CT Housfield Units and Windowing

0:10 Image Production, Reconstruction
0:33 Linear Attenuation Coefficient
1:45 Back Projection
2:02 CT Numbers, Hounsfield Units
2:49 Calculating CT Numbers
3:37 Windowing
4:08 Window Width
6:09 Window Level
6:54 Combining Window Width and Window Level
Script and Audio-Only: drive.google.com/drive/folder...

[@danielking2604]

Thank u sir. U are a life saver. U made the concept easier to understand.

[@henningmarkotter5390]

Please have a look at 1:16 [min:sec]. When there is material with an attenuation coefficient larger than 1, then the attenuation would be more than 100%. The transmission is actually exp(-µd). With µ=0.181/cm the attenuation would be ~16.5%.

[@jkaisimm]

Solid. Thanks for the video! Very helpful as I read a chapter on head and neck CT imaging!

[@Galinator9000]

Clear explanation.👌

[@TheNettforce]

Thanks for sharing, very nice explanation

[@rongmoshal614]

Very good explanation

[@gurudattthakkar]

Very nice explanation

[@samuelvernon2397]

U should go step by step with bone and lung... especially when writing out number line

[@ashwanichaurasia3521]

Thank you

[@alexalex78]

Great video. Who assigns the the WW and L? Is it the same for all vendors/machines?

[@kaylasanchez9798]

I'm still confused... ugh and I plan on taking my registry soon

[@will_creene]

Good luck with your registry! In my opinion this is one of the trickiest concepts to grasp. It's something you will get a good grasp on as you work more with both CT and general xray.

[@chrissawyer69]

did you take it yet?