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RDT 115 - MIDTERMS

CT SCAN

RDT 115 - MIDTERMS
52問 • 1年前CT SCAN
  • ischial tiberosity
    • 通報

    問題一覧

  • 1

    what is the effect of dual energy CT scanning.

    increased contrast resolution by using portable energy levels

  • 2

    Which generation of CT scanner first produced the rotating X-ray tube and stationary detector array?

    fourth

  • 3

    Which imaging technique uses contrast media to visualize blood vessels in CT?

    CT Angiography

  • 4

    how does temporal resolution impact cardiac safety imaging?

    minimizes artifact caused by motion

  • 5

    what is the role of multifilter in CT scan?

    equalizes dose distribution across the scan field

  • 6

    which plane divides the body into front and back sections?

    coronal

  • 7

    What is the purpose of tube current collimation in CT

    reduce patient dose based on body size

  • 8

    What happens if the pitch is set too high in Helical ct?

    reduced scan time with decreased image quality

  • 9

    Which reconstruction technique is used to create a volume-rendered 3D image?

    VRT

  • 10

    How does reducing scan time affect patient motion artifacts?

    decrease

  • 11

    Which CT artifact occurs due to under-sampling during rapid rotation?

    aliasing

  • 12

    Which parameter is adjusted to reduce noise while maintaining image quality?

    hinger SNR

  • 13

    What is the significance of calcium storing protocol in CT?

    measures coronary artery calcifications

  • 14

    What matrix size is most likely used for high- resolution CT images?

    512 x 512

  • 15

    Which is the meaning of HU in Ct imaging?

    Hounsfiled Units

  • 16

    Which artifact occurs when the slice thickness is too large for the structured being image

    partial volume artifact

  • 17

    What is the most common contrast agent in ct examination?

    iodinated contrast

  • 18

    Which part of the ct scanner convert xrays to electrical signals

    detector array

  • 19

    Which parameter controls the amount of scattered reaching the detectors

    collimator width

  • 20

    What is primary advantage of code beam ct scanner

    Larger FOV for 3d imaging

  • 21

    How does the collimation impact the z axis resolution in ct

    Narrower collimation enhances z axis resolution

  • 22

    Which artifacts prevents in alternating brighter and dark dense

    zebra artifact

  • 23

    What is the term of the overlap image data in helical scanning?

    reconstructional interval

  • 24

    Which artifacts results from insufficient x ray photon energy in highly attenuating tissues?

    photon starvation artifact

  • 25

    What technique is used to minimize artifact cause by respiratory motion

    respiratory bleeding

  • 26

    Which reconstruction of algorithms is correct for photon attenuation in ct imaging?

    Interrogative reconstruction

  • 27

    Which ct protocol is most appropriate for detecting pulmonary embolism

    CT Angiography

  • 28

    Which factor most influences linearity of ct numbers

    detector calibration

  • 29

    Which reconstruction technique is used to create volume-rendered 3D image

    VRT

  • 30

    Which scan mode allows for continuous data acquisition

    spiral mode

  • 31

    What is the term thin layer of lead inside the ct scanner to shield x rays

    lead housing

  • 32

    How does a scout image assist in ct imaging

    Defines scattering and positioning

  • 33

    What is the role of kvp in ct imaging

    controls the x-ray beam

  • 34

    Which CT artifact occurs due to under-sampling during rapid rotation?

    aliasing

  • 35

    Which plane is reconstructed in coronal reformats

    inferior superior

  • 36

    What is the main function of gray edge filtering in dual energy ct

    Differentiating between tissues with similar densities

  • 37

    Which parameters is commonly adjusted to reduce noise while rotating image quality

    higher SNR

  • 38

    Which technique minimizes metal artifacts in ct

    using algorithm reconstruction

  • 39

    What is the effect of using a wide window width in imaging soft tissues

    Reduces visibility saddle soft tissue differences

  • 40

    What is the main goal of the artifact direction algorithm in ct?

    reduce noise without increasing dose

  • 41

    Most effective way to reduce motion in pediatric ct

    interpolative reconstruction

  • 42

    What happens to your contrast resolution when the window width is set to wide?

    decrease

  • 43

    What causes beam hardening artifacts?

    low energy X-rays are absorbed first

  • 44

    What is the impact of reducing patient dose on image sharpness?

    decrease

  • 45

    What is the role of the bow tie filter in city stand?

    equalizes dose distribution

  • 46

    which city protocol is most appropriate for detecting pulmonary and Bolisa?

    CT and Geography

  • 47

    How does increasing your field of view affect contrast resolution?

    decrease

  • 48

    what happens to your beam hardening artifacts when KVP is increase?

    decrease

  • 49

    What happens to your spatial resolution when the detector aperture is decreased?

    increase

  • 50

    Which parameter is adjusted to reduce noise while obtaining image quality?

    higher SNR

  • 51

    What will happen to your DFOV if it is smaller than your SFOV?

    image magnification

  • 52

    Artifact that comes from large slice thickness

    partial volume 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 - FINALS

    RDT 115 - FINALS

    ischial tiberosity · 31問 · 1年前

    RDT 115 - FINALS

    RDT 115 - FINALS

    31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

    what is the effect of dual energy CT scanning.

    increased contrast resolution by using portable energy levels

  • 2

    Which generation of CT scanner first produced the rotating X-ray tube and stationary detector array?

    fourth

  • 3

    Which imaging technique uses contrast media to visualize blood vessels in CT?

