Radiography Principles and Techniques Quiz
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Questions and Answers

What is true regarding low energy and wave length?

  • Wave length is unrelated to energy.
  • Low energy has a short wave length.
  • High energy has a long wave length.
  • Low energy has a long wave length. (correct)

Which of the following statements about collimation is correct?

  • Collimation is solely for improving image contrast.
  • Collimation does not affect the amount of tissue irradiated.
  • Collimation is only effective for reducing secondary radiation.
  • A collimator is used to control the size and shape of the beam. (correct)

Which factor does not positively affect film density?

  • Milliampere value increase.
  • Developing time increase.
  • Kilovoltage increase.
  • Longer exposure time. (correct)

What is the consequence of excessive bending of the film during exposure?

<p>Blurred film. (C)</p> Signup and view all the answers

What defines 'cone cut' in radiography?

<p>Clearly unexposed areas due to improper positioning. (A)</p> Signup and view all the answers

Which term describes the measure of damage to different organs from radiation?

<p>Relative biological effectiveness (RBE). (A)</p> Signup and view all the answers

How does increasing Kilovoltage (kV) affect film density?

<p>It increases film density. (C)</p> Signup and view all the answers

What happens to radiation when it changes direction without losing energy?

<p>Scattering. (C)</p> Signup and view all the answers

Which imaging technique is best for investigating the soft tissue component of the TMJ?

<p>MRI (C)</p> Signup and view all the answers

What type of radiation is produced when an outer shell electron fills an inner shell void?

<p>Characteristics radiation (D)</p> Signup and view all the answers

What is the primary source of electrons within the x-ray tube?

<p>Cathode Filament (A)</p> Signup and view all the answers

Which view is most effective for visualizing the submandibular salivary gland?

<p>Lower oblique occlusal (D)</p> Signup and view all the answers

Which material is the anode primarily made of in an x-ray tube?

<p>Tungsten (B)</p> Signup and view all the answers

Which of the following is NOT a basic principle of projection geometry for radiography?

<p>Film should be angled towards the source of radiation. (C)</p> Signup and view all the answers

Which of the following factors DOES NOT affect x-ray quality?

<p>Milliamperage (D)</p> Signup and view all the answers

What is the correct diagnosis for black dots or dark spots on a developed film?

<p>Accidental spilling of developer solution. (C)</p> Signup and view all the answers

Which radiograph is primarily used to image the coronal portions of the maxillary and mandibular posterior teeth?

<p>Bitewing (B)</p> Signup and view all the answers

The principle that emphasizes minimizing radiation exposure while obtaining necessary diagnostic information is known as?

<p>ALARA principle (C)</p> Signup and view all the answers

What is the maximum amount of whole body radiation a worker in an X-ray clinic should receive per year?

<p>50 rem (B)</p> Signup and view all the answers

The latent period in radiation biology refers to the time between exposure to radiation and which of the following?

<p>Clinical symptoms. (B)</p> Signup and view all the answers

To minimize exposure intervals for patients with neuromuscular problems, which method can be utilized?

<p>Using higher kilo voltage. (A)</p> Signup and view all the answers

What is the purpose of following the ALARA Principle in radiographic imaging?

<p>To minimize radiation exposure (D)</p> Signup and view all the answers

Which consequence can result from rough handling of film during processing?

<p>Pale film (A)</p> Signup and view all the answers

What visual artifact can occur if processing solutions are contaminated?

<p>Yellow stain (D)</p> Signup and view all the answers

What is the result of incorrect horizontal angulation in radiography?

<p>Overlapping of adjacent structures (D)</p> Signup and view all the answers

Which factor contributes to a cone cut artifact during imaging?

<p>Incorrect tube position and alignment (C)</p> Signup and view all the answers

What term is used to describe the difference in degree of darkening in a radiograph?

<p>Contrast (B)</p> Signup and view all the answers

In the bisecting angle technique, how should the central ray be directed?

<p>90 degrees to the imaginary bisector (B)</p> Signup and view all the answers

Which type of film is classified as periapical film used for examining the apical area of the tooth?

<p>Type II intra oral film (B)</p> Signup and view all the answers

Flashcards

Low energy waves

Have longer wavelengths.

Filtration in X-ray

Controls x-ray beam size and shape.

Film density factors - Exposure time

Decreasing exposure time decreases film density.

RBE

Measures radiation damage to organs/tissues.

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Focal spot size and image sharpness

Smaller focal spot produces sharper images.

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Occlusal film size

Type III (occlusal) film has a size of 3.4.

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Film emulsion softening process

Developing softens the x-ray film emulsion.

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Scattering

Change in photon direction, with or without energy loss.

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Large focal spot size

A larger area on the x-ray tube anode where electrons strike, resulting in a less focused x-ray beam.

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Film fog

Unwanted background darkening of x-ray film, reducing image quality.

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TMJ soft tissue imaging

Specific imaging technique used for inspecting the soft tissue components of the temporomandibular joint (disc).

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Characteristic radiation

X-rays produced when inner-shell electrons are filled by outer-shell electrons.

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X-ray tube cathode filament

The source of electrons in an x-ray tube, often heated to release electrons.

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X-ray Projection Geometry

Rules for taking radiographs that position the source, object, and film for clear images.

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Factors Affecting X-ray Quantity

Variables affecting the amount of x-rays produced, including mAs and distance.

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Factors Affecting X-ray Quality (except)

Variables that influence the penetrating power of x-rays, excluding distance.

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Developer Spots on Film

Dark spots on film, caused by developer solution spills.

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Panoramic X-ray Use

Used to view both the upper and lower jaws in one image.

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ALARA Principle in Radiography

Balancing the diagnostic benefits of radiography with radiation dose.

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Operator Radiation Protection (Max)

Yearly radiation limit for workers in x-ray clinics.

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Latent Period in Radiation Biology

Time between radiation exposure and clinical symptoms

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ALARA Principle in Radiography

Using the lowest possible radiation exposure to obtain an acceptable radiographic image.

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Film Scratches

Occur due to rough film handling during processing.

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Contaminated Processing Solutions

Lead to film discoloration (yellow stain) or developer spots if not properly rinsed.

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Incorrect Horizontal Angulation

Results in image distortion, where objects appear elongated or shortened.

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Cone Cut

An image imperfection resulting from improper tube positioning, alignment, or patient movement.

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Radiographic Contrast

The difference in degree of darkening in different areas of the radiograph.

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Film Emulsion

The part of the x-ray film that interacts with x-ray photons to create the image.

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Bisecting Angle Technique

Radiographic technique using a central ray perpendicular to the imaginary bisector between the long axis of the tooth and the film.

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