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CERN / TIGRE

TIGRE: Tomographic Iterative GPU-based Reconstruction Toolbox
BSD 3-Clause "New" or "Revised" License
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Image size in demos #425

Closed shaghayegh1376 closed 1 year ago

shaghayegh1376 commented 1 year ago

hi authors, in defining default geometry in TIGRE the image size is 256.256 but why in implementing algorithms we use head phantom with 64.64 image size?

AnderBiguri commented 1 year ago

Hi @shaghayegh1376

The size you want to use is completely arbitrary, you can use whichever you want. In the demos, sometimes we have small images just so they run fast on your computer, but feel free to change the size as much as you wish.

shaghayegh1376 commented 1 year ago

I appreciate your guidance Another question is that compared to the results of other articles using GPU, it seems that the execution time using this toolbox is a little longer. what is the reason

AnderBiguri commented 1 year ago

@shaghayegh1376 What do you mean "other articles"? The execution time will totally depend on your GPU, of course.

All the TIGRE times in all the TIGRE articles have been measured with as fast, or slower version of TIGRE than the current one, by me. In all TIGRE articles, you can also see which hardware I used.

shaghayegh1376 commented 1 year ago

I mean the results of articles about CBCT reconstruction algorithms using GPU. i got your point so it depends on system hardware . i am using NVIDIA GeForce RTX 3050

AnderBiguri commented 1 year ago

@shaghayegh1376 the RTX XX50 is the slowest GPU of any generation XX of NVIDIA GPUs, so its reasonable that you get slower performance.

shaghayegh1376 commented 1 year ago

how we can measure image quality for FDK? because with "Measure_Quality.m" function we can measure image quality in each iteration how we can measure image quality compare with ground truth

AnderBiguri commented 1 year ago

The quality measurement functions can be used given a ground truth. You can find them inside the utilities folder, in their own su folder. They just compute the parameter between the two inputs.

On Fri, 27 Jan 2023, 19:23 shaghayegh1376, @.***> wrote:

how we can measure image quality for FDK? because with "Measure_Quality.m" function we can measure image quality in each iteration how we can measure image quality compare with ground truth

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