Digital Radiography and PACS: Key
Concepts and Image Formation with
questions and well verified answers
actual exam!!! 2026
What is digital imaging? - ANSWER -Any image acquisition process that produces an
electronic image.
What does DICOM stand for? - ANSWER -Digital Imaging and Communications in
Medicine.
What is the primary function of a PACS? - ANSWER -To store, retrieve, and share
medical images.
What technology did Hounsfield develop? - ANSWER -The first CT scanner.
What is the difference between direct and indirect capture digital radiography? -
ANSWER -Direct capture uses a photoconductor to convert x-rays to electrical signals,
while indirect capture converts x-rays to light before creating electrical signals.
What is a photostimulable phosphor (PSP)? - ANSWER -A technology used in computed
radiography that captures x-ray energy and stores it for later readout.
What are flat panel detectors (FPDs)? - ANSWER -Devices that use an x-ray absorber
material coupled to a TFT, CMOS, or CCD to form images.
, What is the role of an analog-to-digital converter (ADC) in digital radiography? -
ANSWER -To convert electrical signals into digital data for image processing.
What is teleradiology? - ANSWER -The transmission of radiological images via telephone
lines to remote locations.
What was the first commercial CT scanner designed to image? - ANSWER -The head
only.
How does the latent image formation process work in conventional film/screen radiography? -
ANSWER -X-rays strike an intensifying screen, producing light that interacts with silver
halide grains in the film emulsion, forming a latent image.
What is the significance of the 1996 law regarding PSP use? - ANSWER -It will drive a
decrease in PSP use due to reduced Medicare reimbursements starting in 2018.
What is the role of a technologist QC workstation? - ANSWER -To ensure quality control
of the digital imaging process.
What are storage phosphor plates similar to? - ANSWER -Intensifying screens, as they
store x-ray energy for an extended time.
What is the main disadvantage of indirect capture digital radiography? - ANSWER -It
generally has lower spatial resolution compared to direct capture.
What is the purpose of the manifest image in film radiography? - ANSWER -It is the
visible image that results after the film has been chemically processed.
What are the two types of flat panel detectors? - ANSWER -Indirect capture and direct
capture.
Concepts and Image Formation with
questions and well verified answers
actual exam!!! 2026
What is digital imaging? - ANSWER -Any image acquisition process that produces an
electronic image.
What does DICOM stand for? - ANSWER -Digital Imaging and Communications in
Medicine.
What is the primary function of a PACS? - ANSWER -To store, retrieve, and share
medical images.
What technology did Hounsfield develop? - ANSWER -The first CT scanner.
What is the difference between direct and indirect capture digital radiography? -
ANSWER -Direct capture uses a photoconductor to convert x-rays to electrical signals,
while indirect capture converts x-rays to light before creating electrical signals.
What is a photostimulable phosphor (PSP)? - ANSWER -A technology used in computed
radiography that captures x-ray energy and stores it for later readout.
What are flat panel detectors (FPDs)? - ANSWER -Devices that use an x-ray absorber
material coupled to a TFT, CMOS, or CCD to form images.
, What is the role of an analog-to-digital converter (ADC) in digital radiography? -
ANSWER -To convert electrical signals into digital data for image processing.
What is teleradiology? - ANSWER -The transmission of radiological images via telephone
lines to remote locations.
What was the first commercial CT scanner designed to image? - ANSWER -The head
only.
How does the latent image formation process work in conventional film/screen radiography? -
ANSWER -X-rays strike an intensifying screen, producing light that interacts with silver
halide grains in the film emulsion, forming a latent image.
What is the significance of the 1996 law regarding PSP use? - ANSWER -It will drive a
decrease in PSP use due to reduced Medicare reimbursements starting in 2018.
What is the role of a technologist QC workstation? - ANSWER -To ensure quality control
of the digital imaging process.
What are storage phosphor plates similar to? - ANSWER -Intensifying screens, as they
store x-ray energy for an extended time.
What is the main disadvantage of indirect capture digital radiography? - ANSWER -It
generally has lower spatial resolution compared to direct capture.
What is the purpose of the manifest image in film radiography? - ANSWER -It is the
visible image that results after the film has been chemically processed.
What are the two types of flat panel detectors? - ANSWER -Indirect capture and direct
capture.
