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Questions and Answers
What are the two types of digital read systems mentioned in the text?
What material is more popular in direct read systems due to its atomic number?
What is the purpose of using CSI grown in 'needles' in flat panel detectors?
What is the function of conducting paths embedded within layers in indirect read systems?
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Which material is layered on the front surface of indirect flat panel detectors to convert X-ray to light?
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What is the purpose of edge enhancement in digital detectors?
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What is the function of post-processing tools in digital radiography?
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What is the purpose of convolution kernel in digital images?
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What is the term for the process of improving the visibility of specific aspects of an image?
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Which term is used to indicate which frequencies have been suppressed during the filtering process?
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What is the term for the concept of altering each matrix value by performing a math function on it using neighboring pixels' values?
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What is the term for the range of signal values that will be displayed as shades of gray?
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What does the term 'Window Level' refer to?
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What is the term for the mathematical instructions that indicate the set of values to be used in calculation?
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What is another term for 'low pass filter'?
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What does spatial filtering involve?
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What is the term for the concept of improving visibility of structures in a specific subset of the full range of signal values?
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What does the Window Width indicate?
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What is the term for the term applied to the filtering process to indicate which frequencies have been suppressed?
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What is the term for the process of deleting all but low frequencies during the filtering process?
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What is the purpose of high fill factor in digital radiography?
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What is the role of edge enhancement in digital radiography image processing?
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What is the purpose of smoothing in digital radiography image processing?
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What does the digital matrix consist of in digital radiography?
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What is the initial output of digital image receptors in digital radiography?
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What is the main goal of spatial smoothing algorithms in digital radiography image processing?
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What is the purpose of convolution in digital radiography image processing?
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What are the detector elements called in indirect CCL in digital radiography?
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What must pixels have to be useful in digital radiography?
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What is the effect of edge enhancement in digital radiography image processing?
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What is the default edge enhancement value in digital radiography image processing?
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What is the main component of digital radiography image processing that aims to reduce quantum mottle?
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Study Notes
Digital Radiography Image Processing Summary
- Indirect CCL collects light for the detector elements called dexels.
- Pixels must have electronic, light-sensitive, and detector areas to be useful.
- High fill factor is desired for better spatial resolution, with 100% fill factor being ideal.
- Digital matrix consists of voxels (depth) and pixels (picture elements).
- Initial stages of digital image receptors produce an analog signal, which is later digitized.
- Image processing options include edge enhancement and smoothing.
- Edge enhancement accentuates edges and is effective for fractures and high-contrast tissues.
- Default edge enhancement values are usually optimal, but radiologists may adjust them.
- Edge enhancement is helpful for detecting scaphoid fractures and making boundaries more distinct.
- Smoothing reduces display contrast and visibility of quantum mottle.
- Convolution involves manipulating digital images through mathematical operations using kernels.
- Spatial smoothing algorithms aim to reduce quantum mottle without losing clinically significant detail.
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Description
Test your knowledge of digital radiography image processing with this quiz. Explore topics such as the digital matrix, edge enhancement, smoothing, and the manipulation of digital images through convolution. Gain insights into the key concepts and techniques used in digital radiography image processing.
