Limitations of Film-Based Radiography
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Questions and Answers

What is the major shortcoming of radiography mentioned in the text?

  • Difficulty distinguishing structures of similar density (correct)
  • Inability to capture images of tumors
  • Quantitative rather than qualitative nature
  • Lack of clarity in differentiating bone from soft tissue

    • How does conventional tomography attempt to address the problem of superimposition in radiography?

  • By blurring unwanted sections while keeping the desired layer in focus (correct)
  • By moving the X-ray tube and film in the same direction
  • By using a higher radiation dosage
  • By keeping all structures above and below the focused section

    • What distinguishes conventional tomography from CT imaging?

  • Motion of the X-ray tube and film (correct)
  • Image quality
  • Use of different types of radiation
  • Cost

    • Why is distinguishing between homogeneous and heterogeneous objects a challenge in radiography?

    <p>Because it is tough to differentiate objects with varying thicknesses</p> Signup and view all the answers

    What is the primary goal of tomography?

    <p>To remove structures above and below the focused section</p> Signup and view all the answers

    What is a significant limitation of radiography and tomography, as mentioned in the text?

    <p>Ability to adequately demonstrate slight differences in subject contrast</p> Signup and view all the answers

    How does CT imaging differ from conventional radiography, based on the information provided?

    <p>CT eliminates superimposition of structures found in plane film imaging</p> Signup and view all the answers

    What is a key advantage of digital imaging modalities, like CT, over traditional radiographic film-screen combinations?

    <p>Digital imaging can alter contrast after image capture</p> Signup and view all the answers

    How is a CT scan beneficial for treatment planning purposes, as detailed in the text?

    <p>Guidance for biopsies and radiation therapy</p> Signup and view all the answers

    What is the technique used to generate a three-dimensional image for CT scans?

    <p>Digital geometry processing of two-dimensional X-ray images</p> Signup and view all the answers

    What is a drawback associated with conventional CT scanners, as described in the text?

    <p>Long procedure time due to the patient being scanned slice-by-slice</p> Signup and view all the answers

    Why does the text mention that only 1-2 seconds are spent on data acquisition during scanning with conventional CT scanners?

    <p>To explain the poor temporal resolution and long procedure time</p> Signup and view all the answers

    What role do cables play in the functioning of conventional CT scanners, based on the information provided?

    <p>They are involved in spooling and releasing during rotation</p> Signup and view all the answers

    What is the main reason for the poor temporal resolution in conventional CT scanners, as mentioned in the text?

    <p>The slow spooling and respooling of cables</p> Signup and view all the answers

    How does the patient's position typically change during a scan with conventional CT scanners?

    <p>The patient's position remains stationary throughout the scan</p> Signup and view all the answers

    What is the primary reason for the time-consuming nature of conventional CT scanning?

    <p>The spooling and respooling of cables during scanning</p> Signup and view all the answers

    What contributes to the poor temporal resolution in conventional CT scanners according to the text?

    <p>Rotating X-ray tube and detectors</p> Signup and view all the answers

    Why does the text highlight the time spent on data acquisition during conventional CT scanning?

    <p>To illustrate the inefficiency of the scanning process</p> Signup and view all the answers

    Which component plays a significant role in the rotation of conventional CT scanners, affecting the overall procedure time?

    <p>Cables</p> Signup and view all the answers

    How do the cables on a drum contribute to the overall efficiency of conventional CT scanning?

    <p>By reducing the time needed for data acquisition</p> Signup and view all the answers

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