Basic Principles of CT Scanners: Generations of CT
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Questions and Answers

What distinguishes fifth-generation CT scanners from fourth-generation scanners?

  • The electron beam hits a fixed anode.
  • The detector array rotates around the patient.
  • The x-ray source becomes an integral part of the system design. (correct)
  • The x-ray source rotates around the patient.

    • Which generation of CT scanners uses a rotating x-ray source inside a fixed detector array?

  • Second generation
  • Third generation
  • Fifth generation
  • Fourth generation (correct)

    • In fifth-generation CT scanners, what material is the anode made of?

  • Copper
  • Aluminum
  • Steel
  • Tungsten (correct)

    • How do fourth-generation CT systems differ from third-generation systems?

    <p>Fourth-generation systems have a rotating x-ray source inside a fixed detector array.</p> Signup and view all the answers

    Which type of CT scanner produces collimated fan beam x-rays with no moving parts?

    <p>Fifth generation</p> Signup and view all the answers

    What was the significant advancement in the first-generation CT scanners?

    <p>The use of a single highly collimated X-ray pencil beam and detector</p> Signup and view all the answers

    Which of the following statements accurately describes the evolution of CT scanners?

    <p>The X-ray beam shape evolved from pencil beam to narrow beam to fan beam</p> Signup and view all the answers

    Who was the pioneer behind the development of the first CT scanner?

    <p>Godfrey Hounsfield</p> Signup and view all the answers

    What was the initial application of the first CT scanner developed by Godfrey Hounsfield?

    <p>Brain study</p> Signup and view all the answers

    Which of the following statements accurately describes the detector arrangement in first-generation CT scanners?

    <p>A single detector moving in parallel with the X-ray beam</p> Signup and view all the answers

    What was the primary advantage of the advancements in CT scanner technology over time?

    <p>Decreased scan time</p> Signup and view all the answers

    What was the primary limitation of first-generation CT scanners?

    <p>They could only perform head scans</p> Signup and view all the answers

    What was the key difference between first and second-generation CT scanners?

    <p>Second-generation scanners used a fan beam instead of a pencil beam</p> Signup and view all the answers

    What was the primary advantage of using a fan beam in second-generation CT scanners?

    <p>Reduced scan time</p> Signup and view all the answers

    In first-generation CT scanners, how was the translation and rotation motion achieved?

    <p>Both the source and the detector translated and rotated around the patient</p> Signup and view all the answers

    What was the purpose of the highly collimated beam in first-generation CT scanners?

    <p>To reject scattered radiation from the patient</p> Signup and view all the answers

    What was the approximate scan time for a single slice in second-generation CT scanners?

    <p>20 seconds</p> Signup and view all the answers

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