Imaging Flashcards

0
Q

List the common reasons for requesting a plain abdominal radiograph

A

Acute abdominal pain
Small/large bowel obstruction
Acute exacerbation of IBD
Renal colic

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1
Q

Describe the imagining investigations available to investigate the GI tract and abdominal viscera

A

Plain X-ray:
AXR - bowel gas patterns, soft tissue structures, bones
Erect CXR - perforation, air under diaphragm
Contrast X-ray - barium swallow, barium enema, barium meal, follow through, used to define hollow viscera
Abdominal ultrasound - use of sound waves to generate image, cheap, portable, no radiation
Abdominal CT - high dose radiation, use of IV/oral/rectal contrast
Abdominal MRI - no radiation, good spatial and contrast resolution
GI angiography

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3
Q

Explain the role of the erect CXR in assessment of the patient with acute abdominal pain

A

Perforation due to ulcer, tumour, obstruction, trauma etc –> air under diaphragm

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4
Q

Recognise the use of Magnetic Resonance Cholangio-Pancreatogram (MRCP)

A

Visualisation of biliary tree

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5
Q

Compare and contrast the appearance of small and large bowel on an abdominal radiograph and describe the classical images of bowel obstruction

A

Small bowel - central position, valvulae conniventes
Large bowel - peripheral position, haustra, faeces
Abnormal gas pattern:
Small bowel obstruction >3cm
Large bowelobstruction >6cm
Caucum (ileocaecal valve) >9cm
Abnormalities - stones, masses, calcification, artefact, foreign body

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