ARRT registry review covering image production content area.
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| What is directly proportional to the number of x-ray photons delivered to the IR? | Intensity
P. 306
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| What is directly proportional to the number of x-ray photons delivered to the patient? | Dose
P. 306
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| Three things x-ray photons can do | Penetrate through the part, scatter within the part & be absorbed by the part.
P. 310
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| Filtration | Minimum 2.5-mm Al equivalent
P. 317
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| Examples of additive pathologies | Ascites, Pneumonia & Atelectasis
P. 318
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| Directly proportional to the intensity/exposure rate/number of x-ray photons produced | mAs
P. 322
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| This is used for anatomic parts having very different thickness/ absorption properties | Compensating filtration
P. 326
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| This determines grayscale | Bit depth
P. 334
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| High contrast is: | Short scale contrast; few, very different image/tissue densities
P. 338
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| Low contrast is: | Long scale contrast; many similar image/tissue densities
P. 338
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| The 2 different types of AECs | Phototimer & Ionization chamber
P. 350
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| What are some examples of destructive pathologic conditions? | Osteoporosis, emphysema & degenerative arthritis
P. 351
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| What improves digital image resolution? | Smaller pixel size, smaller pixel pitch & larger image matrix
P. 357
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| What increases CR resolution? | PSP phosphor size decreases, laser beam size decreases & monitor matrix size increases
P. 357
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| Image matrix size for nuclear medicine | 128x128
P. 357
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| What affects spatial resolution? | OID, SID, focal spot size, patient factors & motion
P. 358
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| What are the two types of distortion? | Size distortion (magnification) & Shape distortion (elongation and foreshortening)
P. 359
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| Ways to minimize involuntary motion? | Short exposure times, part support & stabilization and special immobilization devices
P. 367
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| Ways to minimize voluntary motion? | Good communication and suspended respiration
P. 367
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| What are the rare earth phosphors? | Gadolinium, lanthanum & yttrium
P. 370
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| The system that the radiographer selects the anatomic part from the console menu? | APR
P. 384
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| The x-ray detection system that does not have a scintillation component is? | Direct DR
P. 384
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| Misalignment of the tube-part-IR relationship results in | Shape distortion
P. 384
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| Effects of scattered radiation on the x-ray image includes | Produces fog & decreases contrast resolution
P. 385
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| The use of optimum kV for small, medium, & large body parts is the premise of? | Fixed kV, variable mAs technique chart
P. 385
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| What information should be included on each x-ray image? | Patient name/ ID number, side marker, exam date & institutions name
P. 390
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| This reduces exposed silver bromide to black metallic silver | Developer
P. 403
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| The invisible latent image is converted into a visible manifest image in the | Developer
P. 409
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| A CR histogram is a graphic representation of | Grayscale values of the imaged part
P. 409
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| X-ray production | Brems (70-90%) and Characteristic (10-30%)
P. 439
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| A shorter wavelength is associated with? | Higher frequency, higher energy & increased ionizing potential
P. 440
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| X-ray photon interactions with matter | Coherent/Classical Scatter, Photoelectric Effect & Compton Scatter
P. 441
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| This changes mechanical energy into electrical energy | Generators
P. 444
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| Tungsten as a target material | High atomic number increases x-ray production, high melting point to resist pitting and cracking & thermal conductivity for heat dissipation
P. 452
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| The effective focal spot is always smaller than the actual focal spot | Line focus principle
P. 455
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| Difference between pixel & voxel | Pixel is two dimensional and voxel is third dimensional
P. 466
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| Minimum inches between the focal spot and tabletop for fluoroscopic equipment | 12
P. 481
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| In the production of Bremsstrahlung radiation, the incident electron | Is deflected with resulting energy loss
P. 500
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| Image matrix size that will result in the best spatial resolution | 2,048x2,048
P. 500
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| These circuit devices operate on the principle of self-induction | Autotransformer and Choke coil
P. 500
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| Focal spot size can be evaluated by using a | Slit camera
P. 512
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| What is recommended for cleaning PSPs | Anhydrous Ethanol
P. 512
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| This contributes to inherent filtration | Glass envelope & x-ray tube port window
P. 512
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| What can cause poor screen-film contact? | Damaged cassette frame, foreign body in cassette & warped cassette front
P. 512
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| DICOM | Digital Imaging and Communications in Medicine
P. 468
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| The number of pixels in XY direction making up a digital image | Matrix
P. 466
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| Image matrix size used for chest radiography | 2,048x2,048
P.467
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| Filtration Summary | 50-70 kV = 1.5-mm Al equivalent
P. 456
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| Safe x-ray tube limits are demonstrated with | Tube rating charts & anode cooling curves
P. 457
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| The anode is made of: | Graphite/Molybdenum disk with beveled edge. Tungsten/Rhenium alloy focal track. Molybdenum stem.
P. 452
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