So, the higher energy rays are absorbed by the Mo filter (due to the increase of the cross section of the photo electronic phenomenon at that energy) which then yields back the characteristic x rays and the low energy rays are absorbed due to the width of the filter (the same thing that happens with the Al filter). So we are left with mostly the characteristic radiation.
I believe that the low energy rays are absorbed due to the width of the filter, as it happens with any other filter in an x ray tube. Like the Al filter. At low energies the photoelectric phenomenon is stronger and most of the radiation is absorbed.
Because characteristic x rays have uniform energy while the bremstruhlung do not and if we want a good mammo image we are supposed to irradiate breast tissue(which is mostly soft tissue) with uniform energy to obtain a good contrast
So, the higher energy rays are absorbed by the Mo filter (due to the increase of the cross section of the photo electronic phenomenon at that energy) which then yields back the characteristic x rays and the low energy rays are absorbed due to the width of the filter (the same thing that happens with the Al filter). So we are left with mostly the characteristic radiation.
Why Rho target Moly Filter is not used?
Thank you so much for the video! Was really struggling with this concept but I think it has clicked now!
Anyone knows how to measure snrin^2 for calculating DQE in mammography? But with spesific kvp and type of filter which is not available in the book
So how have the lower energies been filtered in this spectrum. With Al filters?
Yes through inherent filtration
I believe that the low energy rays are absorbed due to the width of the filter, as it happens with any other filter in an x ray tube. Like the Al filter. At low energies the photoelectric phenomenon is stronger and most of the radiation is absorbed.
I love you man! Great videos!
Why we not using rhodium target and molybdenum filter sir
This is because the high attenuation beyond the k edge of the Mo filter occurs at the characteristic x ray energies of Rh
Thank you
Why characteristics x ray are used in mammography?
Because characteristic x rays have uniform energy while the bremstruhlung do not and if we want a good mammo image we are supposed to irradiate breast tissue(which is mostly soft tissue) with uniform energy to obtain a good contrast