Image Acquisition and Evaluation II
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| What are the geometric factors of film screen and digital imaging pp.298 | OID, SID, Focal spot size, Distortion, Structural position and shape, and motion
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| Recorded Detail pp. 298 | Clarity or resolution with which anatomic structures are represented in the image
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| What is the term used for CR/DR recorded detail pp. 299 | Spatial resolution
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| Distortion pp.299 | Misrepresentation of the actual size or shape of the structures imaged
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| What is a border of unsharpness around image details pp. 305 | focal spot blur or edge gradient
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| What is the purpose of intensifying screens pp.310 | Reduce the required exposure to a fraction of the original exposure
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| What is the active ingredient in the intensifying screens pp.311 | Fluorescent phosphors
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| Radiographic density pp.314 | overall amount of blackening on a radiographic image
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| What is the signal most important technical factor associated with density? pp.317 | mAs
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| What is the formula for the inverse square law pp. 319 | I1/I2=d2^2/d1^2
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| What is the density maintenance formula pp. 319 | mAs1/mAs2=d1^2/d2^2
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| Quality and Quantity of an x-ray beam is affected by what pp. 320 | kV
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| What type of interaction is responsible for scattered radiation pp. 322 | Compton interaction
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| What is grid ratio pp.326 | the height of the lead strips compared with the distance between them
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| What type of environment and temperature should unexposed film be stored in? pp.381 | cool and dry environment and under 70 F
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| Guide shoes or deflector plates allow fil to change direction. Guide shoes sometime leave marks, what are those marks called? pp.387 | Guide shoe marks
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| What is a histogram pp.394 | A graphic representation of pixel value distribution
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| Window width changes affect what? pp. 396 | Changes in the number of gray shades
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| Window level changes affect what? pp. 396 | Affects change in the image brightness
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| Windowing refers to what? pp.406 | Some change made to window width and/or window level
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| Processing artifact pp.419 | artifact caused by chemical processing of film
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| Wire mesh test pp.383 | Screen must be tested periodically for screen-film contact
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| Dynamic range or pixel range is related to what? pp.355 | shades of gray
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| Fixed kV technique chart pp352 | A chart that specifies a particular kV for each body part or type of exam, it will provide adequate penetration and the appropriate scale of contrast
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| Additive pathology pp. 351 | increases tissue density, requiring an increase in exposure factors
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| Atelectasis is an example of what type of pathology pp. 351 | additive pathology
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| Degenerative pathology pp.351 | deterioration of the part, requiring a decrease in exposure factors
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| An example of degenerative pathology pp.351 | osteoporosis
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| What is the function of a grid? pp. 347 | Removes scatter radiation exiting the patient before it reaches the IR, improving contrast
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| What are the 3 factors that have a significant effect on the production of scattered radiation pp.344 | beam restriction, kv, and thickness and density of tissues
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