c) Contrast medium

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Last updated 5:59 PM on 9/21/26
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4 Terms

1
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  • state the purpose of a contrast medium


  • to improve the visibility of structures with a low attenuation coefficient


2
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  • state the relationship between the attenuation coefficient of a substance and the atomic number of the substance for the photoelectric effect


  • attenuation coefficient directly proportional atomic number³


3
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  • state the average atomic number of soft tissues

  • state the atomic number of barium

  • state the atomic number of iodine

  • state what can be inferred about the relative attenuation coefficient from these atomic numbers


  • 7

  • 53

  • 56

  • barium/iodine are more absorbent than soft tissues


4
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  • state what internal system barium is typically used for

  • state what internal substance iodine is typically used for


  • the digestive system

  • liquids → blood