Which pair of interactions accounts for most diagnostic x-ray attenuation in soft tissue at typical radiographic energies?
Radiologic Physics Equipment Protection
Question · Easy
What produces the continuous and discrete parts of a tungsten X-ray spectrum?
Radiologic Physics, Equipment, Biology, Protection
Flashcard
What is the main purpose of added filtration in a diagnostic x-ray tube housing?
Safety principle applied when selecting exposure factors so that the patient's radiation dose stays to a minimum.
Physics and protection
Guess the Term
Subject 1, Chapter 1: Physics of Radiology & X-Ray Production
1.1 Atomic Structure, Electromagnetic Spectrum & X-Ray Production Mechanisms
Study guide
Cheat sheet
Which generator component steps up voltage so electrons can be accelerated across the x-ray tube?
Read the clue and guess the term in 6 tries.
Game
Why do photoelectric absorption and Compton scattering affect an image differently?
Which radiation protection principle means keeping exposure as low as reasonably achievable while still obtaining diagnostic information?
International unit of absorbed dose, equal to one joule of energy deposited per kilogram of matter.
Which unit is commonly used to express absorbed radiation dose?
An approximately point source gives 160 µGy at 1 m. What is the predicted air kerma at 2 m?
An x-ray tube operates at 80 kVp. What is the maximum possible energy of a bremsstrahlung photon in the emitted spectrum?
Wearable badge that records a worker's radiation exposure in lithium fluoride crystals.
1.2 X-Ray Tube Components, Target Interactions & Emission Spectrum
If the frequency of an x-ray photon doubles in vacuum, how do its energy and wavelength change?
Question · Medium
Swap tiles to line up three of the same term.
Term Match
How can the anode heel effect help image anatomy of unequal thickness?
A chest radiograph is repeated because the image was too light on a film-screen system. If kVp remains unchanged, which change is most likely to increase film density?
Image Production Evaluation
Layer of aluminium or copper placed in the x-ray beam to remove its low-energy photons and cut unnecessary patient dose.
Which x-ray tube problem is most directly reduced by using a rotating anode instead of a stationary anode?
What does half-value layer measure, and how does filtration affect it?
During which phases of the cell cycle are mammalian cells generally most radiosensitive?
Networked setup that acquires, stores, sends and displays radiology studies at computer stations.
Image production
1.3 Photon Interactions with Matter: Photoelectric, Compton, Coherent & Pair Production
How is characteristic x-radiation produced at a tungsten target?
Flip two cards at a time to find matching terms.
Term Pairs
Why does a lower-ripple generator change output at the same indicated kVp and mAs?
Which quality control test evaluates whether the light field and x-ray field are properly aligned?
International standard that defines file formats for diagnostic scans and the data that goes with them, at the quality clinical work needs.
Which statement best explains the oxygen enhancement effect in low-LET radiation biology?
Why is rapid cell division an incomplete predictor of radiosensitivity?
A daily sensitometric control strip plots outside the established control limits on two consecutive readings. What is the best quality-assurance response?
Smallest two-dimensional cell of a digital radiograph; when its size is below the finest detail to be shown, no information is lost.
Subject 1, Chapter 2: Radiographic Equipment & Circuitry
2.1 High-Voltage Generators, Transformers & Rectification Circuits
A digital portable chest exposure is made at 2 mAs and 80 kVp. To maintain receptor exposure after increasing SID from 40 inches to 72 inches, what approximate mAs is needed?
Find five hidden terms in a grid of letters.
Term Search
How do tissue reactions differ from stochastic radiation effects?
Which technical change most directly reduces motion blur for a restless patient while maintaining receptor exposure?
Photostimulable phosphor sheet used instead of film in computed radiography, scanned by a laser to release its stored picture as light.
A technologist doubles mAs and increases kVp by 15 percent for the same projection. What is the most likely effect if no other factor changes?
Question · Hard
What information is needed after an unrecognized pregnancy was exposed during imaging?
A fluoroscopy unit shows normal kVp and mA displays but image brightness fluctuates when the table is moved. Which maintenance issue is most consistent with this symptom?
Short name for the live x-ray method that shows a continuous moving picture on a monitor, used to watch barium or a catheter pass through the body.
Positioning and procedures
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