Understanding "Exposure" DICOM tags and their relations

Hello everyone,

Would love to get your help on something (couldn't find the answer in the sub history).

For the following DICOM tags related to Exposure - what are the exact units for each of them (e.g. mili Amper second, micro Amper, etc.):

Exposure
Exposure time
X-Ray Tube Current

What is the formula that connects these values?

I was guessing it should be - Exposure = Exposure time * Tube Current,

but this formula doesn't hold for the values I'm seeing inside the DICOM.

Is this formula completely off? Or just missing normalization values, and which?

submitted by /u/louis_imad
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source https://www.reddit.com/r/Radiology/comments/gti3a6/understanding_exposure_dicom_tags_and_their/

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