MIC Ch1 System Operations & Components

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sully79
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308452
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MIC Ch1 System Operations & Components
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2015-09-24 12:50:19
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MIC CT Registry Review
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CT Registry Review MIC Chapter 1
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  1. 37. Tungsten is used as the target material on the tube's anode because it has a _____ atomic number and a _______ melting point.
    A. low, high
    B. low, low
    C. high, high
    D. high, low
    C. high, high
    (this multiple choice question has been scrambled)
  2. ______ scanner design was the first to acquire four slices in a single rotation.
    A. second-generation
    B. third-generation
    C. multi-row detector
    D. continuous rotation
    C. Multi-row detector
    (this multiple choice question has been scrambled)
  3. 18. The enormous heat that builds up in the tube is caused by the:
    A. collision of the electorn beam with the tungsten target on the tube anode
    B. x-ray filter in the tube which absorbs the lower energy photons before they can enter the patinet
    C. intensity of the x-rays emitted from the tube
    D. electron beam between the cathode and the anode in the tube
    A. Collision of the electron beam with the tungsten target on the tube anode
    (this multiple choice question has been scrambled)
  4. 24. The number of electron that flow from the cathode to the anode in the tube is controlled by the:
    A. anode target
    B. collimation
    C. mA
    D. kV
    C. mA
    (this multiple choice question has been scrambled)
  5. 26. The slip ring on continuous rotation CT scanners:
    1. prevents the high voltage cable from winding up
    2. allows the exam to commence more rapidly
    3. eliminates the need for the reversal of gantry frame rotation
    A. 3 only
    B. 1 only
    C. 2 only
    D. 1, 2 and 3
    D. 1, 2, and 3
    (this multiple choice question has been scrambled)
  6. 4. Which of the following is NOT a part of the CT tube?
    A. collimator
    B. filament
    C. tungsten target
    D. rotating anode
    A. collimator
    (this multiple choice question has been scrambled)
  7. 13. Which of the following are NOT commonly used on today's commercially available CT scanners?
    1. xenon detectors
    2. fourth-generation technology
    3. continuous rotation technology
    A. 2 and 3
    B. 1 only
    C. 1 and 2
    D. 1, 2 and 3
    C. 1 and 2
    (this multiple choice question has been scrambled)
  8. 2. Which system component coverts the projection attenuation data into the proper digital form for the array processor?
    A. host computer
    B. analog-to-digital converter
    C. detector
    D. photodiode
    B. Analog-to-digital converter
    (this multiple choice question has been scrambled)
  9. X-ray photons are produced by a fast-moving electron:
    1. colliding with an atomic nucleus
    2. passing close to an atomic nucleus
    3. colliding with an electron within an atom and ejecting it
    A. 2 only
    B. 1 only
    C. 1, 2 and 3
    D. 3 only
    C. 1, 2, and 3
    (this multiple choice question has been scrambled)
  10. 25. Which of the following is TRUE regarding solid state detectors?
    1. x-ray photons cause the detectors to generate a flash of light
    2. they are the detector type used on most CT scanners today
    3. they can be used in both third-generation and fourth-generation CT systems
    A. 1 only
    B. 3 only
    C. 2 only
    D. 1, 2 and 3
    D. 1, 2, and 3
    (this multiple choice question has been scrambled)
  11. 27. CT is commonly referred to as all of the following names EXCEPT:
    A. Computed tomography
    B. digital subtraction angiography
    C. computerized axial tomography
    D. CAT-scan
    B. digital subtraction angiography
    (this multiple choice question has been scrambled)
  12. 16. What control does the operator have over the x-rays in a CT exam?
    A. the energy level and the quantity of x-rays can be selected
    B. the temperature and color of the x-rays can be tuned
    C. the volume and tone of the x-rays can be dialed
    D. the phase and frequency of the x-ray can be adjusted
    A. the energy level and the quantity of x-rays can be selected
    (this multiple choice question has been scrambled)
  13. 23. Which of the following statements is TRUE?
    1. kV is the voltage potential between the tube cathode and anode while mA ultimately controls the filament current and, thus the temperature of the cathode filament
    2. kV controls the energy level of the x-ray photons and mA controls the number of x-ray photons emitted from the tube
    3. althought the kV and the mA affect the operaton of the CT x-ray tube, the two parameters have no bearing on the image quality
    A. 1 only
    B. 1 and 2
    C. 2 only
    D. 2 and 3
    B. 1 and 2
    (this multiple choice question has been scrambled)
  14. 39. Which of the following does NOT affect the quantity of x-rays that completely penetrates the patient?
