Everything you need to know about Computed Tomography (CT)

Ask the Fish

CT Protocols

  • Optimization of CT Protocol and Protocol Design: How We Do It Part 1

    Elliot K. Fishman, MD

  • Optimization of CT Protocol and Protocol Design: How We Do It Part 2

    Elliot K. Fishman, MD

  • Protocol Design in Abdominal CT

    Pamela T. Johnson, MD

  • Post Test Questions

    1.  When scanning a patient for pancreatic cancer staging, which of the following protocols is appropriate?
    1.   Arterial and venous phase
    2.   Non contrast, arterial and venous phase
    3.   Venous and delayed phases
    4.   Venous phase only

    2.  What factor is most closely related to an increased incidence of contrast extravasation?
    1.   needle placed in the hand
    2.   injection rate of 4cc/sec
    3.   warming of the contrast pre-use
    4.   18 vs 20g needle in antecubital fossa

    3.  What patients typically don’t need to have their creatinine levels checked before a contrast enhanced CT?
    1.   patients under the age of 30 years old
    2.   patients with a solitary kidney
    3.   patients over age 60
    4.   patients with a history of well controlled diabetes

    4.  Regarding cardiac CT which statement is false?
    1.   a calcium scoring study with an Agaston score of zero means normal coronary arteries
    2.   cardiac CTA in the ER has a 99% negative predictive value for significant disease
    3.   cardiac CTA can lead to a decrease in the number of negative coronary artery catheterizations
    4.   cardiac CTA needs at least a 64 MDCT to achieve the success as published in the literature

    5.  Which of the following is not an accepted application for dual energy CT?
    1.   gout analysis
    2.   automated bone removal
    3.   virtual non-contrast CT
    4.   virtual contrast enhanced CT


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