Physics 2 Quiz 4.1

15 Questions | Total Attempts: 32

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Physics Quizzes & Trivia

Questions and Answers
  • 1. 
    Peripheral Gating uses a photo-sensor attached to the patient’s finger to detect the increase in blood volume in the capillaries.
    • A. 

      True

    • B. 

      False

  • 2. 
    MRI techniques to enable vascular visualization of vessels include all of the following except:
    • A. 

      Subtraction techniques (acquired during systole and diastole – then subtracted) to allow for visualization of vascular structures

    • B. 

      Gradient echo sequences with gradient moment nulling (for bright blood)

    • C. 

      Spin echo acquisitions with spatial pre-saturation (for black blood)

    • D. 

      Inversion recovery techniques for visualization of vessels when fat or water is suppressed

  • 3. 
    Inversion recovery techniques for visualization of vessels when fat or water is suppressed
    • A. 

      True

    • B. 

      False

  • 4. 
    MRA techniques to visualize blood include all of the following except:
    • A. 

      TOF-MRA

    • B. 

      Digital subtraction MRA

    • C. 

      CE-MRA

    • D. 

      TSE

    • E. 

      PC-MRA

  • 5. 
    Since flowing blood appears the same on various types of pulse sequences, conventional MRI can by used to evaluate vascular structures.
    • A. 

      True

    • B. 

      False

  • 6. 
    In an attempt to acquire images with high spatial resolution in acceptable imaging times, CE-MRA’s are acquired with fast, 3D T2 gradient sequences during breath-hold, or dynamically during contrast administration
    • A. 

      True

    • B. 

      False

  • 7. 
    The options to increase contrast between vessels and surrounding tissue are done by exploiting __________ enhancement.
    • A. 

      Flow-related

    • B. 

      Vessel

    • C. 

      Tissue

    • D. 

      Contrast

  • 8. 
    If patient has a fast rate, the RR interval is longer than if patient has slow heart rate.
    • A. 

      True

    • B. 

      False

  • 9. 
    COW sequences are usually associated with low velocity blood flow?
    • A. 

      True

    • B. 

      False

  • 10. 
    In black blood imaging, spin echo sequences are improved by SAT pulses, which ________ the signal from in-flowing blood.
    • A. 

      Increases

    • B. 

      Changes

    • C. 

      Reduces

    • D. 

      Doesn't change

  • 11. 
    If heart rate speeds up so that R wave occurs while the system is still acquiring data, the R wave is missed and the effective TR shortens.
    • A. 

      True

    • B. 

      False

  • 12. 
    MOTSA improves coverage and maintains signal from blood flowing within larger volume. MOTSA
    • A. 

      Multiple Oversampling Thin Section Angiography

    • B. 

      Multiple Overlapping Thick Section Angiography

    • C. 

      Multiple Overlapping Thin Section Angiography

    • D. 

      Multiple Overstepping Thin Section Angiography

  • 13. 
    Black Blood Imaging is also as known as?
    • A. 

      Phase contrast signal loss

    • B. 

      Hypo-intense signal loss

    • C. 

      Time of flight signal loss

    • D. 

      Hyper-intense signal loss

  • 14. 
    MRA techniques utilize different phenomena to increase signal from flowing spins.  This are _______________? (select all that apply)
    • A. 

      PC-MRA

    • B. 

      Triple IR

    • C. 

      TOF-MRA

    • D. 

      CE-MRA

    • E. 

      DS-MRA

  • 15. 
    If patient’s heart rate is 120 beats per minute, then the R to R interval is?
    • A. 

      1000ms

    • B. 

      1500ms

    • C. 

      100ms

    • D. 

      500ms

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