9 Respiratory System Scintigraphy, Board exam review (missed questions) Flash Cards

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Title: 9 Respiratory System Scintigraphy, Board exam review (missed questions)
Description: 9 Respiratory System Scintigraphy, Board exam review (missed questions)
Number of Cards: 10
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Author: bobmcgill7
Created: 2012-01-02
Tags: (missed 9 board exam questions) respiratory review scintigraphy system
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    • Question
    • Answer
    • Side 3
    • 1. In general how many capillaries are blocked when a perfusion lung scan using 99mTc is performed?
      a. fewer than 1 in 1000
      b. < 0.1%
      c. both a and b
      d. none of the above
    • c
    • 4. The distribution of aerosol particles in the lungs is influenced by all of the following except:
      a. turbulent air flow
      b. amount of technetium added
      c. rate of air flow
      d. particle size
    • b
    • 9. What is the method of localization for a perfusion lung study?
      a. sequestration
      b. compartmental containment
      c. active transport
      d. capillary blockade
    • d
    • 12. Which radiopharmaceutical will be most useful in detecting delayed washout in a patient with COPD?
      a. 99m Tc MAA
      b. 99m Tc DTPA
      c. 81m Kr
      d. 133 Xe
      e. 99m Tc MAG3
    • d
    • 17. Increased risk of pulmonary embolism is associated with:
      a. smoking
      b. use of oral contraceptives
      c. recent surgery
      d. all of the above
      e. a and c only
    • d
    • 20. Lung quantification is often used to assist physicians in the diagnosis of pulmonary embolism.
      a. true
      b. false
    • b
    • 29. The capillaries surrounding alveoli have a diameter of:
      a. 0.3-1l.0 um
      b. 0.4-2.0 um
      c. 7.0-10.0 um
      d. 5.0-10.0 um
      e. 10.0-20.0 um
    • c
    • 31. Ventilation images are usually performed:
      a. with the patient supine so that the perfusion is relatively uniform throughout the lungs
      b. anteriorly, because more emboli occur anteriorly than posteriorly
      c. posteriorly to reduce soft tissue attenuation and decrease distance to detector
      d. with the patient erect, so that perfusion is relatively uniform throughout the lungs
    • c
    • 38. Only half of the administered dose of 99mTc DTPA aerosol is delivered to the patient.
      a. true
      b. false
    • b
    • 40. The liver may be seen in the washout phase of a ventilation study because:
      a. 99mTc DTPA aerosol was swallowed and then entered the bloodstream via the stomach
      b. 133 Xe gas is fat soluble
      c. particle size is too small
      d. air flow is turbulent
    • b