Lecture 20: GI Radiology Flashcards

1
Q

What is the search strategy for image interpretation of the abdomen?

A
  • Solid organs: Liver, spleen, pancreas, adrenal glands, and kidney
  • Gallbladder/biliary system
  • Lymph node chains: hepatogastric lig, periportal region, mesentery
  • Stomach, duodenum, rest of small bowel, colon
  • Fat planes, abdominal wall, bones
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2
Q

In a T1-weighted vs T2-weighted MRI, how does fluid show up?

A

T1: fluid is dark

T2: fluid is bright (best for fluid)

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3
Q

Which structures on CT will show up best at level of T11?

A

Spleen, stomach, liver, aorta, IVC, inferior aspects of lung well defined

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4
Q

Which structures on CT will show up best at level of T12?

A
  • Pancreas, spleen, kidney (particularly left)
  • Gallbladder, portal triad
  • Bifurcation of celiac trunk, possibly SMA, left renal vein, aorta, IVC
  • View of small bowel, stomach
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5
Q

Identify this structure; seen best at what level?

A

Gastric fundus (stomach)

*Seen best at T11

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6
Q

Identify this structure; seen best at what level?

A
  • Gallbladder
  • Seen best at T12
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7
Q

Identify this structure; seen best at what level?

A
  • Colon
  • At T12
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8
Q

Which structures are seen at level of T12-L1?

A
  • Pancreas, spleen, kidneys (particularly left)
  • Gallbladder, portal triad, biliary tree
  • SMA, left renal vein, aorta, IVC
  • View of small bowel, left colon, duodenum
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9
Q

Identify this structure; seen best at which level?

A
  • SMA
  • T12-L1
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10
Q

Which strucutres are seen at level of L3-L4?

A
  • Right kidney
  • Gallbladder
  • View of small bowel, ascending/descending colon, 3rd part of duodenum
  • Abdominal and post-abdominal musculature well visulaized
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11
Q

Identify this structure; well visualized at what level?

A
  • Psoas Muscle
  • L3-L4
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12
Q

What is the modality of choice for diagnosing problems w/ the Biliary Tree?

A
  • Endoscopic retrograde cholangiopanreatography (ERCP)
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13
Q

What is the imaging modality of choice for visualizing the abdominal aortic vasculature?

A
  • Digital subtraction arteriography
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14
Q

What is the pathology seen here; causes?

A
  • Ascites (fluid accumulation in abdomen)
  • Liver cirrhosis, salt/water retention, heart failure, cancer
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15
Q

What is a mid-sagittal view in CT useful in identifying?

A

Useful in assessing the SMA and “Nutcracker” syndrome

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16
Q

What is SMA syndrome?

A
  • 3rd part of the duodenum is compressed between aorta and SMA
  • Results in partial or complete blockage of the duodenum
17
Q

What is Nutcracker Syndrome?

A
  • Compression of the left renal vein between the SMA and aorta
18
Q

What type of hernia is this?

A
  • Sliding hiatal hernia
  • Bulge of stomach through esophageal hiatus into thorax
19
Q

What type of hernia is showed here?

A
  • Paraesophageal hiatal hernia
20
Q

What pathology is seen here; common presenting sx’s?

A
  • Zenker’s Diverticulum
  • Diverticular formation in the esophageal wall adjacent to the inferior pharyngeal constrictor and cricopharyngeus muscle
  • Severe halitosis (bad breath)
21
Q

What pathology is seen here?

A
  • Ulcerative Colitis
  • Classic “lead pipe” apperance due to loss of the haustral marking throughout the colon
22
Q

What pathology is seen here; cause?

A
  • Cholithiasis (gall stones)
  • High concentrations of bilirubin in bile and/or inefficient emptying
23
Q

What is this pathology?

A
  • Shatzki Ring
  • Narrowing of esophagus caused by ring of mucosal tissue
24
Q
A