Major components of a digital Radiography Flashcards
(18 cards)
What is data acquisition in digital radiography?
It is the first step in image production, where remnant radiation (x-rays transmitted through the patient) interacts with the digital detector.
What is the role of electronic digital detectors in data acquisition?
They convert x-rays into electrical (analog) signals for further processing.
What are the two types of detectors used in digital radiography?
Detectors that first convert x-rays into light, then into electrical signals.
Detectors that convert x-rays directly into electrical signals.
What device converts analog signals into digital data?
An analog-to-digital converter (ADC).
What numerical system does the computer use to create digital images?
The binary number system (base 2, using 0s and 1s).
What is the function of the ADC in computer data processing?
It sends digital data for processing by a digital computer.
What are binary digits (bits)?
They are discrete units that are processed and transformed into digital images.
Why is a digital-to-analog converter (DAC) needed for image display?
Because the human eye cannot interpret raw digital data, so it must be converted into an analog signal.
How can radiographers manipulate images on a medical imaging workstation?
Using post-processing techniques.
What are the purposes of post-processing techniques in digital radiography?
Reduce image noise
Enhance image sharpness
Change image contrast
Why must digital radiology examinations be stored?
Retrospective analysis
Medical-legal purposes
What are common storage devices for digital radiology?
Magnetic tapes
Discs
Laser optical discs
Redundant Array of Independent Disks (RAID) in PACS
What is the role of computer communication networks in digital radiography?
To transmit images from acquisition to display/viewing stations and to other hospital departments.
What type of network is used for image transmission within a hospital?
Local Area Network (LAN).
What type of network is used for image transmission to remote locations?
Wide Area Network (WAN).
