History of Computed Tomography Limitations Quiz

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Why does radiographic film fail to adequately demonstrate slight differences in subject contrast?

The film-screen combinations used today can only discriminate x-ray intensity differences of 5% to 10%. (correct)

X-ray beam geometry leads to persistent image blurring that cannot be removed.

Radiographic film is not sensitive enough to capture images of soft tissues.

Radiographic contrast cannot be adjusted after being recorded on the film.

What is a limitation of both radiography and tomography in terms of tissue contrast?

They cannot resolve very small differences in tissue contrast.

They cause persistent image blurring that cannot be eliminated.

They are unable to adequately demonstrate slight differences in subject contrast. (correct)

They do not allow adjustment of contrast after recording.

What problem arises from the open geometry of the x-ray beam in tomography?

Persistent image blurring that cannot be removed.

Inability to adjust the contrast after image recording.

Difficulty in demonstrating soft tissue characteristics.

Degradation of image contrast due to scattered radiation. (correct)

How can digital imaging modalities like CT overcome the limitations of traditional film-based imaging?

By allowing alteration of contrast through digital postprocessing techniques. Signup and view all the answers

What is a key advantage of CT scans over traditional radiography and tomography?

Ability to alter contrast after image acquisition. Signup and view all the answers

How do radiography and tomography ensure that only the desired section of the patient is imaged?

By moving the x-ray tube and film simultaneously and in opposite directions. Signup and view all the answers

What is the major shortcoming of film-based radiography?

Super-imposition of all structures on the film Signup and view all the answers

What is another term for Computed Tomography (CT)?

Computerized axial tomography (CAT) Signup and view all the answers

What does the term 'tomography' mean?

A cut, a slice, or a section Signup and view all the answers

In what manner do Computed Tomography (CT) images produce results?

Cross-sectional images Signup and view all the answers

What issues arise when structures differ only slightly in density in radiography?

Difficulty in distinguishing details Signup and view all the answers

Which term describes the difficulty and sometimes impossibility in distinguishing a particular detail in radiography?

Super-imposition of structures Signup and view all the answers

Which of the following is NOT an advantage of computed tomography (CT) over conventional radiography?

CT exposes the patient to a lower radiation dose Signup and view all the answers

Which of the following is NOT a common application of computed tomography (CT)?

Monitoring the effectiveness of weight loss programs Signup and view all the answers

What is the principle behind computed tomography (CT) imaging?

Detecting the absorption of X-rays as they pass through the body from multiple angles Signup and view all the answers

What is the approximate size (diameter) of the bore or opening in a typical computed tomography (CT) scanner?

24-28 inches Signup and view all the answers

Which of the following statements about computed tomography (CT) is FALSE?

CT is primarily used for diagnostic purposes in fields other than medicine Signup and view all the answers

What is the main limitation of conventional radiography compared to computed tomography (CT)?

Conventional radiography has lower sensitivity to X-ray attenuation differences Signup and view all the answers

History of Computed Tomography Limitations Quiz

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