168b - Imaging of the GI System Flashcards

1
Q

What are the indications for an “abdominal series”?

A

Free air or bowel obstruction

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2
Q

Which imaging modality is recommended to assess bowel motility?

A

Barium + serial x rays until barium reaches the cecum

(Fluoro for bowel motility, esophagram for esophagus)

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3
Q

What is the recommendation around CTs for pregnant women?

A

Avoid ionizing radiation in pregnant women (esp first trimester) if possible

Consider US or MRI over CT

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4
Q

Why not use ultrasound to evaluate the pancreas?

A

Bowel gas makes it difficult to seee

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5
Q

What is the best imaging modality for the gallbladder?

A

Ultrasound

Best for seeing gallstones, cholecystitis, biliary dilation

(followed by MR if necessary to see stones in the distal bile duct or malignancy)

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6
Q

Which imaging modality is best for evaluating hepatic parenchyma?

A

MRI

  • But only used after increased suspicion after ultrasound or CT
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7
Q

Which imaging modality is recommended to evaluate bowel obsruction, perforation, inflammation, tumor, or abscess?

A

CT abdomen/pelvis with IV and oral contrast

(For anything with motility, use barium study)

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8
Q

Which imaging modality is best for the pancreas?

A

Triphasic CT or pancreas MRI

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