SM_168b: Imaging of GI Tract

Question 1

Describe basic CT imaging terminology

Answer 1

Basic CT imaging terminology

• Hyeprdense (bright): calcium, blood, solid tumor, contrast
• Hypodense (dark): simple fluid, solid, fat
• Enhancing (post contrast CT): solid tumor inflammation

Question 2

Describe basic ultrasound imaging terminology

Answer 2

Basic ultrasound imaging terminology

• Anechoic (black): simple fluid
• Hypoechoic (dark): not simple fluid or mass
• Echogenic (bright): calcium, air, tumor

Question 3

Rule for radiation exposure is ____

Answer 3

Rule for radiation exposure is ALARA

Question 4

____ studies best evaluate mucosa and motility of esophagus, stomach, duodenum, intestine, and colon

Answer 4

Barium studies studies best evaluate mucosa and motility of esophagus, stomach, duodenum, intestine, and colon

Question 5

Common indications for CT in imaging of GI tract are ____, ____, and ____

Answer 5

Common indications for CT in imaging of GI tract are bowel obstruction, inflammation, and tumor evaluation

• Use IV and oral contrast

Question 6

Liver imaging involves use of ____, ____, and ____

Answer 6

Liver imaging involves use of ultrasound, triphasic liver CT, and MRI liver exams

• MRI has best soft tissue characterization for evaluation of the hepatic parenchyma

Question 7

___ has best soft tissue characterization for evaluation of hepatic parenchyma

Answer 7

MRI has best soft tissue characterization for evaluation of hepatic parenchyma

Question 8

Gallbladder imaging is best accomplished with ____ followed by ____

Answer 8

Gallbladder imaging is best accomplished with ultrasound followed by MRI

Question 9

Pancreatic pathology is best evaluated by ____ and ____

Answer 9

Pancreatic pathology is best evaluated by triphasic CT and pancreas MRI

Question 10

____ can interfere with evaluation of pancreas on ultrasound exams

Answer 10

Bowel gas can interfere with evaluation of pancreas on ultrasound exams

Question 11

Hollow organs of the GI tract are ____, ____, ____, and ____

Answer 11

Hollow organs of the GI tract are esophagus, stomach, small intestine, and colon

Question 12

This is the ____

Answer 12

This is the esophagus

Question 13

Shown are the ____ and ____

Answer 13

Shown are the stomach and small bowel

Question 14

Shown are the ____ and ____

Answer 14

Shown are the duodenal bulb and small bowel

Question 15

Barium with serial X-rays is used primarily to assess ____

Answer 15

Barium with serial X-rays is used primarily to assess bowel motility

Question 16

Shown are the ____ and ____

Answer 16

Shown are the small bowel and colon

Question 17

Describe the anatomy

Answer 17

Anatomy

Question 18

Shown are the ____, ____, and ____

Answer 18

Shown are the stomach, jejunum, and ileum

Question 19

Describe the anatomy

Answer 19

Anatomy

Question 20

Describe the anatomy

Answer 20

Anatomy

Question 21

Describe the anatomy

Answer 21

Anatomy

Question 22

Describe the anatomy

Answer 22

Anatomy

Question 23

Describe the anatomy

Answer 23

Anatomy

Question 24

Colon is evaluated via a ____

Answer 24

Colon is evaluated via a barium enema

(X-rays, barium, air via rectal tube)

Question 25

Gallbladder is best evaluated by ____

Answer 25

Gallbladder is best evaluated by ultrasound

Question 26

Shown are a normal ____ and ____

Answer 26

Shown are a normal gallbladder and liver

Question 27

This is a normal ____

Answer 27

This is a normal liver

Question 28

Describe the anatomy

Answer 28

Anatomy

Question 29

Pancreas ultrasound often has limited visualization due to ____ and ____

Answer 29

Pancreas ultrasound often has limited visualization due to difficulty for sound waves to penetrate obese patients and overlying bowel gas from the stomach

• Often go onto CT or MRI

Question 30

This is the ____

Answer 30

This is the pancreas

Question 31

____ is the best study for bowel obstruction

Answer 31

CT abdomen / pelvis is the best study for bowel obstruction

Question 32

Describe the anatomy

Answer 32

Anatomy

Question 33

Describe the anatomy

Answer 33

Anatomy

Question 34

___ is the imaging modality for RUQ pain

Answer 34

Ultrasound is the imaging modality for RUQ pain

Question 35

____ is the imaging modality for suspected small-bowel obstruction

Answer 35

CT abdomen and pelvis with contrast is the imaging modality for suspected small-bowel obstruction