Image Recording Flashcards
What film sizes are most commonly used in spot film cameras?
?
What are the methods of recording the image produced by the fluoroscopic system?
?
What are advantages of the spot film camera system?
?
In Cinefluorography the x-ray beam is off when the shutter is closed as a…
Patient protection measure
In the older system of using cassettes with film, what was the standard size of the cassette that was used to take what is commonly referred to as a spot film?
9.5x 9.5
When taking a spot film image using the spot film recorder system, what would be an appropriate range of mA for the exposure?
200-400
In cinefluorography, the t.v camera is replaced with a…
Movie camera
The output phosphor of modern image intensifiers is made of…
Zinc Cadmium Sulfide
The device in the spot film camera and the cine camera that used to ensure that the film is steady during the exposure is the…
Pressure plate
The output phosphor produces approximately how much more light than the input phosphor?
50x
What is the reason there is a time delay in exposing a spot film cassette?
- Time required to move the cassette into position and hold it stationary
- Increase the mA from low fluoro value to high value for taking the spot film image
When the radiologist takes a static image on a spot film cassette, what device is employed in determining when to end the exposure?
Automatic Exposure Control circuit
The overhead x-ray tube has two filaments at the cathode side of the tube. These two filaments are for selecting the small and large focal spots. A certain image intensifier that has FOV sizes of 12, 9, 6 and 4.5 has four focal point locations. How many filaments are in this Image intensifier?
0
In order to propel the electrons from the photo cathode towards the accelerating anode in the image intensifier, a voltage must be applied across the intensifier. What is the polarity of this voltage?
- Negative charge on the photocathode
- Positive charge on the accelerating anode
Where is the cassette located in the fluoro tower between exposures in order to protect if from scatter radiation?
In the park position
Because the spot film camera used a mechanical film advance system, it was not able to take more than one frame per second. T/F
False
What is normally the weakest imaging link in television fluoroscopy?
The television monitor
When the image intensifier is operated in a magnified view, this causes the focal point to do what?
Move closer to the input phosphor
When operated in a magnified view, the number of electrons hitting the output phosphor will be ____ when compared to the number hitting it in the normal view.
Less than
The radiation dose to the patient will _____ when the Image Intensifier is shifted to a magnified view.
Increase
The mirror optical system of image monitoring used a system of _____ and _______ to monitor the image intensifier.
Mirrors and lenses
In the mirror optical system of imaging monitoring, light loss was not of concern due to all components being encased in a metal container. T/F
False
T.V monitoring allows for storing the image on ____ or ____ for future playback.
Discs
Tapes
What type of t.v camera tube coupling is small, compact and easy to manipulate the fluoro tower?
Fiber optic system
