[Rtk-users] Realistic Image Quality?

[Chao Wu]

What is the magnification factor of your geometry?

2016-06-27 23:56 GMT+02:00 Solomon Tang <solomoncztang at gmail.com>:

> Hi Simon,
>
> I am using RTK to simulate CT acquisitions using different detector sizes
> to see how this impact on image quality might change some of our in-house
> metrics.
>
> The images I have linked to below have been created using
> rtkforwardprojections with different projection spacings (0.3 isometric and
> 0.75 isometric) reconstructed with rtkfdk with the same pixel spacing and
> image dimensions (0.4688x0.4688x0.6 | 512x512x225). The CUDA projection
> stepsize is equal to the projection spacing. The window levels between
> images of their respective rows are the same.
>
> I am simply wondering if the differences between these images are
> realistic. I would expect the image with a detector size than is more than
> twice as large as the original would be drastically different when in fact
> they turn out to be incredibly similar. Are the assumptions made about
> projection spacing == cuda stepsize == simulated hardware detector size
> incorrect?
>
> <http://goog_1486088111>
> https://gyazo.com/e86436826f687a2db4b234699d050450
>
> https://gyazo.com/ca9612218f082e78ba3082950a27fa4c
>
> Solomon
>
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>
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