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Recommend a type of diagnostic image, with or without contrast for the following patients:

  • A patient with persistent lower back pain resistant to conservative interventions
  • A 74-year-old male with dyspnea, productive green phlegm, fever and chills, and malaise
  • A 48-year-old female who is 48-hours postoperative complaining of right-calf pain


  • When are computed tomography (CT) scans indicated?
  • When are magnetic resonance imaging (MRIs) indicated?
  • What helps the FNP decided whether to use contrast or not when ordering a CT scan or MRI?

at least 200 words

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