X-Ray Tube Components Quiz

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Questions and Answers

What is the primary function of the filament in the cathode of the x-ray tube?

To create a vacuum within the glass envelope

To emit electrons when heated (correct)

To focus the x-ray beam towards the anode

To produce high voltage for x-ray generation

Which part of the x-ray tube serves to direct electrons towards a specific area on the anode?

The focusing cup (correct)

The tube window

The filament

The glass envelope

What distinguishes the tube window from the rest of the glass envelope?

It contains the cathode and anode components

It is coated with a special material to enhance x-ray output

It allows for emission of x-rays while minimizing attenuation (correct)

It is thicker than the other glass segments

In the context of an x-ray tube, which statement accurately describes the role of the cathode?

It serves as the negative electrode that generates x-rays Signup and view all the answers

Which of the following correctly identifies the components of the cathode in an x-ray tube?

Filament and focusing cup Signup and view all the answers

What property of tungsten contributes to its unlikely burning out in applications similar to light bulbs?

Its high melting point Signup and view all the answers

What would happen if tungsten vaporized easily?

The internal parts would be coated with tungsten Signup and view all the answers

Why is it significant that tungsten does not vaporize easily in a light bulb scenario?

It avoids the formation of gas inside the tube Signup and view all the answers

Which of the following could happen if tungsten did vaporize easily?

The tube would become less effective Signup and view all the answers

What is a key characteristic of tungsten that makes it ideal for high-temperature applications?

It has a very high melting point Signup and view all the answers

What is the general size of the filament discussed?

Approximately 2 mm in diameter and 1 or 2 cm long Signup and view all the answers

How does the filament's design compare to those found in common household appliances?

It is similar but much smaller than those in household appliances Signup and view all the answers

Which property of the filament is specifically mentioned in its description?

Its diameter and length Signup and view all the answers

What is the primary function of a filament in an appliance?

To conduct electricity and produce light or heat Signup and view all the answers

In terms of physical dimensions, how does the described filament differ from a standard kitchen toaster filament?

It has a smaller diameter and specific length of 1 or 2 cm Signup and view all the answers

What effect does reducing the target angle have on the effective focal spot size?

The effective focal spot size decreases. Signup and view all the answers

What determines the value given when identifying small or large focal spots?

The target angle in relation to the focal spot. Signup and view all the answers

In radiography, what is generally the relationship between focal spot size and image resolution?

Smaller focal spots yield better image resolution. Signup and view all the answers

Which statement about focal spots is incorrect?

The value assigned to focal spots is precise regardless of the target angle. Signup and view all the answers

What happens to the effective focal spot when an angle is made smaller?

It becomes sharper and more defined. Signup and view all the answers

What is the correct arrangement of filaments in bi-angle x-ray tubes?

The small focus filament should be positioned above the large filament. Signup and view all the answers

Which of the following statements is true regarding the placement of filaments in bi-angle x-ray tubes?

The orientation of filaments affects the quality of the x-ray beam. Signup and view all the answers

Why must the small focus filament be placed above the large filament in bi-angle x-ray tubes?

To optimize the x-ray production efficiency. Signup and view all the answers

In the design of bi-angle x-ray tubes, what is the significance of placing filaments end to end?

It enhances the precision of the x-ray focus. Signup and view all the answers

What potential issue can arise if the filaments in bi-angle x-ray tubes are not arranged correctly?

Compromised image quality due to improper focus. Signup and view all the answers

Study Notes

Tube Window

A segment of glass thinner than the rest of the glass envelope

Cathode

Negative side of the x-ray tube
Composed of a filament and a focusing cup
Filament is a coil of wire similar to a kitchen toaster but much smaller
Filament is approximately 2 mm in diameter and 1 to 2 cm long
Filament is made of tungsten which has a melting point of 3410°C, making it resistant to burning out
Tungsten doesn't vaporize easily, preventing the tube from becoming gassy and coating internal parts
Filaments in bi-angle x-ray tubes are placed "end to end" with the small focus filament above the large filament
The focal spot size is determined by the target angle, a smaller target angle results in a smaller effective focal spot size

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Description

Test your knowledge on the components of an x-ray tube, including the tube window and cathode. This quiz covers essential details such as materials, design, and function of the filaments and their importance in x-ray production. Perfect for students studying radiology or medical imaging.