LRA 221- digital imaging-Week 1- Chapter 1, 2, and 3-Digital
Radiography and PACS- key terms, review questions, and stud
topics.
1.Digital Imaging: any imaging acquisition process that produces an
electronic image that can be viewed and manipulated on a computer
2.Teleradiology: moving images via telephone lines to and from remote
locations
3.Photostimulable phosphor (PSP) image capture
(previously known as computed radiography [CR]): the digital acquisition
modal- ity that uses storage phosphor plates to produce projection
images.
4.flat panel detector (FPD): a system that uses an X-ray absorber material
coupled to a thin-film transistor (TFT), complementary metal oxide
semiconductor (CMOS), or charge-coupled device (CCD) to form the
image.
2 categories: Indirect capture and Direct capture.
5.Indirect capture digital radiography: devices absorb X-rays and convert
them into light. The light is then collected by an area-CCD, CMOS, or
TFT array and then converted into an electrical signal that is sent to the
computer for processing and viewing
6.Direct capture digital radiography: devices convert the incident X-ray
energy directly into an electrical signal, typically using a
photoconductor as the X-ray absorber, and send the electrical signal to
a TFT and then to an ADC. The ADC signal goes to the computer for
processing and viewing
7.PACS (Picture Archiving and Communication System): networked
group of computers, servers, and archives that can be used to
manage digital images.
- where images are stored digitally
8.DICOM (Digital Imaging and Communications in Medicine): standards
,that allow imaging modalities and PACS to communicate in the same
"language"
9.Which radiographic image capture method uses chemical development
to produce the manifest image?: Film/screen radiography
10.Which company was the first to introduce PSP imaging commercially
in the United States?: Fuji
11.Which radiographic image capture method uses an X-ray absorber ma-
terial coupled with a thin film transistor, complementary metal oxide semi-
conductor, or a charge-coupled device (CCD) to form the digital
radiographic image?: FPD
12.When X-rays strike a photostimulable phosphor material,
is released.: light
13.The exposure latitude of digital projection radiography responds in a
manner.: linear
14.The acronym PACS stands for which of the following terms?
a. Picture arrival computer system
b. Picture archival computer system
, c. Picture arrival communication system
d. Picture archiving and communication system: d. Picture archiving and
com- munication system
15.In what format must images be in so that they can be sent throughout
the image viewing system?: DICOM
16.(T/F) Patient demographics are unimportant because the RIS will
automat- ically identify all digital images.: False
17.(T/F) Digitally placed anatomic markers can always be used to
determine the correct anatomic side of the patient.: False
18.(T/F) Digital systems are less sensitive to scatter radiation than
film/screen systems.: False
19.Conventional Film/Screen Radiography: -Uses film and intensifying
screens (F/S) in image production.
-The film is processed chemically.
-Uses a traditional x-ray room with existing table and wall Buckys
-light and x-ray photons interact with silver halide grains in the film
emulsion
-Nonlinear characteristic response of the film (cannot change image at
all)
20.Latent Image: invisible image created after exposure but before
processing
21.Manifest Image: visible image after processing
22.Analog: A continuous method of representing information.
-are made up of continuous, varied levels of brightness and colors
-ex. regular watch
23.Digital Images/Radiographs:
01010101 ex. digital electronic watch
24.PSP Image Capture- (CR): -Store x-ray energy for an extended time
(electrons can be lost or degraded if not processed quickly)
-Electrons-light-digital
-uses a traditional x-ray room with existing table and wall Bucky
assemblies.
-Most are made of a barium fluorohalide with europium activator.
- a focused laser scans the plate, causing the electrons to return to
their original state, emitting light in the process.
- linear repsonse (can change image)
-exposure latitude is wide (can change image)
-every detector is sensitive to a wide range of exposures
Radiography and PACS- key terms, review questions, and stud
topics.
1.Digital Imaging: any imaging acquisition process that produces an
electronic image that can be viewed and manipulated on a computer
2.Teleradiology: moving images via telephone lines to and from remote
locations
3.Photostimulable phosphor (PSP) image capture
(previously known as computed radiography [CR]): the digital acquisition
modal- ity that uses storage phosphor plates to produce projection
images.
4.flat panel detector (FPD): a system that uses an X-ray absorber material
coupled to a thin-film transistor (TFT), complementary metal oxide
semiconductor (CMOS), or charge-coupled device (CCD) to form the
image.
2 categories: Indirect capture and Direct capture.
5.Indirect capture digital radiography: devices absorb X-rays and convert
them into light. The light is then collected by an area-CCD, CMOS, or
TFT array and then converted into an electrical signal that is sent to the
computer for processing and viewing
6.Direct capture digital radiography: devices convert the incident X-ray
energy directly into an electrical signal, typically using a
photoconductor as the X-ray absorber, and send the electrical signal to
a TFT and then to an ADC. The ADC signal goes to the computer for
processing and viewing
7.PACS (Picture Archiving and Communication System): networked
group of computers, servers, and archives that can be used to
manage digital images.
- where images are stored digitally
8.DICOM (Digital Imaging and Communications in Medicine): standards
,that allow imaging modalities and PACS to communicate in the same
"language"
9.Which radiographic image capture method uses chemical development
to produce the manifest image?: Film/screen radiography
10.Which company was the first to introduce PSP imaging commercially
in the United States?: Fuji
11.Which radiographic image capture method uses an X-ray absorber ma-
terial coupled with a thin film transistor, complementary metal oxide semi-
conductor, or a charge-coupled device (CCD) to form the digital
radiographic image?: FPD
12.When X-rays strike a photostimulable phosphor material,
is released.: light
13.The exposure latitude of digital projection radiography responds in a
manner.: linear
14.The acronym PACS stands for which of the following terms?
a. Picture arrival computer system
b. Picture archival computer system
, c. Picture arrival communication system
d. Picture archiving and communication system: d. Picture archiving and
com- munication system
15.In what format must images be in so that they can be sent throughout
the image viewing system?: DICOM
16.(T/F) Patient demographics are unimportant because the RIS will
automat- ically identify all digital images.: False
17.(T/F) Digitally placed anatomic markers can always be used to
determine the correct anatomic side of the patient.: False
18.(T/F) Digital systems are less sensitive to scatter radiation than
film/screen systems.: False
19.Conventional Film/Screen Radiography: -Uses film and intensifying
screens (F/S) in image production.
-The film is processed chemically.
-Uses a traditional x-ray room with existing table and wall Buckys
-light and x-ray photons interact with silver halide grains in the film
emulsion
-Nonlinear characteristic response of the film (cannot change image at
all)
20.Latent Image: invisible image created after exposure but before
processing
21.Manifest Image: visible image after processing
22.Analog: A continuous method of representing information.
-are made up of continuous, varied levels of brightness and colors
-ex. regular watch
23.Digital Images/Radiographs:
01010101 ex. digital electronic watch
24.PSP Image Capture- (CR): -Store x-ray energy for an extended time
(electrons can be lost or degraded if not processed quickly)
-Electrons-light-digital
-uses a traditional x-ray room with existing table and wall Bucky
assemblies.
-Most are made of a barium fluorohalide with europium activator.
- a focused laser scans the plate, causing the electrons to return to
their original state, emitting light in the process.
- linear repsonse (can change image)
-exposure latitude is wide (can change image)
-every detector is sensitive to a wide range of exposures
