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Digital Radiography
Digital Radiography: An introduction Chapter 1and 2 (Euclid Seeram)
Question | Answer |
---|---|
This term refers to projection radiography or filmless radiography whereby computers process data collected from patients using special electronic detectors that have replaced the x-ray film cassette. | Digital radiography |
The log of the ratio of the intensity of the light falling upon radiology film to the intensity of the transmitted light through the film. | Optical density |
In the imaging process, a plot of the optical density to the logarithm of the relative radiation exposure. | Characteristic curve |
The purpose of the characteristic curve is to indicate the degree of _______ that a film can display using a range of exposures. | contrast |
The ____ _____ refers to the sensitivity of the film to radiation. | film speed |
The film speed is _______ proportional to the exposure | inversely |
Film based imaging is limited in its contrast resolution. Film-screen cannot show differences in tissue contrast less than ___%. | 10 |
____ _________ refers to the collection of x-rays transmitted through the patient. | Data acquisition |
The computer uses special software to create or build up digital images using the ______ number system. | binary |
Discrete units used by computers for processing information | bits |
A comprehensive computer system that is responsible for the electronic storage and distribution of medical images in the medical enterprise. | PACS |
What does PACS stand for? | Picture archiving and communication systems |
The application of information technology to medical imaging is referred to as ____ ______ ________. | Medical imaging informatics |