Digital Imaging
Conversion processes are categorized with what DR systems
What is direct and indirect conversion?
Operation involving the creation of a histogram and application of LUT
What is point processing?
Rigid sheet with several layers designed to record/enhance transmission of the image
What is Photostimulable Phosphor Imaging Plate?
Term used to describe the digital images on a computer monitor in image processing
What is soft copy?
Trend that results from increasing exposure technique to decrease chance of image noise and avoid repeats
What is dose creep?
What plates do computed radiography systems use?
What are photostimulable storage phosphor imaging plates?
Used to locate the minimum and maximum exposure values for the body part
What is VOI (Values of Interest)?
Defined as the physical distance between pixels, measured center to center
What is Pixel Pitch?
Feature Radiologists use to better visualize trabecular patterns within bone and micro-calcifications
What is edge enhancement?
Term known for cropping or shuttering
What is electronic masking?
A series of boxes laid out in rows and columns that gives form to the image
What is matrix?
Measures the sensitivity and accuracy when the IR converts data to the output viewing device
What is DQE (Detective Quantum Efficiency)?
Another name for Electron Traps
What are F-Centers?
The way computers locate VOI and determine EI
What is histogram shape and algorithm?
Higher kvp levels are used and as a result, something occurs to the acquired data
What is the width of data narrowing
Helped improve the development of modern radiological imaging
What is DICOM (Digital Imaging & Communication in Medicine)?
Mathematical calculations applied to a small group of pixels, continued until all pixels have been subjected to it
What is Kernel?
Referred to as the actual latent image
What are Europium Electron Holes?
Importance of selecting appropriately on the anatomical menu
What is lack of diagnostic quality due to correct brightness and contrast not being processed
Is responsible for lower visual/perceived resolution and obscuring anatomical features
What is photon starvation
The process used in order for analog signals to convert to a binary language
What is ADC (Analog to Digital Conversion)?
Often referred to for edge enhancement sharpness
What is High-Pass filtering?
Time where 25% of energy will be lost in a latent image
What is 8 hours?
Operations that happen during Pre-processing
What is exposure field recognition, histogram analysis, and grayscale analysis?
Result of incomplete image plate erasure
What is phantom or ghost images