<div dir="ltr">What is the magnification factor of your geometry?</div><div class="gmail_extra"><br><div class="gmail_quote">2016-06-27 23:56 GMT+02:00 Solomon Tang <span dir="ltr"><<a href="mailto:solomoncztang@gmail.com" target="_blank">solomoncztang@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Simon,
<div><br></div><div>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. </div><div><br></div><div>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. </div><div><br></div><div>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?</div><div><a href="http://goog_1486088111" target="_blank"><br></a></div><div><a href="https://gyazo.com/e86436826f687a2db4b234699d050450" target="_blank">https://gyazo.com/e86436826f687a2db4b234699d050450<br></a></div><div><br></div><div><a href="https://gyazo.com/ca9612218f082e78ba3082950a27fa4c" target="_blank">https://gyazo.com/ca9612218f082e78ba3082950a27fa4c</a><span class="HOEnZb"><font color="#888888"><br></font></span></div><span class="HOEnZb"><font color="#888888"><div><br></div><div>Solomon</div></font></span></div>
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