Amrit Review 1.5

20 Questions

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Electronics Quizzes & Trivia

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Questions and Answers
  • 1. 
    A technique to avoid "crosstalk" between slices with little or no slice interval is:
    • A. 

      Inversion recovery

    • B. 

      Pre-saturation

    • C. 

      Flow enhancement

    • D. 

      Interleaving

  • 2. 
    Logically, each line of phase encoding data is combined to allow the FT to determine position along the Y-axis. The # of phase encoding steps determines:
    • A. 

      The # of voxels along the Y-axis

    • B. 

      The # of pixels along the X-axis

    • C. 

      The # of voxels along the X-axis

    • D. 

      The # of pixels along the Y-axis

  • 3. 
    In spatial localization, which factor most affects slice thickness and position?
    • A. 

      Bandwidth and strength of the Gs

    • B. 

      Direction of Gs

    • C. 

      Amplitude of the initial RF pulse

    • D. 

      Direction of Gp.

  • 4. 
    For the following spin-echo protocol: FOV: 320/ TR:500/ TE:25/ SliceThick.:5mm/ Slice Gap:1mm/ Slice.#:9/ NEX:4, Matrix:192 Decreasing NEX will:
    • A. 

      Increase SNR and Resolution

    • B. 

      Decrease SNR and Resolution.

    • C. 

      Increase scan time

    • D. 

      Have no effect on scan time

  • 5. 
    For the following spin-echo protocol: FOV: 320/ TR:500/ TE:25/ SliceThick.:5mm/ Slice Gap:1mm/ Slice.#:9/ NEX:4, Matrix:192 Decreasing Matrix will:
    • A. 

      Increase pixel size.

    • B. 

      Decrease pixel size

    • C. 

      Have no effect on pixel size

  • 6. 
    A gradient is employed exposing the patient's body to a series of increasing or decreasing magnetic field strengths for slice selection. In what relation to the slice is this gradient?
    • A. 

      Anti-parallel.

    • B. 

      Perpendicular

    • C. 

      Parallel

    • D. 

      Oblique

  • 7. 
    For the following spin-echo protocol: FOV: 320/ TR:500/ TE:25/ SliceThick.:5mm/ Slice Gap:1mm/ Slice.#:9/ NEX:4, Matrix:192 Increasing TE will:
    • A. 

      Decrease SNR and decrease Slice

    • B. 

      Increase SNR and increase Slice#.

    • C. 

      Increase scan time.

    • D. 

      Decrease scan time

  • 8. 
    Spatial Resolution is an image quality factor determined by _________ and __________.
    • A. 

      Field strength/receiver coil

    • B. 

      Flip angle/TE

    • C. 

      TR/NEX

    • D. 

      Slice thickness/pixel size

  • 9. 
    An Inversion Recovery pulse sequence can be which of the following:
    • A. 

      T1 weighted

    • B. 

      Water suppressed

    • C. 

      Fat suppressed

    • D. 

      All

  • 10. 
    In spatial localization, which gradient is considered to be the "logical" "read-out" gradient?
    • A. 

      Gz

    • B. 

      Gy

    • C. 

      Gx

  • 11. 
     Top of Form Combining a metal ion with a ligand reduces their tendency to bind to proteins, enzymes or membranes. The degree to which they dissociate is a measure of their:
    • A. 

      Chelating ability

    • B. 

      Osmolarity

    • C. 

      Toxicity

    • D. 

      Osmolality

  • 12. 
    An Inversion Recovery pulse sequence can be which of the following:
    • A. 

      T1 weighted

    • B. 

      Water suppressed

    • C. 

      Fat suppressed

    • D. 

      All

  • 13. 
    In spatial localization, the "logical" phase encoding gradient is symbolized?
    • A. 

      Gz

    • B. 

      Gy

    • C. 

      Gx

  • 14. 
    Using the following protocol, determine the scan time for this pulse sequence: (round off your answer to the nearest minute.) FOV: 260mm, TR 550ms, TE 25, NEX 4, Matrix: 256 x 192
    • A. 

      5 mins.

    • B. 

      7 mins.

    • C. 

      9 mins.

    • D. 

      13 mins.

  • 15. 
    Spatial Resolution is an image quality factor determined by _________ and __________.
    • A. 

      Field strength/receiver coil

    • B. 

      Flip angle/TE

    • C. 

      TR/NEX

    • D. 

      Slice thickness/pixel size

  • 16. 
    In an Inversion Recovery pulse sequence, what TI will produce a STIR fat suppressed pulse sequence?
    • A. 

      80 - 120

    • B. 

      180 - 300

    • C. 

      300 - 500

    • D. 

      500 - 800

  • 17. 
    A linear relationship between frequency and position is superimposed on Bo by the Gp. The H protons' relative precessional frequencies determine:
    • A. 

      Phase coherence

    • B. 

      Phase encoding

    • C. 

      Phase shifts.

    • D. 

      Rephasing

  • 18. 
    Logically, each line of phase encoding data is combined to allow the FT to determine position along the Y-axis. The # of phase encoding steps determines:
    • A. 

      The # of voxels along the Y-axis

    • B. 

      The # of pixels along the X-axis.

    • C. 

      The # of voxels along the X-axis

    • D. 

      The # of pixels along the Y-axis.

  • 19. 
    For the following spin-echo protocol: FOV: 320/ TR:500/ TE:25/ SliceThick.:5mm/ Slice Gap:1mm/ Slice.#:9/ NEX:4, Matrix:192 Decreasing Slice thickness will:
    • A. 

      Increase SNR

    • B. 

      Decrease SNR.

    • C. 

      Increase Matrix

  • 20. 
    Using the following protocol, determine the scan time for this pulse sequence: (round off your answer to the nearest minute.) FOV: 320mm, TR: 2000ms, TE 20/80ms, NEX: 1, Matrix: 256x128
    • A. 

      3 mins.

    • B. 

      4 mins

    • C. 

      6 mins.

    • D. 

      12 mins