Tube Current Modulation (CT Physics)

[@karlwagner8905]

Thank you so much for your excellent videos!

[@HowRadiologyWorks]

You’re welcome thanks for dropping the note

[@bronevichok0507]

Thank you, great video.
Is there any way to calculate the power of the x-ray (in Watts) when the mA is modulated? I know the formula only for the constant mA (w*kVp*mA).Thanks

[@HowRadiologyWorks]

At any time point that formula is correct and if you want an average over time you can replace the mA in your formula with the average mA of the acquisition

[@bronevichok0507]

@@HowRadiologyWorks don't you know if I can find this average current somewhere in acquisition parameters on Siemens?

[@quicksilver15688]

Thanks for the nice video. Doesn't the tube current need some time to settle once modulated to a new value? Wouldn't this cause image artifacts?

[@HowRadiologyWorks]

The tube current modulations are typically smooth and continuous functions so they do not cause artifacts

[@johnal3358]

Great video.

[@HowRadiologyWorks]

Thanks

[@krazykrish3uk531]

Please do videos in mri .This way of teaching is good.please try to do it for mri as well

[@HowRadiologyWorks]

Thanks for your vote of confidence. I’m trying to round out the videos on X-ray first then I’ll see what I can do about MRI. I’m not as knowledgeable on mri but I can see.

[@amykallenberger3398]

So if humans were perfect cylinders with equal distribution of bone and other anatomy, mA modulation would not be needed 😮

[@HowRadiologyWorks]

Yeah as long as we were centered and circularly symmetric we wouldn’t need angular modulation. Thanks Amy for leaving your first comment.