1. One frame of a TV image consists of how many lines - Correct Answer 525 nm
. A digital fluoroscopy system with a 1024 x 1024 matrix size is also called what? - Correct Answer 1000
line system
How does the pixel size and the matrix size of a digital fluorography system effect spatial resolution? -
Correct Answer Small pixel and large matrix has better resolution
According to cosine law, where should the viewer sit in relation to the workstation? - Correct Answer
Straight one
What is the major disadvantage of video tape recording opposed to cinefluorography filming - Correct
Answer Low resolution
What is normal integration time for humans? - Correct Answer .2 seconds
Increase distance between the patient and the image intensifier will result in a change in the patient
radiation dose as well as magnification of the images, what are the changes specifically? - Correct
Answer Increase dose and increase Magnification
Where is a cathode ray tube located? - Correct Answer Close circuit TV monitor
Give an example of an image recording system that captures and photographs the image from the
output phosphor of the Image Intensifier? - Correct Answer Cinefluorography and spot film camera
Horizontal resolution on a TV image is determined by what? - Correct Answer Bandpass, the higher the
band pass the higher the resolution.
In the US how many TV frames are there per second? - Correct Answer 30
, . What are rods in the eye responsible for? - Correct Answer night vision
Why does pulse progressive fluoroscopy result in lower patient dose compared to conventional image
intensified fluoroscopy? - Correct Answer Does not continue to a full dose, The tube is only activated for
a percentage of a second.
Using a 17/9 duel focus image intensifier, how magnified will the image be in mag mode? - Correct
Answer 1.8 (bigger over smaller)
Which medical flat panel digital display device will produce an image with higher resolution, 1 megapixel
or 5 megapixels - Correct Answer 5
When recording a fluoroscopy exam using a recording device such as cinefluoroscopy, what is the
entrance skin dose limit? - Correct Answer Unlimited
Using a duel focus image intensifier of 9/6 how much higher is patient dose using mag mode opposed to
normal mode? - Correct Answer 2.25 (bigger over smaller and square them) then divide
Name 3 ways that a fluoroscopist can minimize dose to the patient? - Correct Answer II closer to the
patient, shield, collimation, pulse mode, remove grid for smaller patient, lower rate of pulse progressive
What is vignetting? - Correct Answer Loss of brightness in the periphery of an image, brighter in the
center, associated with image intensifier fluoroscopy
Which fluoroscopy technology involves the direct digitization of the remnant x-rays exiting the patient
body? - Correct Answer Digital or flat panel fluoro?
What is the ESD for fluoro system used in boost mode? - Correct Answer 20R
What is the function of the photocathode in the Image intensifier? - Correct Answer Struck by light and
emits electrons
. A digital fluoroscopy system with a 1024 x 1024 matrix size is also called what? - Correct Answer 1000
line system
How does the pixel size and the matrix size of a digital fluorography system effect spatial resolution? -
Correct Answer Small pixel and large matrix has better resolution
According to cosine law, where should the viewer sit in relation to the workstation? - Correct Answer
Straight one
What is the major disadvantage of video tape recording opposed to cinefluorography filming - Correct
Answer Low resolution
What is normal integration time for humans? - Correct Answer .2 seconds
Increase distance between the patient and the image intensifier will result in a change in the patient
radiation dose as well as magnification of the images, what are the changes specifically? - Correct
Answer Increase dose and increase Magnification
Where is a cathode ray tube located? - Correct Answer Close circuit TV monitor
Give an example of an image recording system that captures and photographs the image from the
output phosphor of the Image Intensifier? - Correct Answer Cinefluorography and spot film camera
Horizontal resolution on a TV image is determined by what? - Correct Answer Bandpass, the higher the
band pass the higher the resolution.
In the US how many TV frames are there per second? - Correct Answer 30
, . What are rods in the eye responsible for? - Correct Answer night vision
Why does pulse progressive fluoroscopy result in lower patient dose compared to conventional image
intensified fluoroscopy? - Correct Answer Does not continue to a full dose, The tube is only activated for
a percentage of a second.
Using a 17/9 duel focus image intensifier, how magnified will the image be in mag mode? - Correct
Answer 1.8 (bigger over smaller)
Which medical flat panel digital display device will produce an image with higher resolution, 1 megapixel
or 5 megapixels - Correct Answer 5
When recording a fluoroscopy exam using a recording device such as cinefluoroscopy, what is the
entrance skin dose limit? - Correct Answer Unlimited
Using a duel focus image intensifier of 9/6 how much higher is patient dose using mag mode opposed to
normal mode? - Correct Answer 2.25 (bigger over smaller and square them) then divide
Name 3 ways that a fluoroscopist can minimize dose to the patient? - Correct Answer II closer to the
patient, shield, collimation, pulse mode, remove grid for smaller patient, lower rate of pulse progressive
What is vignetting? - Correct Answer Loss of brightness in the periphery of an image, brighter in the
center, associated with image intensifier fluoroscopy
Which fluoroscopy technology involves the direct digitization of the remnant x-rays exiting the patient
body? - Correct Answer Digital or flat panel fluoro?
What is the ESD for fluoro system used in boost mode? - Correct Answer 20R
What is the function of the photocathode in the Image intensifier? - Correct Answer Struck by light and
emits electrons
