Discover the Impact of Focal Spot and Film Crystals on Image Sharpness!
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Questions and Answers

Which of the following structures appear radiolucent on a dental image?

  • Dentin
  • Enamel
  • Fillings (correct)
  • Bone

    • What happens to the density of a dental image when the kilovoltage (kV) is increased?

  • The density decreases and the image appears lighter
  • The density remains the same
  • The density increases and the image appears darker (correct)
  • The density increases and the image appears lighter

    • What is the effect of increasing the exposure time on the density of a dental image?

  • The density decreases and the image appears lighter
  • The density increases and the image appears darker (correct)
  • The density increases and the image appears lighter
  • The density remains the same

    • Which of the following statements about digital imaging compared to traditional radiography is true?

    <p>Digital imaging performs at least as well as traditional radiography</p> Signup and view all the answers

    What is the reason why disposable plastic barrier sleeves are required for digital sensors?

    <p>To prevent cross-contamination</p> Signup and view all the answers

    What is a potential concern regarding the use of digital images as evidence in lawsuits?

    <p>Digital images are easily tampered with</p> Signup and view all the answers

    Which of the following is true about image sharpness in radiography?

    <p>The smaller the focal spot area, the sharper the image</p> Signup and view all the answers

    Which of the following is true about image magnification in dental imaging?

    <p>A shorter PID and target-receptor distance result in less image magnification</p> Signup and view all the answers

    What is the term used to describe a radiographic image that appears larger than the actual size of the object it represents?

    <p>Image magnification</p> Signup and view all the answers

    What is the purpose of the scintillator screen in a digital imaging sensor?

    <p>To convert x-ray beams into visible light</p> Signup and view all the answers

    Which of the following is a primary advantage of digital imaging compared to conventional film?

    <p>Superior gray-scale resolution</p> Signup and view all the answers

    What is the range of numbers for a pixel in a digital image?

    <p>0 to 255</p> Signup and view all the answers

    Which method of obtaining a digital image involves using an intraoral sensor exposed to x-radiation to transfer information directly to a computer?

    <p>Direct digital imaging</p> Signup and view all the answers

    What is the spatial resolution of a digital imaging system using a CCD sensor?

    <p>8 to 10 lp/mm</p> Signup and view all the answers

    Which type of contrast is preferred in dental images?

    <p>Short-scale contrast with black and white areas</p> Signup and view all the answers

    Which factor influences the sharpness of a dental image?

    <p>Focal spot size</p> Signup and view all the answers

    What is the term for the unsharpness or blurring of the edges of a dental image?

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

    What is the term for the difference in the degrees of blackness between adjacent areas on a dental image?

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

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