Radiography Exam Radiology Tech 5

Question 1

Which anatomical landmark is used to position for a posteroanterior (PA) chest radiograph?

Accepted Answer

Vertebra prominens (C7)

Answer

The vertebra prominens (C7) is palpated to confirm proper centering for PA chest projections, with the IR centered at T7.

Question 2

What is 'beam restriction' and why is it important in radiographic practice?

Accepted Answer

Limiting the X-ray field size; reduces patient dose and scatter

Answer

Beam restriction (collimation) limits the field of radiation to the area being imaged, reducing patient dose and scatter radiation that degrades image quality.

Question 3

Which X-ray interaction results in the complete absorption of the photon by an inner-shell electron?

Accepted Answer

Photoelectric effect

Answer

In the photoelectric effect, an X-ray photon is completely absorbed by an inner-shell electron, which is then ejected from the atom.

Question 4

What is the recommended source-to-image distance (SID) for routine chest radiography?

Accepted Answer

72 inches (183 cm)

Answer

A 72-inch (183 cm) SID is standard for PA chest radiography to minimize magnification of the heart and improve image sharpness.

Question 5

Which of the following describes 'radiographic density' (optical density) on a conventional film?

Accepted Answer

The overall blackness or darkness of the radiographic image

Answer

Radiographic density (optical density) refers to the degree of overall blackening of the film, primarily controlled by mAs.

Radiography Exam Practice Test

Radiography Exam Practice Test

Radiography Exam Radiology Tech 5