Radiography Quiz: Understanding Roles and Standards

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Questions and Answers

What is the primary purpose of a radiographer?

To administer ionizing radiation for diagnostic purposes (correct)

To maintain radiology equipment

To perform administrative tasks in a radiology department

To manage patient records

Which organization is responsible for maintaining the practice standards in radiography?

AHA

OSHA

ASRT (correct)

FDA

What does the ALARA principle stand for?

Assessment of Latent Atomic Radiation

As Low As Radiation Allows

As Low As Reasonably Achievable (correct)

Always Look At Radiation Amounts

The Code of Ethics for radiologic technologists is maintained by which organization?

ARRT Signup and view all the answers

Which of the following is NOT a role of a radiologic technologist?

Interpreting radiographic images Signup and view all the answers

Radiographic imaging primarily uses what type of energy?

Electromagnetic Signup and view all the answers

What is the term for the minimal part of the electromagnetic spectrum used in radiography?

X-rays Signup and view all the answers

What is the primary source of occupational radiation exposure for radiographers?

Scatter radiation Signup and view all the answers

What does the 'Inverse Square Law' describe?

The relationship between radiation intensity and distance from the source Signup and view all the answers

X-ray tube anodes are generally made of which material due to its high melting point?

Tungsten Signup and view all the answers

The component of the x-ray tube that emits electrons is called the:

Cathode Signup and view all the answers

Which of the following is NOT a component of a radiographic room?

MRI scanner Signup and view all the answers

Which type of radiation is used in fluoroscopy to create real-time images?

X-rays Signup and view all the answers

The ability to differentiate between small objects that have similar densities in an x-ray image is called:

Contrast resolution Signup and view all the answers

What is the typical unit used to measure the dose of radiation absorbed by a patient?

Gray Signup and view all the answers

Which factor does NOT affect the amount of radiation exposure to a radiologic technologist?

Patient's weight Signup and view all the answers

The collimator on an x-ray tube functions to:

Limit the size of the radiation beam Signup and view all the answers

How is the intensity of radiation at 2 meters from a source compared to that at 1 meter?

It is four times less Signup and view all the answers

A 'Bucky' is used in radiography to:

Improve image quality by absorbing scatter radiation Signup and view all the answers

Which term describes the unit of measurement for the number of disintegrations per second of a radioactive material?

Becquerel Signup and view all the answers

Which of the following best describes the purpose of a grid in radiographic imaging?

To increase the contrast of the image by absorbing scattered radiation Signup and view all the answers

In terms of patient management, what is critical when taking a radiograph?

Explaining the procedure to the patient Signup and view all the answers

The distance from the x-ray tube to the image receptor is known as the:

Source-to-image distance (SID) Signup and view all the answers

Which of the following is NOT a method to minimize patient motion during a radiographic procedure?

Increasing the distance between the patient and the image receptor Signup and view all the answers

How does magnification affect the spatial resolution of an image?

Decreases resolution Signup and view all the answers

Study Notes

Radiographer Roles and Responsibilities

Primary role involves administering ionizing radiation for diagnostic purposes.
Additional tasks include maintaining radiology equipment and managing patient records, though these are secondary roles.

Organizations in Radiography

The ASRT (American Society of Radiologic Technologists) oversees practice standards in radiography.
The Code of Ethics for radiologic technologists is set by the ARRT (American Registry of Radiologic Technologists).

Radiation Principles

ALARA principle stands for "As Low As Reasonably Achievable," emphasizing minimizing radiation exposure.
The 'Inverse Square Law' describes how radiation intensity decreases with increased distance from the source.

Radiation Types and Measurements

Radiographic imaging utilizes electromagnetic radiation, specifically X-rays.
The typical unit for measuring radiation dose absorbed by patients is the Gray.

Radiographic Equipment

X-ray tube anodes are commonly made from tungsten, chosen for its high melting point.
The collimator limits the size of the radiation beam and filters out low-energy x-rays.

Radiation Exposure Considerations

The primary occupational radiation exposure for radiographers comes from scatter radiation.
Factors affecting radiation exposure include time, distance, and shielding; a patient's weight does not influence exposure.

Image Quality and Processing

The term 'contrast resolution' refers to the ability to differentiate small objects with similar densities in an X-ray image.
A 'Bucky' improves image quality by absorbing scatter radiation.

Patient Management in Radiography

Critical aspects of patient management include explaining the procedure clearly to patients before conducting radiographs.
Minimizing patient motion is essential; methods include using shorter exposure times and giving clear instructions.

Measurement Units in Radiography

The Becquerel is the unit for measuring disintegrations per second of a radioactive substance.
The source-to-image distance (SID) refers to the distance from the x-ray tube to the image receptor.

Image Quality Factors

Magnification typically decreases the spatial resolution of an image, impacting detail clarity.
Grids increase image contrast by filtering scattered radiation, thus enhancing the overall quality of radiographic images.

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Description

Test your knowledge on the primary roles of a radiographer and the standards governing the practice. This quiz covers key concepts like the ALARA principle and the organizations that regulate radiography practices. Perfect for students in radiography programs.