Digital Radiography And PACS: Questions With
Proven Solutions
Digital imaging Correct Answer - Any image acquisition process that
produces an electronic image that can be viewed and manipulated on a
computer
Why were early PACS systems developed? Correct Answer - So the US
military could send images between battlefields and the VA hospitals
T/F FPD was easily accepted by all Correct Answer - False CR was easily
accepted after film
Process of FPD indirect Correct Answer - X-rays to light to electric
Process of FPD direct Correct Answer - X-rays to electric
Device that takes X-rays and convert them directly into an electrical signal
Correct Answer - Photoconductor made of amorphous selenium
Device that takes X-rays and converts them into light Correct Answer -
Scintillator
Scintillator materials Correct Answer - cesium iodide and gadolinium
oxysulfide
Cesium iodide characteristic Correct Answer - Structured crystals
Gadolinium Oxysulfide characteristic Correct Answer - Unstructured or
turbid
Characteristic response of conventional film Correct Answer - Non-
linear (only mid-section gives diagnostic image)
Characteristic response of digital (PSP and FPD) Correct Answer -
Linear (sensitive to a wide range of exposures
Proven Solutions
Digital imaging Correct Answer - Any image acquisition process that
produces an electronic image that can be viewed and manipulated on a
computer
Why were early PACS systems developed? Correct Answer - So the US
military could send images between battlefields and the VA hospitals
T/F FPD was easily accepted by all Correct Answer - False CR was easily
accepted after film
Process of FPD indirect Correct Answer - X-rays to light to electric
Process of FPD direct Correct Answer - X-rays to electric
Device that takes X-rays and convert them directly into an electrical signal
Correct Answer - Photoconductor made of amorphous selenium
Device that takes X-rays and converts them into light Correct Answer -
Scintillator
Scintillator materials Correct Answer - cesium iodide and gadolinium
oxysulfide
Cesium iodide characteristic Correct Answer - Structured crystals
Gadolinium Oxysulfide characteristic Correct Answer - Unstructured or
turbid
Characteristic response of conventional film Correct Answer - Non-
linear (only mid-section gives diagnostic image)
Characteristic response of digital (PSP and FPD) Correct Answer -
Linear (sensitive to a wide range of exposures
