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RDT 115 - FINALS

RDT 115 - FINALS
31問 • 1年前
  • ischial tiberosity
    • 通報

    問題一覧

  • 1

    Which type of CT artifact occurs due to beam hardening?

    Beam Hardening

  • 2

    What does the beam-hardening look like

    Streak & Dark Bands

  • 3

    Aliasing artifact occurs due to which factor

    Low Sampling Rates

  • 4

    What is the cause of photon starvation artifact?

    Insuffiecient Xray photons reaching the detecter

  • 5

    Which technique can help reduce beam-hardening artifacts

    All of the Above

  • 6

    What artifact is caused by patient motion?

    Blurring/Ghosting

  • 7

    What artifact appears as starburst patterns

    Metallic Materials

  • 8

    Incomplete projections during a ctscan leads to which artifact?

    Streaking

  • 9

    How can motion artifact be minimize

    Patient Immobilization

  • 10

    What patient factor can lead to star effect

    Metallic Implants

  • 11

    What is the result of detector malfunction in ct scan

    Ring Artifact

  • 12

    What reconstruction method is prone to streak artifact?

    Filtered back projection

  • 13

    Which interpolation method is most commonly used in helical ct?

    180 linear interpolation

  • 14

    How can ring artifact be reduced

    Calibration of Detector

  • 15

    What causes partial volume artifact in ct imaging?

    Multiple tissues between single voxel

  • 16

    Which method can reduced partial volume artifacts?

    Use thinner slices

  • 17

    Partial Volume artifact is more likely occur in which imaging scenario

    Thick slices with low contrast resolution

  • 18

    What is the usual characteristics of aliasing artifact?

    Fines, Stripes or Bands

  • 19

    Aliasing in ct is caused by which factor?

    Insufficient Sampling Frequency

  • 20

    What adjustments can help to reduce aliasing artifact?

    Increase sampling frequency

  • 21

    Which artifact results from overlapping during helical scanning?

    Interpolation Artifact

  • 22

    Beam-hardening is most noticeable in which type of tissue?

    High Density Tissues

  • 23

    Which scanning adjustments reduces beam-hardening artifacts?

    Use of bow tie filters

  • 24

    Beam-hardening correction algorithm are applied during which phase?

    Image Reconstruction

  • 25

    Metalic artifact appear as of which of the following?

    Starburst

  • 26

    What technique can reduce metalic artifacts?

    Metal artifact reduction software

  • 27

    Which imaging modality is LEAST affected by metalic implants

    Xray

  • 28

    What causes noise artifact in ct imaging?

    Low photon counts

  • 29

    How can noise artifact be minimized?

    Increase tube current

  • 30

    Noise artifact are visually observed as

    Grayniness

  • 31

    Interrutive??? Reconstruction reduces which artifact type most effectively?

    Noise Artifact

    • RDT 116 - MIDTERMS

    RDT 116 - MIDTERMS

    ischial tiberosity · 40問 · 1年前

    RDT 116 - MIDTERMS

    RDT 116 - MIDTERMS

    40問 • 1年前
    ischial tiberosity

    RDT 115 - MIDTERMS

    RDT 115 - MIDTERMS

    ischial tiberosity · 52問 · 1年前

    RDT 115 - MIDTERMS

    RDT 115 - MIDTERMS

    52問 • 1年前
    ischial tiberosity

    RDT 116 - FINALS

    RDT 116 - FINALS

    ischial tiberosity · 30問 · 1年前

    RDT 116 - FINALS

    RDT 116 - FINALS

    30問 • 1年前
    ischial tiberosity

    問題一覧

  • 1

    Which type of CT artifact occurs due to beam hardening?

    Beam Hardening

  • 2

    What does the beam-hardening look like

    Streak & Dark Bands

  • 3

    Aliasing artifact occurs due to which factor

    Low Sampling Rates

  • 4

    What is the cause of photon starvation artifact?

    Insuffiecient Xray photons reaching the detecter

  • 5

    Which technique can help reduce beam-hardening artifacts

    All of the Above

  • 6

    What artifact is caused by patient motion?

    Blurring/Ghosting

  • 7

    What artifact appears as starburst patterns

    Metallic Materials

  • 8

    Incomplete projections during a ctscan leads to which artifact?

    Streaking

  • 9

    How can motion artifact be minimize

    Patient Immobilization

  • 10

    What patient factor can lead to star effect

    Metallic Implants

  • 11

    What is the result of detector malfunction in ct scan

    Ring Artifact

  • 12

    What reconstruction method is prone to streak artifact?

    Filtered back projection

  • 13

    Which interpolation method is most commonly used in helical ct?

    180 linear interpolation

  • 14

    How can ring artifact be reduced

    Calibration of Detector

  • 15

    What causes partial volume artifact in ct imaging?

    Multiple tissues between single voxel

  • 16

    Which method can reduced partial volume artifacts?

    Use thinner slices

  • 17

    Partial Volume artifact is more likely occur in which imaging scenario

    Thick slices with low contrast resolution

  • 18

    What is the usual characteristics of aliasing artifact?

    Fines, Stripes or Bands

  • 19

    Aliasing in ct is caused by which factor?

    Insufficient Sampling Frequency

  • 20

    What adjustments can help to reduce aliasing artifact?

    Increase sampling frequency

  • 21

    Which artifact results from overlapping during helical scanning?

    Interpolation Artifact

  • 22

    Beam-hardening is most noticeable in which type of tissue?

    High Density Tissues

  • 23

    Which scanning adjustments reduces beam-hardening artifacts?

    Use of bow tie filters

  • 24

    Beam-hardening correction algorithm are applied during which phase?

    Image Reconstruction

  • 25

    Metalic artifact appear as of which of the following?

    Starburst

  • 26

    What technique can reduce metalic artifacts?

    Metal artifact reduction software

  • 27

    Which imaging modality is LEAST affected by metalic implants

    Xray

  • 28

    What causes noise artifact in ct imaging?

    Low photon counts

  • 29

    How can noise artifact be minimized?

    Increase tube current

  • 30

    Noise artifact are visually observed as

    Grayniness

  • 31

    Interrutive??? Reconstruction reduces which artifact type most effectively?

    Noise Artifact