Very good explanation!

@AndrewJReader

2 ай бұрын

Thanks for the feedback!

incredibly helpful video

@AndrewJReader

5 ай бұрын

Many thanks for the helpful feedback

Excellent explanation of the Fourier slice theorem and FBP with great visualizations, Andrew! Are you also planning a video on the pros and cons of FPB reconstruction in PET?

@AndrewJReader

Жыл бұрын

Thanks so much Georg, really appreciate the feedback! In other videos on iterative reconstruction I think I have mentioned the pros and cons of FBP, and when I do updated videos on iterative reconstruction I will seek to remember to mention why, and why not, one would use FBP. Thanks for the suggestion.

Hello Andrew, thanks for the amazing video I was constructing the image using LORs and then finding the interesction points of those straight lines. Is this a correct method ? Why is it less efficient ?

@AndrewJReader

9 ай бұрын

Thanks for the feedback. It sounds like you are describing backprojection without filtering, is that right? (If so, perhaps worth checking this video: kzread.info/dash/bejne/iouqq7qAcdWccpc.html). But if you are filtering, then backprojecting, that is fine. However, plotting just one value in the 2D k-space is equivalent to a whole line backprojection, and so a direct Fourier method is potentially more efficient. But interpolation in k-space needs great care, and so that's where things can potentially slow down.

@anshuchoudhary5454

9 ай бұрын

Thanks for you reply @@AndrewJReader. Actually after using this method, my value of FWHM is coming out to be in 10 mm-15mm range which is large for detector like LSO. Though I am filtering it out initially. Will the fourier method gives better resolution ?

@anshuchoudhary5454

7 ай бұрын

alright, i realised i was stupid back then. I was not doing the filtering right way. Thank you professor

@AndrewJReader

7 ай бұрын

@@anshuchoudhary5454 Hope the video was helpful!