Introduction to Respiratory Radiology (Part 1)

Question 1

X-ray radiation as part of the electromagnetic spectrum?

Answer 1

Between UV and gamma rays.

X-ray is an ionising radiation

Higher frequency between UV

Question 2

Dose from a chest X-ray and a chest CT and the equivalent background radiation?

Answer 2

Chest x-ray - 0.02 mSv = 3 days

Background - 2.2 mSv/year

Chest CT - 10 mSv = 4.5 years

Security Scan - 20 nSv

Transatlantic flight - 0.05 mSv

Question 3

Parts of body that appear on a chest X-ray?

Answer 3

Air

Fat

Soft Tissue

Bone

Question 4

Name the regions numbered

Answer 4

1. Aorta
2. Pulmonary Artery
3. Left auricle
4. Left ventricle
5. Right atrium
6. Trachea
7. Hemidiaphragm
8. Stomach (Gastric air bubble)
9. Horizontal Fissure

Question 5

Identify and describe what is wrong

Answer 5

Situs inversus - heart and other organs of the body are transposed through the sagittal plane to lie on the opposite (left or right) side from the usual

Question 6

Lung zones?

Answer 6

Upper zone - above rib 2

Middle zone - between ribs 2 and 4

Lower zone - below rib 4

Question 7

Name the regions numbered

Answer 7

1. Oblique fissue
2. Horizontal fissure
3. Posterior costophrenic recess
4. Retrosternal space

Question 8

Silhouette sign and its importance?

Answer 8

When the outline of a structure cannot be seen - denotes disease (loss of sharpness)