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Understanding "Exposure" DICOM tags and their relations

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Hello everyone,

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

​

  1. 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
  1. 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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