Talk:Magnetic resonance imaging: Difference between revisions
imported>Matt Lewis (→neuroimaging: new section) |
imported>Howard C. Berkowitz (→The piece of the pictue that I miss: new section) |
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I added this red link (as an uncreated article - is it the best term?) - I won't be creating it though. If anyone else wants to... --[[User:Matt Lewis|Matt Lewis]] 00:44, 31 March 2008 (CDT) | I added this red link (as an uncreated article - is it the best term?) - I won't be creating it though. If anyone else wants to... --[[User:Matt Lewis|Matt Lewis]] 00:44, 31 March 2008 (CDT) | ||
== The piece of the pictue that I miss == | |||
Your section on how various weightings and gradients return information of different brighness or color is very helpful. What still puzzles me about MRI, vs. CT ad SPECT, is that in the latter, there is a narrow collimated beam that is "spread" over a limited angular range--i.e., tomography. I have at least a conceptual grasp of how the image is built from the set of tomographic images. | |||
As far as I know, magnetic and RF fields cannot be collimated to anywhere close to the precision of collimated ionizing ratioactive. The thing I don't yet grasp in MRI is how the image is formed form the individual images. Can you help define that, preferably comparing it with SPECT and CT? [[User:Howard C. Berkowitz|Howard C. Berkowitz]] 03:46, 29 July 2008 (CDT) | |||
Revision as of 02:46, 29 July 2008
neuroimaging
I added this red link (as an uncreated article - is it the best term?) - I won't be creating it though. If anyone else wants to... --Matt Lewis 00:44, 31 March 2008 (CDT)
The piece of the pictue that I miss
Your section on how various weightings and gradients return information of different brighness or color is very helpful. What still puzzles me about MRI, vs. CT ad SPECT, is that in the latter, there is a narrow collimated beam that is "spread" over a limited angular range--i.e., tomography. I have at least a conceptual grasp of how the image is built from the set of tomographic images.
As far as I know, magnetic and RF fields cannot be collimated to anywhere close to the precision of collimated ionizing ratioactive. The thing I don't yet grasp in MRI is how the image is formed form the individual images. Can you help define that, preferably comparing it with SPECT and CT? Howard C. Berkowitz 03:46, 29 July 2008 (CDT)