    CT Angiography

  • 4

    how does temporal resolution impact cardiac safety imaging?

    minimizes artifact caused by motion

  • 5

    what is the role of multifilter in CT scan?

    equalizes dose distribution across the scan field

  • 6

    which plane divides the body into front and back sections?

    coronal

  • 7

    What is the purpose of tube current collimation in CT

    reduce patient dose based on body size

  • 8

    What happens if the pitch is set too high in Helical ct?

    reduced scan time with decreased image quality

  • 9

    Which reconstruction technique is used to create a volume-rendered 3D image?

    VRT

  • 10

    How does reducing scan time affect patient motion artifacts?

    decrease

  • 11

    Which CT artifact occurs due to under-sampling during rapid rotation?

    aliasing

  • 12

    Which parameter is adjusted to reduce noise while maintaining image quality?

    hinger SNR

  • 13

    What is the significance of calcium storing protocol in CT?

    measures coronary artery calcifications

  • 14

    What matrix size is most likely used for high- resolution CT images?

    512 x 512

  • 15

    Which is the meaning of HU in Ct imaging?

    Hounsfiled Units

  • 16

    Which artifact occurs when the slice thickness is too large for the structured being image

    partial volume artifact

  • 17

    What is the most common contrast agent in ct examination?

    iodinated contrast

  • 18

    Which part of the ct scanner convert xrays to electrical signals

    detector array

  • 19

    Which parameter controls the amount of scattered reaching the detectors

    collimator width

  • 20

    What is primary advantage of code beam ct scanner

    Larger FOV for 3d imaging

  • 21

    How does the collimation impact the z axis resolution in ct

    Narrower collimation enhances z axis resolution

  • 22

    Which artifacts prevents in alternating brighter and dark dense

    zebra artifact

  • 23

    What is the term of the overlap image data in helical scanning?

    reconstructional interval

  • 24

    Which artifacts results from insufficient x ray photon energy in highly attenuating tissues?

    photon starvation artifact

  • 25

    What technique is used to minimize artifact cause by respiratory motion

    respiratory bleeding

  • 26

    Which reconstruction of algorithms is correct for photon attenuation in ct imaging?

    Interrogative reconstruction

  • 27

    Which ct protocol is most appropriate for detecting pulmonary embolism

    CT Angiography

  • 28

    Which factor most influences linearity of ct numbers

    detector calibration

  • 29

    Which reconstruction technique is used to create volume-rendered 3D image

    VRT

  • 30

    Which scan mode allows for continuous data acquisition

    spiral mode

  • 31

    What is the term thin layer of lead inside the ct scanner to shield x rays

    lead housing

  • 32

    How does a scout image assist in ct imaging

    Defines scattering and positioning

  • 33

    What is the role of kvp in ct imaging

    controls the x-ray beam

  • 34

    Which CT artifact occurs due to under-sampling during rapid rotation?

    aliasing

  • 35

    Which plane is reconstructed in coronal reformats

    inferior superior

  • 36

    What is the main function of gray edge filtering in dual energy ct

    Differentiating between tissues with similar densities

  • 37

    Which parameters is commonly adjusted to reduce noise while rotating image quality

    higher SNR

  • 38

    Which technique minimizes metal artifacts in ct

    using algorithm reconstruction

  • 39

    What is the effect of using a wide window width in imaging soft tissues

    Reduces visibility saddle soft tissue differences

  • 40

    What is the main goal of the artifact direction algorithm in ct?

    reduce noise without increasing dose

  • 41

    Most effective way to reduce motion in pediatric ct

    interpolative reconstruction

  • 42

    What happens to your contrast resolution when the window width is set to wide?

    decrease

  • 43

    What causes beam hardening artifacts?

    low energy X-rays are absorbed first

  • 44

    What is the impact of reducing patient dose on image sharpness?

    decrease

  • 45

    What is the role of the bow tie filter in city stand?

    equalizes dose distribution

  • 46

    which city protocol is most appropriate for detecting pulmonary and Bolisa?

    CT and Geography

  • 47

    How does increasing your field of view affect contrast resolution?

    decrease

  • 48

    what happens to your beam hardening artifacts when KVP is increase?

    decrease

  • 49

    What happens to your spatial resolution when the detector aperture is decreased?

    increase

  • 50

    Which parameter is adjusted to reduce noise while obtaining image quality?

    higher SNR

  • 51

    What will happen to your DFOV if it is smaller than your SFOV?

    image magnification

  • 52

    Artifact that comes from large slice thickness

    partial volume artifact