Gastroenterology
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| Radiography common uses | show 🗑
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| show | dilated bowel (SB > 3 cm, LB > 6 cm, cecum > 9 cm); poss free air; may also be post-op ileus
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| US uses | show 🗑
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| show | dark (anechoic); bright tissue interfaces (GB wall)
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| US: Cholecystitis findings | show 🗑
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| show | motility disorders, structure abnormalities (hiatal hernia)
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| show | Celiac sprue, Crohn disease, Midgut volvulus (children)
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| Fluoroscopy uses: Colon | show 🗑
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| Fluoroscopy uses: Congenital structural abnormalities | show 🗑
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| show | single contrast (barium alone) or double (barium & air)
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| CT uses: Abdominal pain | show 🗑
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| CT other uses: | show 🗑
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| show | HCC, varicosities, portal hypertension
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| CT uses: Complications of pancreatitis | show 🗑
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| show | Focal nodular hyperplasia, hepatic adenoma, HCC, hemochromatosis, hemosiderosis
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| show | Pseudocyst, mucinous or serous neoplasms, intraductal papillary mucinous neoplasms
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| MRI uses: Biliary tract pathology | show 🗑
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| Nuclear med: uses: Biliary imaging | show 🗑
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| show | Diverticulosis, malignancy, anticoagulation
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| show | If cystic duct is patent: GB accumulates radioactivity; if CBD is patent: sm bowel will accumulate radioactivity
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| Tc-99 tagged RBC scan | show 🗑
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| show | fat or tissue stranding
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| show | s/b no bigger than 6 mm diameter
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| show | Abd US (shows biliary duct dilatation). CT (TOC: mass & ductal dilatation). ERCP if CT neg (double duct sx of CBD & panc duct). Lap for staging.
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| For resectable pancreatic tumors, aspiration bx is: | show 🗑
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| Acute pancreatitis on KUB/CXR | show 🗑
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| If suspect pancreatic necrosis (in pancreatitis), choose this test | show 🗑
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| Acute panc: Abd US (purpose) | show 🗑
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| show | to detect necrosis, stones/ductal disruption
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| Role of endoscopic US in pancreatitis | show 🗑
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| show | SBO
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| Apple core lesion = | show 🗑
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| show | gallstones & dilated common bile duct
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| Classic imaging modality for free air | show 🗑
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| show | calcifications; foreign bodies; free air; obstruction
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| show | fluoroscopy (used to assess transit times and mucosal abnormalities) (no longer for : CRC screening or reflux)
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| show | EUS (if not available: CT; may also do MRI/ERCP)
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| show | EUS (also used for aspirational bx)
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| show | Video capsule endoscopy (VCE)
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| show | avoid in patients with GI distress, fistulas, pregnancy or swallowing disorders
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| show | often TOC in liver, biliary dz; TOC in pediatric appendicitis
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| show | EGD; ERCP; EUS (has interventional use)
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| CT/MRI | show 🗑
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| show | req bowel prep, rectal tube; low sens/spec; MRI cannot detect lesion <5 mm
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| show | X-ray: dilated loops with edema (thumbprinting). Angiography. CT may show aortic dissection, bowel distention/edema, arterial calcification
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| CXR with barium is no longer used for: | show 🗑
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| show | CT (>7 mm & >2mm thick = appy)
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| show | US
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| show | US best; plain films only 15%; CT; HIDA (dye)
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| Acute pancreatitis: plain films | show 🗑
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| show | US: enlarged hypoechoic pancreas; CT: enlarged panc, peripancreatic edema
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| show | CT
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| show | Pancreatic calcifications (classic finding)
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| Chronic pancreatitis findings on CT | show 🗑
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| show | Chain of lakes (areas of dilation / stenosis along pancreatic duct)
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| Pancreatic cancer: dx modalities | show 🗑
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| show | CXR (air fluid level in enlarged fluid filled esoph); Barium esophagography (birds beak: smooth symmetric tapering; esophageal dilatation; loss of peristalsis); upper endoscopy
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| Diffuse esophageal spasm: findings on Barium Esophagography | show 🗑
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| show | intermittent simultaneous contraction
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| Achalasia: dx gold standard = | show 🗑
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| Gastric cancer: imaging | show 🗑
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| show | EUS (if not avail: CT) (may also do MRI/ERCP)
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| Study of choice: staging of rectal, esophageal and gastric tumors and identification of pancreatic tumors: | show 🗑
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| Trans-abdominal US is often test of choice in: | show 🗑
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| Esophageal ca on CXR | show 🗑
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| show | esophageal ca adiography: GI indications:
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| SBO on xray | show 🗑
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| US uses | show 🗑
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| Normal GB on US | show 🗑
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| show | Wall thickening, pericholecystic fluid, sonographic Murphy’s sign
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| show | Appendicitis, diverticulitis, bowel obstruction, cholecystitis, biliary tract obstruction
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| CT uses: Complications of cirrhosis | show 🗑
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| CT uses: Complications of pancreatitis | show 🗑
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| MRI uses: Liver lesion characterization | show 🗑
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| MRI uses: Pancreatic cystic lesion characterization | show 🗑
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| MRI uses: Biliary tract pathology | show 🗑
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| Nuclear med: uses: Biliary imaging | show 🗑
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| show | Diverticulosis, malignancy, anticoagulation
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| show | If cystic duct is patent: GB accumulates radioactivity; if CBD is patent: sm bowel will accumulate radioactivity
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| Tc-99 tagged RBC scan | show 🗑
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| Diverticulosis/diverticulitis: sx of inflammation on imaging | show 🗑
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| show | 6 mm diameter
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| US: useful in biliary dz to: | show 🗑
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| show | US; sensitivity > 95% for stones > 2mm (less sensitive for stones in CBD); GS best seen after 8hrs of fast; Stones seen as echogenic, mobile objects with acoustic shadow
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| show | sigmoid volvulus
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| PUD perforation: diagnostic imaging | show 🗑
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| IBS Imaging/Invasive Testing (by age groups) | show 🗑
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| IBD imaging | show 🗑
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Created by:
Abarnard
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