ARRT registry review covering Image Acquisition and Evaluation
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| show | OID, SID, Focal Spot Size, Patient factors, intensifying screens, and motion (pg. 298)
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| Term referring to misrepresentation of the actual size or shape of the structures imaged | show 🗑
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| show | Resolution (pg. 299)
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| Term that refers to how well recorded detail can be seen | show 🗑
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| show | Foreshortening and Elongation (pg. 299)
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| show | Good communication and suspended respiration (pg. 309)
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| show | Short exposure time (pg. 309)
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| show | phosphor size increases, active/phosphor layer thickness increases, phosphor sensitivity increases, screen reflectance increases, recorded detail decreases (pg. 312)
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| show | High (pg. 312)
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| show | Density (pg. 314)
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| show | Reciprocity Law (pg. 317)
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| The single most important factor associated with image density | show 🗑
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| Minimum change in mAs to notice a recognizable change in density | show 🗑
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| show | I1/I2 = D2^2/D1^2 (pg. 319)
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| Density maintenance formula | show 🗑
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| show | Directly (pg. 321)
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| Device used to absorb unwanted scatter radiation before it reaches the IR | show 🗑
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| show | 10 cm and greater (pg. 323)
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| Contributing factors to scatter radiation production | show 🗑
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| Unwanted absorption of the useful x-ray beam with resulting loss of density across the image | show 🗑
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| Types of grid use errors that contribute to grid cutoff. | show 🗑
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| show | Grid ratio (pg. 326)
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| Number of lead strips per inch in a grid is termed as | show 🗑
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| show | Plastic, fiber, or aluminum (pg. 327)
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| Grid conversion factors | show 🗑
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| show | 8:1, 16:1 (pg. 329)
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| show | 2.5 mm Al equivalent (pg. 330)
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| Purpose of filtration | show 🗑
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| Formula for total filtration | show 🗑
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| show | anatomic parts with very different thickness/absorption properties, and to balance the differences in these densities. (pg. 330)
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| Pathologic conditions that would require an increase in technique to produce a diagnostic image. | show 🗑
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| show | Osteoporosis, osteomalacia, pneumoperitoneum, emphysema, degenerative arthritis, atrophic and necrotic conditions (pg. 333)
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| True or False: Beam restriction (collimation) reduces production of scattered radiation and, consequently, decreases image density. | show 🗑
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| To use the anode-heel effect properly, the larger/thicker body part needs to be positioned on the ________ side. | show 🗑
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| show | True (pg. 336)
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| When an image only contains a few number of densities, the image is considered to be of what scale? | show 🗑
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| When there are many shades of densities with only slight differences between them on an image, this image is said to be... | show 🗑
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| Subject contrast is a result of ________ ________. | show 🗑
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| show | High contrast/short scale contrast (pg. 340)
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| What type of image contrast does high kVp create? | show 🗑
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| Function of the contrast scale | show 🗑
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| show | Collimation, Optimum kVp, and thickness/density of tissues (compression). (pg. 344)
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| Without the use of a grid, scattered radiation can contribute to ___________ of the total image exposure. | show 🗑
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| show | Scattered radiation cleanup increases and contrast improves, contrast scale decreases (higher contrast results), exposure factors must increase, patient dose increases, and positioning latitude decreases. (pg. 347)
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| show | Ionization chamber and phototimer. (pg. 350)
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| show | Accurate positioning of body part of interest over selected photocell(s). (pg. 352)
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| True or false: Digital imaging has better spatial resolution than traditional film based imaging. | show 🗑
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| Related to the number of shades of gray within an image and is measured in bits | show 🗑
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| show | Smaller, increases (pg. 355)
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| Described as how much of the patient is included in the image matrix. | show 🗑
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| show | High SNR (pg. 356)
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| show | Detective Quantum Efficiency (DQE). (pg. 356)
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| show | cesium iodide, barium fluorohalide, and amorphous selenium. (pg. 356)
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| List the layers of a PSP in order | show 🗑
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| The latent image can remain on a PSP for up to ______ hours before image fading is noticeable. | show 🗑
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| show | 48. (pg. 359)
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| Which step does a direct capture DR system eliminate in image production? | show 🗑
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| Smaller detector element size within a thin film transistor, the ________ the spatial resolution. | show 🗑
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| A computer system that serves to track patient information (Admission/discharge, diagnostic treatment services, pharmaceutical and equipment information/ billing information, and employee information. | show 🗑
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| Computer system that allows procedure ordering/scheduling, patient database maintenance, reporting and transcription, and billing within the radiology department. | show 🗑
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| The most common result of improper film storage. | show 🗑
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| show | Below 70 degrees F. (pg. 381)
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| Atmospheric humidity for film storage should be ... | show 🗑
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| show | Wire mesh test (pg. 383)
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| show | Handling, Processing, and Exposure. (pg. 383)
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| show | Patient name/identification number, side marker (right or left), examination date, and institution's name. (pg. 384)
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| Type of grain or crystal suspended within gelatin of film emulsion. | show 🗑
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| show | Converts latent image into the manifest silver image by reducing the exposed silver bromide grains to black metallic silver. (pg. 385)
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| Purpose of activator solution in chemical film processing. | show 🗑
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| show | Prevents rapid oxidation to developer. (pg. 385)
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| Purpose of restrainer solution in chemical film processing. | show 🗑
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| show | Clears the film of unexposed, undeveloped silver bromide grains. (pg. 386)
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| Purpose of the "wash" process within chemical film processing. | show 🗑
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| show | Re-hardens gelatin emulsion to protect film from abrasions. (pg. 386)
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| show | Crossover racks. (pg. 387)
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| Located at the bottom of deep racks and serve to change the film direction as it changes from downward to upward motion. | show 🗑
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| Temperature range that is maintained within a chemical processor. | show 🗑
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| show | Metallic displacement cartridges and electrolytic silver recovery. (pg. 388 & 389)
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| Three cycles a PSP undergoes | show 🗑
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| A graphic representation of pixel value distribution | show 🗑
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| Factors that affect a historgram analysis | show 🗑
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| show | the number of gray shades (Pg. 396)
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| A change in the window level changes... | show 🗑
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| The acronym PACS stands for... | show 🗑
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| show | Patient motion, excessive OID, insufficient SID, inappropriate screen/film combination, too large of focal spot. (Pg. 405)
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| show | improper alignment of x-ray tube, body part, and image receptor (Pg. 405)
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| Uses for slower screen speeds (i.e. 100) | show 🗑
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| show | electromagnetic radiations such as ultra-violet and gamma, as well as particulate radiations such as alpha and beta particles. (Pg. 408)
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| Greatest enemy to image detail. | show 🗑
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| Solution that is recommended for cleaning PSPs. | show 🗑
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