    1. the distance that the x-ray photons must travel on their course throught the patient's body
    2. the molecular composition of the tissues through which the x-ray photons pass
    3. the type of detector material used
    A. 1, 2 and 3
    B. 3 only
    C. 1 only
    D. 2 only
    B. 3 only
    (this multiple choice question has been scrambled)
  15. 19. _____ made helical imaging possible.
    A. continuous rotation scanners
    B. the introduction of second-generation technology
    C. the introduction of fourth-generation technology
    D. multi-row detector scanners
    A. Continuous rotation scanners
    (this multiple choice question has been scrambled)
  16. 31. Which of the following statements is FALSE regarding the collection of CT data?
    A. the detectors measure x-rays which completely penetrate the patient
    B. the reconstruction process used to create the image occurs in the array processor
    C. to collect the complete set of CT data, x-rays must be passed through the body at many different angles
    D. long scan times are more desirable because they average out motion artifacts
    D. long scan times are more desirable because they average out motion artifacts
    (this multiple choice question has been scrambled)
  17. 10. Which of the following is a component NOT normally located in the gantry of a modern CT system?
    A. array processor
    B. X-ray tube
    C. pre-patient collimators
    D. solid-state detectors
    A. array processor
    (this multiple choice question has been scrambled)
  18. 6. X-rays are used in CT because:
    A. they penetrate the body according to specific attenuation characteristics of each tissue
    B. the FDA imposes no limit on the dose to the patient
    C. they are less harmful then the heating effects of microwave radiation
    D. they are easily produced by the high frequency generator
    A. They penetrate the body according to specific attenuation characteristics of each tissue
    (this multiple choice question has been scrambled)
  19. 8. X-rays are produced whenever fast-moving electron collide with any form of matter because:
    1. the electron splits into two x-ray photons of equal energy upon impact with the matter
    2. the electron loses kinetic energy which is converted into the emission of an x-ray photon
    3. the electron converts the electron it collides with into an x-ray photon
    A. 2 only
    B. 1, 2 and 3
    C. 1 only
    D. 3 only
    A. 2 only
    (this multiple choice question has been scrambled)
  20. Bremsstrahlung radiation does NOT include which type of electron activity?
    1. collision between an incoming electron and the nucleus of the target atom
    2. collision between an incoming electron and an electron in an inner shell of the target atom
    3. slowing down of an incoming electron due to the effect of passing close to the positive charge of the necleus of the target atom
    A. 3 only
    B. 1 only
    C. 1, 2 and 3
    D. 2 only
    D. 2 only
    (this multiple choice question has been scrambled)
  21. 9. The mA determines the:
    A. slice thickness
    B. coefficient of attenuation
    C. energy level of the x-ray photons
    D. quantity of x-ray photons
    D. quantity of x-ray photons
    (this multiple choice question has been scrambled)
  22. 12. Increased _____ will increase the likelihood that a given x-ray will penetrate a material.
    1. kV
    2. mA
    3. exposure time
    A. 1 only
    B. 1, 2 and 3
    C. 3 only
    D. 2 only
    A. 1 only
    (this multiple choice question has been scrambled)
  23. 36. Collimation:
    A. is accomplished by physically blocking x-rays
    B. limits the low energy x-ray photons and passes the high energy photons
    C. is accomplished by electrically blocking x-rays
    D. affects the scan time
    A. is accomplished by physically blocking x-rays
    (this multiple choice question has been scrambled)
  24. 15. Scatter radiaton is caused by:
    A. deflections from the original trajectory of an x-ray photon through the patient
    B. x-rays generated spontaneously in the ambient atmosphere
    C. miscalibrated detector
    D. improper patient positioning
    A. Deflections from the original trajectory of an x-ray photon through the patient
    (this multiple choice question has been scrambled)
  25. 30. Which technology do multi-row detector scanners employ?
    A. third-generation
    B. first-generation
    C. second-generation
    D. fourth-generation
    A. third-generation
    (this multiple choice question has been scrambled)
  26. 3. Which of the following is NOT a function of a PACS system?
