Materials
Scintillator
This refers to contrast resolution being quantified as part of the total resolution capability.
Modulation Transfer Function (MTF)
As pixel size decreases, spatial resolution:
increases
What is the standard format for digital medical images?
DICOM
What is another name for a DEL?
Acquisition pixel
What is a scintillator, for indirect capture DR, utilizing a CCD, made of?
Cesium iodide
This component allows electrical signals from the array of DELS to flow to the computer
TFT
As the matrix size increases, the pixel size:
decreases
What is teleradiology?
Which type of scintillator provides the best spatial resolution?
Structured (columnar)
What does amorphous silicon do?
It is the portion of the DEL that senses light (photodetector)
This is the useful imaging area of each DEL
Fill factor
As the matrix size decreases, the spatial resolution:
Decreases
The Radiologist should have a display monitor for interpretation of general radiographic studies of: _____
And _____ for digital mammos.
2 MP
5 MP
What is a graphic representation of pixel values
Histogram
What material does a DR direct capture utilize to avoid the loss of resolution?
Selenium (Photoconductor)
What are the two methods for indirect capture in DR?
Scintillators with CCDS
Scintillator, silicon and TFT array
What is the highest spatial frequency a digital detector can record?
Nyquist Frequency
What type of storage involves a removable tape or media stored on a shelf?
Offline storage
What is the name for assigning a value to each DEL as it transfers to the computer?
Quantization
A CCD could be used in place of what material?
Silicon
What is the value that indicates exposure to the patient with DR imaging?
DAP
This test assesses the system's ability to display images of diferent parts of an image with high fidelity:
Resolution
Data that is stored in several backups to maximize efficiency of retrieval is stored in/on:
RAID
What is the purpose of an HL7?
Allows HIS to interface with RIS