Mock 2.4

15 Questions

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Questions and Answers
  • 1. 
    For the area of the pixel __________.
    • A. 

      Multiply one side by the other side

    • B. 

      Divide one side by the other side

    • C. 

      Add one side to the other side

    • D. 

      Subtract one side from the other side

  • 2. 
    For the area of the pixel, the answer will be in units of __________.
    • A. 

      Mm

    • B. 

      Mm2

    • C. 

      Mm3

    • D. 

      Cm

  • 3. 
    For the voxel volume __________.
    • A. 

      Multiply one side by the other side then multiply that answer by the slice thickness

    • B. 

      Divide one side by the other side by the thickness

    • C. 

      Add one side to the other side + thickness

    • D. 

      Subtract one side from the other side - thickness

  • 4. 
    For the voxel volume, the answer will be in units of __________.
    • A. 

      Mm

    • B. 

      Mm2

    • C. 

      Mm3

    • D. 

      Cm

  • 5. 
    For an isotropic voxel: __________.
    • A. 

      One side should equal the other side should be greater than the slice thickness

    • B. 

      One side should be greater than the other side should equal the slice thickness

    • C. 

      One side should equal the other side should equal the slice thickness

    • D. 

      All sides are different

  • 6. 
    The acquisition time is determined by several imaging parameters including: __________.
    • A. 

      TE, TI & flip angle

    • B. 

      TR, TE, FOV

    • C. 

      Slice thickness and gap

    • D. 

      TR, Matrix, NSA and in some cases # slices and ETL

  • 7. 
    For conventional imaging scan time for a 2D acquisition can be calculated as follows:
    • A. 

      TR x Ny x NSA

    • B. 

      TR x Ny x NSA x # slices (partitions)

    • C. 

      TR x Ny x NSA/ ETL

    • D. 

      TR x NSA x #shots

  • 8. 
    For fast spin echo imaging scan time for a 2D acquisition can be calculated as follows:
    • A. 

      TR x Ny x NSA

    • B. 

      TR x Ny x NSA x # slices (partitions)

    • C. 

      TR x Ny x NSA/ ETL

    • D. 

      TR x NSA x #shots

  • 9. 
    For a 3D, or volume acquisition or a single slice acquisition, scan time can be calculated as follows:
    • A. 

      TR x Ny x NSA

    • B. 

      TR x Ny x NSA x # slices (partitions)

    • C. 

      TR x Ny x NSA/ ETL

    • D. 

      TR x NSA x #shots

  • 10. 
    For an EPI acquisition, scan time can be calculated by:
    • A. 

      TR x Ny x NSA

    • B. 

      TR x Ny x NSA x # slices (partitions)

    • C. 

      TR x Ny x NSA x # slices (partitions)

    • D. 

      TR x NSA x #shots

  • 11. 
    The number of frequency encodings __________ affect the scan time
    • A. 

      Does

    • B. 

      Does not

    • C. 

      Doubles

    • D. 

      None of the above

  • 12. 
    TR is the time between successive __________.
    • A. 

      90° RF pulses

    • B. 

      180° pulses

    • C. 

      360° pulses

    • D. 

      None of the above

  • 13. 
    TR is generally chosen by the amout of __________ desired on the image.
    • A. 

      T1 contrast

    • B. 

      T2 contrast

    • C. 

      T1 contrast or T2 contrast

    • D. 

      None of the above

  • 14. 
    As TR is increased, the image reflects __________.
    • A. 

      More T1 contrast

    • B. 

      Less T1 contrast

    • C. 

      More T2 contrast

    • D. 

      Less T2 contrast

  • 15. 
    For T1 information in the brain at 1.5 T, TR times of __________ are usually desired.
    • A. 

      250 msec-400 msec

    • B. 

      400 msec-500 msec

    • C. 

      1000 msec-15000 msec

    • D. 

      2000 msec-4000 msec