GI Tract Imaging

Question 1

In order of radiation dose lowest to highest arrange the following AXR, CXR, Barium enema, CT abdo/ pelvis.

Answer 1

CXR
AXR
Barium enema
CT Abdo pelvis

Question 2

How may large bowel obstruction present?

Answer 2

Distension (significant)
pain
Absolute constipation
(Faeculant vomiting may be late to present) a

Question 3

What sign is seen in sigmoid volvulus?

Answer 3

Coffee bean sign

Question 4

Why does thumb printing occur on a AXR?

Answer 4

Thickening of haustra due to oedema

Sign of thickened wall indicative of active inflammatory process occurring

Question 5

What contrast study might be used to visualise pyloric stenosis?

Answer 5

Barium meal

Question 6

What segment of the stomach would be visualised in L1 axial CT scan?

Answer 6

Pyloric antrum

Question 7

What level can you see the tail of the pancreas at on a ct scan?

Answer 7

L1

Question 8

At what CT level would you be able to see the testicular veins?

Answer 8

L3

Question 9

When is whirlpool (whirl) sign seen?

Answer 9

Malrotation (volvulus (mid gut or caecal) on a CT

Small bowel obstruction

Question 10

2 imaging methods for biliary tree?

Answer 10

ECRP
MRCP
(Magnetic resonance cholangiopancreatogram)

Question 11

Give 2 pros and 1 con of US.

Answer 11

Cheap compared to CT and MRI
Portable

Highly user dependant

Question 12

When is GI stenting often done in the context of?

Answer 12

Cancer - palliative care - allow them to eat