Introduction to Radiography Exam 1 Questions and Answers Already Passed

Introduction to Radiography Exam 1 Questions and Answers Already Passed What is the invisible process that occurs on an X-ray detector before the image appears? The formation of the latent image. What happens when X-rays strike a radiopaque object? The object absorbs the X-rays, appearing white on the image. Why is tungsten used in the X-ray tube's anode? Its high melting point and efficient X-ray production. What is the "bremsstrahlung" effect in X-ray production? The release of X-rays as electrons are slowed down near the nucleus. How does collimation improve image quality? By reducing scatter radiation and focusing the beam on the area of interest. 2 Why does scatter radiation pose a problem in imaging? It reduces image contrast and can increase radiation exposure. What is the purpose of a rotating anode in high-capacity X-ray machines? To spread heat across a larger surface area and prevent damage. What is the first step in producing X-rays within the tube? Heating the filament to create an electron cloud. How does beam filtration affect patient safety? It removes low-energy X-rays that would only increase dose without improving the image. Why are grids positioned between the patient and the image receptor? To absorb scatter radiation and enhance image contrast. What is the difference between "hard" and "soft" X-rays? Hard X-rays have higher energy and penetrate deeper, while soft X-rays have lower energy and are more easily absorbed. 3 Why is it important to measure radiation dose for radiologic technologists? To monitor and maintain exposure within safe limits. What role does PACS play in modern radiography? It stores, retrieves, and distributes digital images efficiently. How does increasing kVp affect the X-ray beam? It increases the energy and penetration power of the beam. Why do radiographs of dense tissues like bone appear white? Bones absorb more X-rays, leaving fewer to reach the detector. What is the purpose of the cathode's focusing cup? To direct the electron stream toward the anode target. Why does the X-ray tube need a vacuum? To prevent electrons from colliding with air molecules and losing energy. 4 How does the inverse square law protect patients during imaging? By showing how increasing distance from the source reduces radiation intensity. What is the key difference between