Fauber's Chapter 2-10 (Radiographic Imaging and Exposure) Questions & Answers 2024/2025

Fauber's Chapter 2-10 (Radiographic Imaging and Exposure) Questions & Answers 2024/2025 actual focal spot size - ANSWER-the size of the area on the anode target that is exposed to electrons from the tube current added filtration - ANSWER-the filtration that is added to the port of the r-ray tube anode - ANSWER--a positively charged electrode within the x-ray tube composed of molybdenum, copper, tungsten, and graphite - consists of a target and, in rotating anode tubes, a stator and rotor anode heel effect - ANSWER-the x-ray beam has greater intensity (# of x-rays) on the cathode side of the tube, with the intensity diminishing toward the anode side Bremsstrahlung Interactions - ANSWER--occur when a projectile electron completely avoids the orbital electrons of the tungsten atom and travels very close to it nucleus -the very strong electrostatic force of the nucleus cathode - ANSWER-a negatively charged electrode (within the X-ray tube) characteristic interactions - ANSWER-produced when a projectile electron interacts with an electron from the inner (k) shell of the tungsten atom and ejects it compensating filter - ANSWER-special filters added to the primary beam to alter its intensity dosimeter - ANSWER-A device that measures x-ray exposure effective focal spot size - ANSWER-Focal spot size as measured directly under the anode target exposure time - ANSWER-Determines the length of time that the x-ray tube produces x-rays filament - ANSWER-a coiled tungsten wire that is the source of electrons during x-ray production filament current - ANSWER-heats the tungsten filament. This heating causes thermionic emissions to occur. focusing cup - ANSWER-made of nickel and nearly surrounds the filament half-value layer (HVL) - ANSWER-the amount of filtration that reduces the intensity of the x-ray beam to one-half of its original value is considered the best method for describing the x-ray quality heat unit (HU) - ANSWER-the amount of heat produced from any given exposure inherent filtration - ANSWER-the filtration that is permanently in the path of the x-ray beam; the 3 components contribute are 1. glass envelope of the tube oil that surrounds the tube window in the tube housing kilovoltage - ANSWER-potential difference applied across the X-ray tube at the time the exposure is initiated leakage radiation - ANSWER-any x-rays, other than the primary beam, that escape the tube housing line-focus principle - ANSWER-describes the relationship between the actual and the effective focal spots in the X-ray tube miiliamperage - ANSWER-the unit used to measure the tube current off-focus radiation - ANSWER-occurs when projectile electrons are reflected and x-rays are produced from outside the focal spot rotor - ANSWER-a device in the X-ray tube that causes the target to rapidly rotate during x-ray production space charge - ANSWER-the electron liberated from the filament during thermionic emission that form a cloud around the filament space charge effect - ANSWER-the tendency of the space charge not to allow more electrons to boil off the filament stator - ANSWER-an electric motor that turns the rotor at very high speed during x-ray production target - ANSWER-a metal that abruptly decelerates and stops electrons in the tube current, allowing the production of x-rays thermionic emission - ANSWER-the boiling off of electrons from the cathode filament total filtration - ANSWER-the sum of the x-ray tube's added and inherent filtration trough filter - ANSWER-a double-wedge compensating filter added to the primary beam to produce more consistent exposure to the image receptor tube current - ANSWER-the flow of electrons from cathode to anode, measured in milliamperage voltage ripple - ANSWER-the amount of consistency in voltage waveforms during x-ray production wedge filter - ANSWER-the most common type of the compensating filter. the thicker part of the wedge filter is lined up with the thinner portion of the anatomic part that is being imaged, allowing fewer x-ray photons to reach that end of the part x-ray emission spectrum - ANSWER-The range and intensity of x-rays emitted. which X-ray tube component serves as a source of electrons for x-ray productions? - ANSWER-filament electrons interact with the ______ to produce x-rays and heat - ANSWER-target the cloud of electrons that forms before x-ray production is referred to as ____ - ANSWER-space charge the burning or boiling-off of electrons at the cathode is referred to as _____ - ANSWER-thermionic emission which primary exposure factor influences both the quantity and quality of x-ray photons? - ANSWER-kVp the unit used to express tube current is ____ - ANSWER-mA what percentage of the kinetic energy is converted to heat when moving electrons strike the anode target? - ANSWER-99% the intensity of the x-ray beam is greater on the - ANSWER-cathode side of the tube according to the line-focus principle, as the target angle decreases, the ____ - ANSWER-effective focal spot size decreases ________ extends X-ray tube life - ANSWER-warming up the tube after 2 hours of non-use which type of target interactions is responsible for most of the x-rays in the diagnostic beam - ANSWER-Bremsstrahlung interactions what value of the mAs is produced when the radiographer sets a kilo voltage peak.....