Ultimate Quiz On Radiology

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| By Yarilsa

Yarilsa

Community Contributor

Quizzes Created: 1 | Total Attempts: 1,367

Questions: 8 | Attempts: 1,367 | Updated: Mar 21, 2023

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Questions and Answers

1.

Xrays are made up of
- A.
  
  Electrons
- B.
  
  Neutrons
- C.
  
  Photons
- D.
  
  Protons
Correct Answer
C. pHotons

Explanation
X-rays are a form of electromagnetic radiation, which consists of particles called photons. Photons do not have any mass or charge, and they travel at the speed of light. When high-energy electrons are accelerated and collide with a metal target, they produce X-rays through a process called Bremsstrahlung radiation. These X-rays are composed of photons, which have the ability to penetrate through tissues and create images used in medical diagnostics and other applications. Therefore, the correct answer is photons.

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2.

The portion of the target struck by electrons is called the
- A.
  
  Principle point
- B.
  
  End point
- C.
  
  Photon point
- D.
  
  Focal spot
Correct Answer
D. Focal spot

Explanation
The focal spot is the correct answer because it refers to the portion of the target that is struck by electrons. When electrons hit the target, they generate X-rays, and the focal spot is the area where these X-rays are produced. It is an important concept in radiography and imaging as it determines the resolution and clarity of the resulting image.

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3.

The generation of xrays requires
- A.
  
  Electrons
- B.
  
  Heating of the cathode
- C.
  
  A target
- D.
  
  A lead screen
- E.
  
  Cooling of the cathode
Correct Answer(s)
A. Electrons
B. Heating of the cathode
C. A target

Explanation
To generate X-rays, a few essential components are required. Firstly, electrons are needed as a source of energy. These electrons are then heated in the cathode, which allows them to gain sufficient energy to produce X-rays. Secondly, a target is needed, which is usually made of a heavy metal like tungsten. When the high-energy electrons hit the target, X-rays are generated. Additionally, a lead screen is used to absorb any scattered X-rays and prevent them from escaping the X-ray machine. Finally, cooling of the cathode is necessary to maintain the efficiency and longevity of the X-ray machine.

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4.

Milliamperage controls
- A.
  
  The speed electrons move from cathode to anode
- B.
  
  Cooling of the anode
- C.
  
  Heating of the anode
- D.
  
  Heating of the cathode
Correct Answer
D. Heating of the cathode

Explanation
The milliamperage controls the heating of the cathode. When the milliamperage is increased, more current flows through the cathode, causing it to heat up. This heating of the cathode is necessary for the emission of electrons, which then move from the cathode to the anode. Therefore, the milliamperage indirectly controls the speed at which electrons move from the cathode to the anode. The cooling of the anode is not directly related to the milliamperage, and the heating of the anode is not mentioned in the given information.

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5.

The cathode is a filament composed of
- A.
  
  Gold
- B.
  
  Silver
- C.
  
  Tungsten
- D.
  
  Copper
Correct Answer
C. Tungsten

Explanation
Tungsten is the correct answer because it is commonly used as the filament in cathodes. Tungsten has a high melting point and good resistance to heat, making it ideal for this purpose. It also has a low evaporation rate, ensuring that the filament lasts longer. Additionally, tungsten has a high electron emission capability, allowing for efficient electron flow in the cathode.

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6.

Collimation of the primary beam
- A.
  
  Dictates the contrast of the final radiograph
- B.
  
  Decreases the exposure time
- C.
  
  Restricts the shape and size of the beam
- D.
  
  Makes the primary beam more difficult to connect
Correct Answer
C. Restricts the shape and size of the beam

Explanation
Collimation of the primary beam refers to the process of restricting the shape and size of the beam. This is done by using lead shutters or collimators to shape the X-ray beam and limit its size to the desired area. By doing so, collimation helps to reduce scatter radiation and improve image quality by ensuring that only the relevant area is exposed to radiation. Therefore, the correct answer is that collimation restricts the shape and size of the beam.

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7.

The lead diaphagm determines the size and shape of the
- A.
  
  Electron cloud
- B.
  
  Film used
- C.
  
  Xray beam
- D.
  
  All of the above
Correct Answer
C. Xray beam

Explanation
The lead diaphragm determines the size and shape of the x-ray beam. This is because the lead diaphragm is used to control the collimation of the x-ray beam, which refers to the process of limiting the size and shape of the beam. By adjusting the lead diaphragm, the radiographer can ensure that only the desired area is exposed to radiation, reducing unnecessary exposure to other parts of the body. Therefore, the lead diaphragm plays a crucial role in determining the size and shape of the x-ray beam.

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8.

Proper collimation for the film size and target film distance will
- A.
  
  Increase the kvp
- B.
  
  Decrease the wavelength
- C.
  
  Decrease the radiation received by the patient
- D.
  
  Increase the wavelegh
Correct Answer
C. Decrease the radiation received by the patient

Explanation
Proper collimation for the film size and target film distance refers to aligning the X-ray beam precisely to the area of interest and reducing the radiation field to the necessary size. By doing so, unnecessary radiation exposure to the patient is minimized, resulting in a decrease in the radiation received by the patient. This ensures that only the required area receives radiation, reducing the potential risks associated with excessive radiation exposure.

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Current Version
Mar 21, 2023

Quiz Edited by
ProProfs Editorial Team
Aug 07, 2010

Quiz Created by
Yarilsa

Ultimate Quiz On Radiology

Xrays are made up of

The portion of the target struck by electrons is called the

The generation of xrays requires

Milliamperage controls

The cathode is a filament composed of

Collimation of the primary beam

The lead diaphagm determines the size and shape of the

Proper collimation for the film size and target film distance will