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The contents of the Reconstruction algorithm page were merged into Tomographic reconstruction. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. (2 April 2017) |
Apart from fig. 1, the indices are missing, and perhaps not correct. — Preceding unsigned comment added by 134.158.85.214 ( talk) 14:01, 14 February 2017 (UTC)
Did I forget my elementary maths or on figure 1: instead of ?
12:22, 13 February 2014 (UTC)
212.186.248.10 (
talk)
12:22, 13 February 2014 (UTC)
I'm not sure which distance you like to characterize with your formula. It looks to me like the radius of a centered circle.
In my opinion the picture is described insufficient and some more explanations would be good in general.
Eg. I assume that right in the first formula "I" stands for intensity, but nobdoy found it worth to mention.
Or it makes it more difficult that r is used in the pircture for a signed distance but also for a coordinate
The formula
describes the line that is marked with AB, in reference to the xy coordinate system.
θ is the angle of AB
r is the displacement of the line AB from the point of origin
My assumptions to the picture:
The line AB is normal to the projection plain.
The point of the xy origin represents the middle of the machine
The line AB represents the ray which is moved into direction of coordinate r.
The distance r is a signed distance. It changes the sign when AB passes the point of origin.
Don't you think that Radon's transformation is just one of methods used in tomographic reconstruction? Saigon from europe 21:28, 2 Jun 2005 (UTC)
These images were posted at the sinogram page, but as that is a disambiguation page I thought they belonged here. Someone with expertise in the subject can post them if you want ... Agradman ( talk) 18:36, 13 June 2009 (UTC)
I am a mathematician, but I found this article confusing to the point of being useless. In the diagram, the letter r is used for two entirely different objects, and it has yet a third different use in the alleged explanation. The formulas are not explained adequately. I make no sense of it.
This is far from my areas of expertise, so I am unable to attempt a fix. Someone please tag this article.
-- Solo Owl 18:04, 1 July 2014 (UTC)
The "ART based reconstruction" video is definitely an example of a filtered-backprojection where the backprojection is visualized step by step. — Preceding unsigned comment added by 2003:CA:A3E2:8000:4134:5826:CCE4:E3D9 ( talk) 21:22, 8 October 2016 (UTC)
In this equation,
what is ? MathPerson ( talk) 14:26, 15 October 2019 (UTC)
{{u|
Mark viking}} {
Talk}
17:59, 15 October 2019 (UTC)This article is rated C-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||
|
The contents of the Reconstruction algorithm page were merged into Tomographic reconstruction. For the contribution history and old versions of the redirected page, please see its history; for the discussion at that location, see its talk page. (2 April 2017) |
Apart from fig. 1, the indices are missing, and perhaps not correct. — Preceding unsigned comment added by 134.158.85.214 ( talk) 14:01, 14 February 2017 (UTC)
Did I forget my elementary maths or on figure 1: instead of ?
12:22, 13 February 2014 (UTC)
212.186.248.10 (
talk)
12:22, 13 February 2014 (UTC)
I'm not sure which distance you like to characterize with your formula. It looks to me like the radius of a centered circle.
In my opinion the picture is described insufficient and some more explanations would be good in general.
Eg. I assume that right in the first formula "I" stands for intensity, but nobdoy found it worth to mention.
Or it makes it more difficult that r is used in the pircture for a signed distance but also for a coordinate
The formula
describes the line that is marked with AB, in reference to the xy coordinate system.
θ is the angle of AB
r is the displacement of the line AB from the point of origin
My assumptions to the picture:
The line AB is normal to the projection plain.
The point of the xy origin represents the middle of the machine
The line AB represents the ray which is moved into direction of coordinate r.
The distance r is a signed distance. It changes the sign when AB passes the point of origin.
Don't you think that Radon's transformation is just one of methods used in tomographic reconstruction? Saigon from europe 21:28, 2 Jun 2005 (UTC)
These images were posted at the sinogram page, but as that is a disambiguation page I thought they belonged here. Someone with expertise in the subject can post them if you want ... Agradman ( talk) 18:36, 13 June 2009 (UTC)
I am a mathematician, but I found this article confusing to the point of being useless. In the diagram, the letter r is used for two entirely different objects, and it has yet a third different use in the alleged explanation. The formulas are not explained adequately. I make no sense of it.
This is far from my areas of expertise, so I am unable to attempt a fix. Someone please tag this article.
-- Solo Owl 18:04, 1 July 2014 (UTC)
The "ART based reconstruction" video is definitely an example of a filtered-backprojection where the backprojection is visualized step by step. — Preceding unsigned comment added by 2003:CA:A3E2:8000:4134:5826:CCE4:E3D9 ( talk) 21:22, 8 October 2016 (UTC)
In this equation,
what is ? MathPerson ( talk) 14:26, 15 October 2019 (UTC)
{{u|
Mark viking}} {
Talk}
17:59, 15 October 2019 (UTC)