neutron imaging circular mtf siemens star

One way around this might be cutting wedges individually, then placing them together, but then alignment is tricky. if you make a Siemens star out of some metal or plastic with waterjet, machining, wire erosion, etc., always the cut-out will have some curvature on the order of 0.5-1 mm at the inner 'corner', on the same order as what I guess the system will achieve, so it will not give valuable information. thermal neutrons or X-rays, where a very thin structure can be used and still obtain a decent attenuation), which means the center of the star will have some rounded edges depending on how it's manufactured. To evaluate the resolution of your radiography system, I don't think a Siemens star makes much sense because it should be reasonably thick (unlike e.g. I can offer my thoughts on this topic, for whatever they are worth: Once I get some shots taken I will send out the data and see what the group thinks is a good way to process it. Since we don’t have any standard methods to perform this measurement, anything is fair game, except for aligning to the pixel row as you mention, that’s just cheating! I am hopeful we, as a group, can come up with some standard ways to measure the resolution, L/D, etc, just like we have for ASTM thermal neutron imaging.

I had hoped a printed Siemens star would come out pretty nicely but perhaps after reading your description it wouldn’t be the best. Thank you for the message, you point out lots of good information in there! I have our machinist working on a couple edges for simple flat and square pieces currently using steel and aluminum to start with.

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Neutron imaging circular mtf siemens star