    A. image display for the radiologists
    B. long term data storage
    C. digital distribution of images
    D. reconstruction of the image from the raw data
    D. reconstruction of the image from the raw data
    (this multiple choice question has been scrambled)
  27. 34. Which of the following is TRUE regarding multi-row detector CT scanners?
    1. the size of the detector arrays along the z-direction may be different
    2. the attenuation information from adjacent detector arrays may be added together to generate thicker slices
    3. all of the detector arrays may or may not be used
    A. 1 only
    B. 2 only
    C. 3 only
    D. 1, 2 and 3
    D. 1, 2, and 3
    (this multiple choice question has been scrambled)
  28. 5. Which of the following is FALSE regarding CT systems?
    1. they are limited to non-oblique transverse scanning
    2. they cannot generate a straight coronal or sagittal image
    3. they have no moving parts
    A. 2 only
    B. 1, 2 and 3
    C. 1 only
    D. 3 only
    B. 1, 2, and 3
    (this multiple choice question has been scrambled)
  29. 7. Most of the commands from the technologist are received by the:
    A. operator's console
    B. host computer
    C. array processor
    D. amplifier
    A. operator's console
    (this multiple choice question has been scrambled)
  30. 40. The operator's console may include:
    1. monitor
    2. keyboard
    3. graphic input device
    A. 1 only
    B. 2 only
    C. 3 only
    D. 1, 2 and 3
    D. 1, 2, and 3
    (this multiple choice question has been scrambled)
  31. 28. Which of the following CT scanner designs does NOT use an x-ray tube?
    A. PET/CT
    B. electron beam CT
    C. MDCT
    D. first-generation CT
    B. electron beam CT
    (this multiple choice question has been scrambled)
  32. 11. Tube interscan delay time refers to:
    A. the time required for the tube to make a complete 360* revolution about the gantry
    B. the length of time required for the production of photons to begin after applying the voltage to the tube
    C. a quality assurance test performed daily by the technologist
    D. the time between the end of one scan and the start of the next scan during which the tube will cool
    D. the time between the end of one scan and the start of the next scan during which the tube will cool
    (this multiple choice question has been scrambled)
  33. 32. On a single-row detector scanner, collimation:
    1. controls the slice thickness
    2. minimizes the x-ray dose to the patient
    3. reduces the detection of scatter radiation
    A. 2 only
    B. 1, 2 and 3
    C. 1 only
    D. 3 only
    B. 1, 2, and 3
    (this multiple choice question has been scrambled)
  34. 21. The main purpose of the detector is to:
    A. amplify the measured signal
    B. limit the x-ray dose to the patient
    C. provide additional collimation in order to reduce scatter
    D. capture x-ray photons and convert them to a measurable signal
    D. capture x-ray photons and convert them to a measurable signal
    (this multiple choice question has been scrambled)
  35. 1. In order for an x-ray photon to be measured it must:
    1. enter the detector chamber
    2. be absorbed by the detector material
    3. be converted to a measurable event
    A. 3 only
    B. 1 only
    C. 2 only
    D. 1, 2 and 3
    D. 1, 2, and 3
    (this multiple choice question has been scrambled)
  36. 20. The patient table:
    A. may move continuously during the scan
    B. can never be positioned automatically by software due to safety precations
    C. only moves after each slice is completed
    D. remains stationary throughout the patient exam once it is initially positioned
    A. may move continuously during the scan
    (this multiple choice question has been scrambled)
  37. 14. Which of the following statements is FALSE regarding occurrences after an x-ray photon penetrates the detector aperture?
    1. the photon can pass through the detector unmeasured
    2. the photon is converted completely into an electron
    3. the measured signal is enhanced by an amplifier
    A. 3 only
    B. 2 only
    C. 1, 2 and 3
    D. 1 only
    B. 2 only
    (this multiple choice question has been scrambled)
  38. 38. CT images can be directly scanned in planes other then transverse by:
    1. orienting the patient's body part so that is is not perpendicular to the x-ray beam
    2. tilting the gantry
    3. changing the angle that the x-ray beam leaves the tube
    A. 2 and 3
    B. 1, 2 and 3
    C. 1 and 2
    D. 1 only
    C. 1 and 2
    (this multiple choice question has been scrambled)
  39. 35. The CT x-ray tube rotates around the patient to:
    1. keep the tube cool
    2. generate projection views at different angles
    3. minimize the x-ray dose administered to the patient
    A. 3 only
    B. 1 only
    C. 1, 2 and 3
    D. 2 only
    D. 2 only
    (this multiple choice question has been scrambled)
  40. 22. The cathode filament:
    A. helps determine the size of the focal spot
    B. releases the x-ray photons
    C. lights up the tube so it can be serviced by an engineer
    D. focuses x-rays onto the anode target
    A. Helps determine the size of the focal spot
    (this multiple choice question has been scrambled)
