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Question - Secondary Photons in Mammography

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Hi Everyone,

Just a quick question in terms of mammography.

If using a Mo/Mo anode/filter combination, I can't get my head around the idea that when you hit the K-edge (and above) on the filter, the photoelectric events will produce a bunch of similar energy photons as the original beam itself. Can somebody explain this? I understand why this isn't an issue in tissue's as the secondary photons from the photoelectric effect of say, calcium, are not penetrable enough to reach the detector.

Thank you

submitted by /u/HubrisBird
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source https://www.reddit.com/r/Radiology/comments/nfuamp/question_secondary_photons_in_mammography/
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