Abdomen Radiology

Question 1

Normal air fluid level in small bowel

Answer 1

• Not more than 3 in erect film

- If more than 3 -> obstruction

Question 2

Sign of pneumoperitoneum in X-ray

Answer 2

> Supine

• Air between the liver and diaphragm
• Lucent liver sign
• Rigler’s sign (double wall sign)
• Falciform ligament sign
• Inverted V sign (outline of lateral unbilical ligament)
• Urachus sign (outline of middle umbilical ligament)

> Left lateral decubitus (Preferred - detect minimal air)
- Lying on left side, right side up

Question 3

When use non-contrast CT scan

Answer 3

• Only for CT brain

- Most other CT use contrast