Radiography Exam Radiography 4

Question 1

Which radiation protection principle involves limiting exposure to only what is needed for diagnosis?

Accepted Answer

ALARA

Answer

ALARA (As Low As Reasonably Achievable) is the guiding principle of radiation protection that mandates minimizing patient and occupational dose.

Question 2

On a PA chest radiograph, the carina should normally be located at which vertebral level?

Accepted Answer

T4-T5

Answer

The carina (tracheal bifurcation) is normally located at the level of T4-T5 on a PA chest radiograph.

Question 3

What type of film/screen combination is used to reduce patient dose while maintaining image quality?

Accepted Answer

Fast-speed, rare earth screens

Answer

Rare earth fast-speed screens require less radiation to produce adequate density, significantly reducing patient dose compared to calcium tungstate systems.

Question 4

Which positioning error causes the trachea to appear shifted to the left on a PA chest radiograph?

Accepted Answer

Patient rotated with right side closer to detector

Answer

When the patient is rotated with the right side closer to the detector, the right sternoclavicular joint appears larger and the trachea can appear shifted to the left.

Question 5

The term 'OID' in radiography stands for what?

Accepted Answer

Object-Image Distance

Answer

OID (Object-Image Distance) is the distance between the object being radiographed and the image receptor, which affects magnification and recorded detail.

Radiography Exam Practice Test

Radiography Exam Practice Test

Radiography Exam Radiography 4