Image Recording

Question 1

What film sizes are most commonly used in spot film cameras?

Answer 1

?

Question 2

What are the methods of recording the image produced by the fluoroscopic system?

Answer 2

?

Question 3

What are advantages of the spot film camera system?

Answer 3

?

Question 4

In Cinefluorography the x-ray beam is off when the shutter is closed as a…

Answer 4

Patient protection measure

Question 5

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?

Answer 5

9.5x 9.5

Question 6

When taking a spot film image using the spot film recorder system, what would be an appropriate range of mA for the exposure?

Answer 6

200-400

Question 7

In cinefluorography, the t.v camera is replaced with a…

Answer 7

Movie camera

Question 8

The output phosphor of modern image intensifiers is made of…

Answer 8

Zinc Cadmium Sulfide

Question 9

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…

Answer 9

Pressure plate

Question 10

The output phosphor produces approximately how much more light than the input phosphor?

Answer 10

50x

Question 11

What is the reason there is a time delay in exposing a spot film cassette?

Answer 11

• 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

Question 12

When the radiologist takes a static image on a spot film cassette, what device is employed in determining when to end the exposure?

Answer 12

Automatic Exposure Control circuit

Question 13

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?

Answer 13

0

Question 14

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?

Answer 14

• Negative charge on the photocathode

- Positive charge on the accelerating anode

Question 15

Where is the cassette located in the fluoro tower between exposures in order to protect if from scatter radiation?

Answer 15

In the park position

Question 16

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

Answer 16

False

Question 17

What is normally the weakest imaging link in television fluoroscopy?

Answer 17

The television monitor

Question 18

When the image intensifier is operated in a magnified view, this causes the focal point to do what?

Answer 18

Move closer to the input phosphor

Question 19

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.

Answer 19

Less than

Question 20

The radiation dose to the patient will _____ when the Image Intensifier is shifted to a magnified view.

Answer 20

Increase

Question 21

The mirror optical system of image monitoring used a system of _____ and _______ to monitor the image intensifier.

Answer 21

Mirrors and lenses

Question 22

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

Answer 22

False

Question 23

T.V monitoring allows for storing the image on ____ or ____ for future playback.

Answer 23

Discs

Tapes

Question 24

What type of t.v camera tube coupling is small, compact and easy to manipulate the fluoro tower?

Answer 24

Fiber optic system

Question 25

What system cannot accommodate auxiliary imaging systems such as a cine camera or a spot film camera?

Answer 25

Fiber optics