump to search| Line 13: | Line 13: | ||
|+ Relative position of each scan slice | |+ Relative position of each scan slice | ||
|- | |- | ||
| − | | The target and four 1 dimensional sections. The position of the sections corresponds to the angle of projection. | + | | The target and four |
| + | 1-dimensional sections. | ||
| + | The position of the | ||
| + | sections corresponds to | ||
| + | the angle of projection. | ||
| [[image:target.png]] || [[image:section_4_0.png]] | | [[image:target.png]] || [[image:section_4_0.png]] | ||
|- | |- | ||
| [[image:section_4_3.png]] || [[image:section_4_2.png]] || [[image:section_4_1.png]] | | [[image:section_4_3.png]] || [[image:section_4_2.png]] || [[image:section_4_1.png]] | ||
|} | |} | ||
Revision as of 08:59, 13 December 2007
CAT Scanning
Here are some sample images that illustrate the process. The algorithm is quite simple.
In a real CAT Scan system the 1 dimensional slices would be taken from the horizontal row of a series of x-rays. In this demo I don't yet have the x-rays to work with so I synthesize the 1D bands from the target image that I want to regenerate. So given a target image I generate a series of 1D radial slices by rotating the target image and then averaging all values in the rows of the image. Then I rotate the slice back to the original angle.
Slices are synthesized from a 180 degree rotation of the target image.
| The target and four
1-dimensional sections. The position of the sections corresponds to the angle of projection. |
 |
|
 |
 |
|