  41. CT consists of an Anode and a Cathode just like in X-ray, which is Positive and which is Negative?
    • Anode = Positive
    • Cathode = Negative
  42. Which generation scanner did NOT use a fan beam?
    1. First
    2. Second
    3. Third
    4. Fourth
    a. 1 only
    b. 2 only
    c. 3 only
    d. 4 only
    e. 1, 2, 3, and 4
    • a. 1 only
    • First Generation used a Pencil Beam
  43. Multi-Row Detector Scanners collect information from multiple anatomical slices in each rotation of the x-ray tube.
    True or False
    True
  44. Which of the Following is Characteristic Radiation?
    1. collision between an incoming electron and the nucleus of the target atom
    2. slowing down of an incoming electron due to the effect of passing close to the positive charge of the nucleus or the target atom
    3. collision between an incoming electron and an electron in an inner shell of the target atom
    a. 1 only
    b. 2 only
    c. 3 only
    d. 1, 2, and 3
    • c. 3 only
    • 1 and 2 are Bremsstrahlung Radiation
  45. X-rays are produced when fast moving electrons collide with the target material and _____ energy.
    A. distribute
    B. lose
    C. gain
    D. maintain
    B. lose
    (this multiple choice question has been scrambled)
  46. CT Tube voltages are selected in the range of ___ to ___ kilovolts or kV.
    A. 50 to 100
    B. 90 to 140
    C. 110 to 160
    D. 70 to 120
    B. 90 to 140
    (this multiple choice question has been scrambled)
  47. What is the target material made of on the Anode?
    A. Tungsten
    B. Aluminum
    C. Titanium
    D. Copper
    A. Tungsten
    (this multiple choice question has been scrambled)
  48. Small focal spots make:
    1. thin slices possible
    2. high resolution possible
    3. low resolution possible
    A. 1 and 2 only
    B. 1 only
    C. 1 and 3 only
    D. 3 only
    A. 1 and 2 only
    (this multiple choice question has been scrambled)
  49. On a single row detector scanner, what technical factor determines the slice thickness?
    A. focal spot
    B. pre-patient collimation
    C. post-patient collimation
    D. kVp
    B. pre-patient collimation
    (this multiple choice question has been scrambled)
  50. For MDCT, the collimator selects the thickness of the x-ray beam which spreads out over the multiple rows of detectors. What determines the final slice thickness?
    a. pre-patient collimation
    b. post-patient collimation
    c. image reconstruction
    d. focal spot
    • c. image reconstruction
    • -thickness of the x-ray beam divided by the total number of slices acquired in a single rotation
  51. Since one of the purposes of the pre-patient collimator is to help determine slice thickness; on MDCT scanners thats not the case, what is the purpose of pre-patient collimation for MDCT?
    To Reduce Patient Radiation Dose
  52. 17. Which of the following is the standard that's used to achieve compatibility for image transfer between various imaging modalities, viewing stations, and printers in a hospital?
    A. PACS
    B. T1
    C. DICOM
    D. TCP/IP
    C. DICOM
    (this multiple choice question has been scrambled)
  53. 29. ______ allow(s) remote authorized individuals to connect to a server in a secure fashion using the routing infrastructure provided on a public network, such as the internet.
    A. T1 lines
    B. Increased bandwidth
    C. VPNs
    D. DICOM
    C. VPNs
    (this multiple choice question has been scrambled)
  54. 33. In a radiology department, a _____ is an example of a "client" on the network.
    1. CT scanner
    2. Viewing console in the physicians reading room
    3. Printer for diagnostic images
    A. 2 & 3
    B. 2 only
    C. 1 only
    D. 1, 2, and 3
    D. 1, 2, and 3
    (this multiple choice question has been scrambled)

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