Review 2 (done)

Which one of the following is (are) used to control the production of scattered radiation?

1. Collimators

2. Optimal kV

3. Use of grids

• (A) 1 only

• (B) 1 and 2 only

• (C) 2 and 3 only

• (D) 1, 2, and 3

With the patient in an erect 45-degree LPO and the CR directed 2 in. medial and 2 in. lateral to the upper outer border of the shoulder, which of the following will be visualized to best advantage?

• (A) Coronoid process free of superimposition

• (B) Coracoid process free of superimposition

• (C) Glenoid cavity in profile

• (D) Greater tubercle in profile

Brightness and contrast resolution in digital imaging can be influenced by

1. window level (WL)

2. window width (WW)

3. look-up table (LUT)

• (A) 1 only

• (B) 1 and 2 only

• (C) 2 and 3 only

• (D) 1, 2, and 3

Acceptable method(s) of minimizing motion unsharpness is (are)

1. suspended respiration

2. short exposure time

3. patient instruction

• (A) 1 only

• (B) 1 and 2 only

• (C) 1 and 3 only

• (D) 1, 2, and 3

According to the line-focus principle, an anode with a small angle provides

1. improved recorded detail

2. improved heat capacity

3. less heel effect

• (A) 1 and 2 only

• (B) 1 and 3 only

• (C) 2 and 3 only

• (D) 1, 2, and 3

Which of the following expresses the gonadal dose that, if received by every member of the population, would be expected to produce the same total genetic effect on that population as the actual doses received by each of the individuals?

• (A) Genetically significant dose

• (B) Somatically significant dose

• (C) Maximum permissible dose

• (D) Lethal dose

A patient with an upper respiratory tract infection is transported to the radiology department for a chest examination. Who should be masked?

1. Technologist

2. Transporter

3. Patient

• (A) 1 only

• (B) 1 and 2 only

• (C) 3 only

• (D) 1, 2, and 3

Which of the following waveforms has the lowest percentage voltage ripple?

• (A) Single-phase

• (B) Three-phase, six-pulse

• (C) Three-phase, 12-pulse

• (D) High-frequency

The reduction in x-ray photon intensity as the photon passes through a material

is termed:

• (A) anode heel effect

• (B) grid cut-off

• (C) attenuation

• (D) divergence

To demonstrate the glenoid fossa in profile, the patient is positioned

• (A) 45 degrees oblique, affected side up

• (B) 45 degrees oblique, affected side down

• (C) 25 degrees oblique, affected side up

• (D) 25 degrees oblique, affected side down