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Fluoroscopy Part II > Fluoro Lecture 2 > Flashcards

Fluoro Lecture 2 Flashcards

1
Q

What are the two different ways to monitor images?

A
  1. Mirror Optical System

2. T.V Monitoring System

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2
Q

How do we couple the T.V camera tube to the OP of the Image Intensifier so we get bright light directly from the OP into the T.V camera?

A
  1. Make sure T.V camera is the same diameter as the OP
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3
Q

What are two methods of Coupling the T.V camera to the OP?

A
  1. Fiber Optic System

2. Lens System

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4
Q

What are Fiber Optics?

A
  • Glass strains that take the light signal and send it wherever you want it to go
  • Small, compact, easy to manipulate
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5
Q

What are disadvantages of the Fiber Optic System?

A

Cannot accommodate Auxiliary Imaging systems

Ex: Cine camera, Photo Spot film camera

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6
Q

Which one is larger, the Fiber Optic System or the Lens System?

A

The Lens System

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7
Q

Out of the Lens System and the Fiber Optic System. Which one needs to be handled with more care?

A

The Lens System

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8
Q

How does the Lens System work?

A

Accepts light from the OP and converts it into a Parallel beam

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9
Q

When using the Lens System how can the image be interrupted?

A

By a Beam Splitting mirror (a series of mirrors to direct the image) so only a portion (10-90%) is transmitted to the TV camera

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10
Q

When using a beam splitting mirror 10-90% of the image is transmitted to the TV Camera, what happens to the remainder of the image?

A

It is sent to a Spot Film

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11
Q

In the spot film camera, what size film is used?

A

70mm or 105mm

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12
Q

What are the (3) ways to record an image?

A
  1. Spot Film Recorder/ Cassette
  2. Spot Film Camera
  3. Cinefluorography (Movie Camera)
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13
Q

What is the standard size of a Spot Film Recorder film?

A

9 1/2 x 9 1/2”

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14
Q

What size cassettes could the spot film recorder take?

A

Varying sizes

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15
Q

What size spot films do we use today?

A

10 x 12”

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16
Q

When a cassette is in the fluoro tower, but pictures are not being taken, what is this called?

A

The park position

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17
Q

During Fluoro what is protecting the cassette, to allow it to be in the park position?

A

A sheet of lead

18
Q

How much is the time delay when taking a spot picture?

A

3/4- 1 sec

19
Q

What is the delay for when taking a spot film?

A

Its the time required to move the cassette into position and make it stationary

20
Q

Where is the rotor during fluoro?

A

Under the table

21
Q

How fast are x-ray tubes designed to run at?

A

3,600 rpm

22
Q

How fast do the rotors run during fluoro?

A

A few hundred rpm

23
Q

What are the (3) things that need to happen during the time delay?

A
  1. Position (cassette)
  2. Speed (rotor)
  3. mA (goes up)
24
Q

What are the (5) parts of the Cine Camera?

A

SALPP

  1. Shutter- opens/ closes
  2. Aperture- opening/ light goes in
  3. Lens-
  4. Pulldown arm- grabs & moves cassette down
  5. Pressure Plate- holds plate stationary/ releases
25
Q

What is the advantage to using a cine camera?

A

It increases image quality

26
Q

What is the disadvantage to using a cine camera?

A

Increases patient dose

27
Q

What are the advantages of using a Spot Film Camera?

A
  • Less exposure to patient
  • Exposure time shorter
  • Shorter delay in taking exposure because no cassette has to be moved into place
28
Q

What is the normal value of mA during fluoro?

A

0.5 - 5 mA (it’s low because it gets magnified)

29
Q

How much mA is being used for spot films?

A

200-400 mA

30
Q

What is the length of the exposure controlled by?

A

Phototimer

31
Q

Where is the filament element on the x-ray tube?

A

Cathode

32
Q

What is Cinefluorography?

A

The process of recording fluoroscopic images onto movie film (cine)

33
Q

What does spot film refer to?

A

Taking pictures of one specific part of anatomy

34
Q

What size film does the spot film camera use?

A

105mm

35
Q

How does the spot film camera receive it’s images?

A

From the OP via mirrors

36
Q

How many fps (frames per second) can the spot film camera take?

A

1-6 fps

37
Q

In Cinefluorography a T.V camera is replaced with what?

A

A movie camera

38
Q

What did spot film use to be on?

A
  • A spool of film
  • Techs would cut into 4 frame strips
  • Placed into 14x17 sheets
39
Q

Where is Cinefluorography used?

A
  • Angiography

- Cardiac Cath lab

40
Q

In general what does larger film format result in?

A

Better image quality, but increased patient dose

41
Q

How much of the image is transmitted to the t.v camera when a beam splitting mirror hits it?

A

10-90%

Fluoroscopy Part II (2 decks)

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