Chapter 20: Review of Thoracic Imaging

Chapter 20: Review of Thoracic Imaging

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

1. What lung problem is ventilation/perfusion () scanning used to detect?

ANS:  B

Ventilation/perfusion scanning (also known as  scanning) is often used in evaluating for pulmonary embolism.

DIF:    Recall             REF:   p. 452            OBJ:   7

2. Which of the following structures will result in the most radiopaque shadow on the chest radiograph?

ANS:  D

Bone absorbs a large amount of the x-ray beam and is seen as a nearly white (radiopaque) shadow.

DIF:    Recall             REF:   p. 453            OBJ:   2

3. The right heart shadow is NOT visible on the chest radiograph. Which of the following pathologies may explain this?

ANS:  A

The structures visible on a chest radiograph are seen only when tissue of one density is next to tissue of another density. For example, the heart is visible as a soft tissue density in the middle of the chest because the lungs, which are primarily air density, normally surround it. If the chest on either side of the heart were filled with water (pulmonary consolidation or pleural effusion) the normal heart shadow would not be visible on the radiograph.

DIF:    Recall             REF:   p. 453            OBJ:   5

4. In which of the following situations is obtaining a chest radiograph least useful?

ANS:  C

The respiratory therapist needs to be familiar with the common clinical indications for obtaining a chest radiograph (Table 20-1).

DIF:    Recall             REF:   p. 466            OBJ:   1

5. In what pulmonary condition does the chest radiograph often “lag behind” the clinical status of the patient?

ANS:  C

The chest radiograph often lags behind the clinical condition of the patient. This is common in pneumonia where the patient may come in with high fever and cough typical for pneumonia but an infiltrate on the chest film may not appear for 12 to 24 hours.

DIF:    Recall             REF:   p. 454            OBJ:   3