CAMRT Radiography Practice Exam

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What is the weight/volume percentage of barium recommended for double contrast GI studies?

  1. 150%

  2. 200%

  3. 250%

  4. 300%

The correct answer is: 250%

The recommended weight/volume percentage of barium for double contrast gastrointestinal (GI) studies is typically around 250%. This concentration provides an optimal balance for enhancing the visualization of the GI tract through fluoroscopy or radiography. The higher concentration ensures that the barium adheres well to the mucosal surfaces, facilitating improved detail during imaging while also allowing for air to be introduced to create the necessary contrast. In double contrast studies, the goal is to have a clear outline of the barium-filled structure, so a concentration of approximately 250% helps achieve the ideal opacification. This level of barium also effectively highlights pathology or abnormalities within the GI tract, enhancing diagnostic accuracy.

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