ARRT registry review covering image acquisition & evaluation
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| What is another name for projection radiography or traditional radiography? | Screen-film (SF) imaging; Pg. 297
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| 4 details that image quality consists of: | image density, contrast or gray scale, recorded detail, and distortion; Pg. 298
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| The exposure/technical factors we use to create the image are what? | Milliamperage (mA), exposure time (s), kilovoltage (kV), and SID; Pg. 298
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| List all of the geometric factors. | OID, SID, Focal Spot Size, Distortion, Structural position and shape, and motion; Pg. 298
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| What term refers to the clarity, resolution, with which anatomic structures are represented in the x-ray image? | Recorded detail; Pg. 298
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| T/F: Geometrically recorded detail improves as OID decreases. | True; Pg. 301
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| T/F: Geometrically recorded detail improves as SID increases. | True; Pg. 301
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| T/F: An object will be foreshortened if a linear stucture is angled within the body, that is, not parallel with the long axis of the part/body and not parallel to the IR, that anatomic structure will appear smaller. | True; Pg. 303
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| What occurs when the x-ray tube is angled? | Elongation; Pg. 303
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| What three terms refer to the unsharpness around image details? | Focal spot blur, geometric unsharpness, edge gradient; Pg. 305
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| What, such as peristaltic activity, muscle spasms, and heart action, cannot be controlled by the patient? | Involuntary motion; Pg. 309
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| What is occasionally used to blur out unwanted structures so that the area of interest can be seen to better advantage? | Deliberate motion; Pg. 310
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| What percent of the exposure received by the film emulsion is from fluorescent light emitted by intensifying screen phosphors? | 98%; Pg. 311
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| T/F: Phosphors with low atmoic number react to x-ray photons more efficiently and possess greater speed. | False; *high atomic number; Pg. 312
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| T/F: Factors affecting density and contrast in SF imaging have little to no effect on similar characteristics seen in digital x-ray images. | True; Pg. 314
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| T/F: As the distance between the x-ray tube and the IR increases, exposure rate decreases according to the inverse square law. | True; Pg. 318
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| What amplifies the effect of x-rays on film emulsion by means of fluorescence. | Intensifying screens; Pg. 321
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| What are the two kinds of grids made? | Stationary and moving; Pg. 323
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| T/F: Balancing uneven tissue densities is less problematic in digital imaging. | True; Pg. 330
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| As changes are made in the size of the irradiation field, an accompanying change in ___ is require to maintain the same image density. | mAs; Pg. 336
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| T/F: Factors affecting density and contrast in SF imaging have little to no effect on similar characteristics seen in digital x-ray images. | True; Pg. 339
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| The function of what is to make image details visible. | Contast Scale; Pg. 340
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| T/F: As the size of the x-ray field is recuced, there is less area and tissue volume for scattered radiation to be generated. | True; Pg. 344
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| In radiography, what two terms are used to describe what image quality is? | Recorded detail and detail visibility; Pg. 354
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| As matrix size increases, for a fixed FOV, pixel size is ___ and better image resolution results. | Smaller; Pg. 355
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| If an IP and its PSP storage plate has been stored, unused, for an extended period of time, such as ____ hours, the PSP storage plate should be erased prior to use. | 48 Hours; Pg. 361
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| What offers wide dynamic range and automatic optimization of the radiologic image? | CR; Pg. 364
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| What must be appropriate for the type of film used, bright enough to provide adequate illumination, but must not expose the sensitive emulsions. | Safelight illumination; Pg. 382
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| What follows the processor developer, fixer, and wash tanks? | Dryer; Pg. 385
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| The PSP layer can store its latent image for several hours; however, after approximately ___ hours, noticeable image fading will occur. | 8; Pg. 391
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| What uses solid-state dectector plates as the x-ray image receptor to inercept the x-ray beam? | DR; Pg. 405
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| What are two examples of handling artifacts? | Scratches and dust; Pg. 419
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