Radiography Exam Radiography 2

Question 1

Which Bucky factor is typically used when the grid ratio is 12:1?

Accepted Answer

5-6

Answer

A 12:1 grid ratio has a Bucky factor of approximately 5-6, meaning exposure must be increased by that factor to compensate for absorbed scatter.

Question 2

What is the primary purpose of the anode heel effect in radiography?

Accepted Answer

Allow positioning of thicker anatomy under the cathode end

Answer

The anode heel effect causes lower intensity at the anode end, so thicker anatomy should be placed under the cathode end where intensity is higher.

Question 3

A patient receives 200 mR at 100 cm SID. What is the approximate dose at 200 cm SID?

Accepted Answer

50 mR

Answer

Using the inverse square law, doubling the distance quarters the intensity: 200 × (100/200)² = 50 mR.

Question 4

Which type of ionizing radiation has the greatest penetrating power?

Accepted Answer

Gamma rays

Answer

Gamma rays have the greatest penetrating power among the common forms of ionizing radiation used in medical imaging contexts.

Question 5

What does the term 'penumbra' refer to in radiographic imaging?

Accepted Answer

Geometric unsharpness at the edge of a shadow

Answer

Penumbra refers to the zone of geometric unsharpness or partial shadow at the edge of a radiographic image caused by the finite size of the focal spot.

Radiography Exam Practice Test

Radiography Exam Practice Test

Radiography Exam Radiography 2