Computed Tomography Course Quiz
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Questions and Answers

What is the primary focus of the department mentioned?

  • Health Policy and Management
  • Pharmaceutical Sciences
  • Medical Imaging Techniques (correct)
  • Bioengineering

    • Which technology is specifically mentioned in the content?

  • Magnetic Resonance Imaging
  • Computed Tomography (correct)
  • Ultrasound Technology
  • X-ray Imaging

    • In which branch does the study of Computed Tomography techniques fall?

  • Medical and Health Technologies (correct)
  • Clinical Psychology
  • Health Sciences
  • Biomedical Engineering

    • What aspect of Computed Tomography is likely included in the curriculum based on the content provided?

    <p>Introduction and History of Computed Tomography</p> Signup and view all the answers

    Who is likely to be the instructor for the course on Computed Tomography?

    <p>A medical doctor with expertise in imaging</p> Signup and view all the answers

    Which imaging techniques are noted for their inability to show slight differences in subject contrast?

    <p>Radiography and tomography</p> Signup and view all the answers

    What skill is often challenging for both radiography and tomography?

    <p>Imaging soft tissue differences</p> Signup and view all the answers

    In what area do radiography and tomography particularly lack effectiveness?

    <p>Demonstrating soft tissue contrast</p> Signup and view all the answers

    Why are both radiography and tomography limited in specific imaging tasks?

    <p>They cannot visualize soft tissue details.</p> Signup and view all the answers

    What is another name for computerized tomography?

    <p>Computerized Axial Tomography</p> Signup and view all the answers

    What characteristic difference is difficult for radiography and tomography to display?

    <p>Slight differences in subject contrast</p> Signup and view all the answers

    What is the origin of the term 'tomography'?

    <p>Greek for slice and write</p> Signup and view all the answers

    Which of the following statements about computerized tomography is correct?

    <p>It captures detailed images by taking cross-sectional slices.</p> Signup and view all the answers

    Which two Greek words are combined to form the term 'tomography'?

    <p>Tomos and Graphein</p> Signup and view all the answers

    What aspect does the term 'tomos' refer to in the context of tomography?

    <p>A cut or slice</p> Signup and view all the answers

    What is a primary limitation of radiography and tomography regarding tissue contrast?

    <p>Film cannot image very small differences in tissue contrast.</p> Signup and view all the answers

    Why is it challenging to enhance image quality in radiography after filming?

    <p>Contrast cannot be adjusted once recorded in the film.</p> Signup and view all the answers

    Which of the following does NOT represent a challenge of using film in imaging?

    <p>Immediate diagnostics can be performed on the film.</p> Signup and view all the answers

    What aspect of film imaging does NOT allow for adjustments post-recording?

    <p>Tissue contrast adjustments.</p> Signup and view all the answers

    In terms of technology, what is a significant drawback of traditional film-based imaging methods?

    <p>Inability to show subtle tissue contrast differences.</p> Signup and view all the answers

    What is the diameter range of the circular opening for the patient couch?

    <p>24-28 inches</p> Signup and view all the answers

    In what position does the patient lie on the couch for imaging?

    <p>Flat on the table</p> Signup and view all the answers

    Which of the following adjustments can be made to the patient couch?

    <p>Upwards, downwards, frontwards, or backwards</p> Signup and view all the answers

    What is the purpose of the adjustments made to the patient couch?

    <p>To ensure proper positioning for imaging</p> Signup and view all the answers

    What is the primary function of the flat 'patient couch'?

    <p>To facilitate imaging procedures for patients</p> Signup and view all the answers

    What is created when a full set of profiles from each rotation is compiled and analyzed by a computer?

    <p>A two-dimensional image slice</p> Signup and view all the answers

    Which process is crucial for forming a two-dimensional image slice?

    <p>Compilation of profiles from rotations</p> Signup and view all the answers

    How does a computer contribute to the formation of a two-dimensional image?

    <p>By analyzing and compiling profiles from rotations</p> Signup and view all the answers

    Which of the following statements best describes the relationship between rotations and image formation?

    <p>Profiles from each rotation must be compiled for image formation</p> Signup and view all the answers

    Which of these options does NOT involve the formation of a two-dimensional image slice?

    <p>Using a camera to take photographs</p> Signup and view all the answers

    Study Notes

    Computed Tomography (CT) Equipment Techniques

    • CT is an imaging procedure using special X-ray equipment to create detailed pictures (scans) of areas inside the body
    • Also known as computerized tomography or computerized axial tomography (CAT)
    • Tomography originates from Greek words tomos (a cut, slice, or section) and graphein (to write or record)
    • CT is a non-invasive procedure creating cross-sectional images of the body
    • Each cross-section is like a slice of bread
    • These images are used for a variety of diagnostic and therapeutic applications

    Limitations of Film-Based Radiography

    • A major challenge of radiography is the overlapping of all structures on the film
    • This makes distinguishing small details difficult, sometimes impossible, especially when structures have similar densities
    • This is frequently the case with tumors and surrounding tissues

    Second Limitation of Radiography

    • Radiography is a qualitative process. This makes it hard to tell the difference between a uniform object with an uneven thickness, and a non-uniform object with a uniform thickness.

    • It's difficult to differentiate an object with the same thickness but a different composition from an object with different thicknesses, but the same composition

    Limitations of Conventional Tomography

    • The overlapping issue in radiography can be somewhat improved using conventional tomography, sometimes referred to geometric tomography.
    • This method involves moving the X-ray tube and film simultaneously in opposite directions.
    • The goal is to blur out structures above and below the intended section.
    • The limitations of tomography include persistent image blur that cannot be fully eliminated
    • It's hard to completely eliminate unwanted overlapping structures
    • Contrast is degraded by scattered radiation from the X-ray beam open geometry
    • Problems are caused by different film screen combinations

    CT Differences from Conventional Radiography

    • CT generates cross-sectional images removing overlapping structures
    • CT's sensitivity to subtle differences in X-ray attenuation is at least 10 times greater than traditional screen-film systems
    • This is primarily due to virtual elimination of scatter

    Purpose of CT Scans

    • CT scans provide detailed cross-sectional images of internal structures (organs, blood vessels, bones, soft tissue etc.)
    • Used for diagnostic purposes
    • Used to guide treatment, further tests, surgeries (biopsies, radiation therapy)
    • Used for detecting and monitoring conditions (such as cancer, heart disease, lung nodules, liver masses)

    CT Scan Technique

    • Uses digital geometry processing to generate 3D images from a large series of 2D X-ray images taken around a single axis of rotation.

    • A flat patient couch is positioned in a circular opening

    • The patient is positioned and the table in the gantry can be moved up, down, backwards, or forwards

    • The X-ray tube rotates around the patient

    • As the X-rays pass through the patient to the detectors, a computer system performs calculations

    • This results in a viewable image

    • One cross-sectional slice of the body is obtained for each complete rotation

    • Multiple shots (profiles), around 1,000, are acquired during each rotation

    • A two-dimensional image is compiled from the profiles

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    Computed Tomography Equipment Techniques PDF

    Description

    Test your knowledge on Computed Tomography techniques with this quiz focused on course content. Discover the technologies involved, the limitations of both radiography and tomography, and the terminology associated with imaging techniques. Suitable for students in medical imaging or related fields.

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