Flashcards in GIGU Imaging Deck (42)
What does a KUB flat plate x-ray screen for?
Acute abdominal disease
What does an Acute Abdominal Series x-ray help to identify?
Air under diaphragm, obstruction and fracture
Appropriate situations to order an Acute Abdominal Series x-ray?
Abdominal pain, distention or absent bowel sounds
With an x-ray, how does air appear?
Why are KUBs and Acute Abdominal series x-rays good?
Quick and readily available
How does an ultrasound work and what appears white/black?
Sound waves reflected back from tissues due to density
- Solid structures appear white
- Fluid filled structures appear black
What is ultrasound good for imaging?
STONES - gallbladder
Why is ultrasound a good imaging choice?
Quick, readily available and NO RADIATION
- Safe for pregnant women and children
What limits ultrasound?
How will gallstones appear on an ultrasound?
White with an acoustic shadowing with them
List some disease that ultrasound is good for imaging?
What does a HIDA scan inject and what is it useful for?
Nuclear tagged material is taken up the liver and excreted into the bile
- Useful for patients that have persistent symptoms of gallstones with lack of evidence from an ultrasound
What can a HIDA scan evaluate?
Gallbladder FUNCTION and cystic duct patency
What are the disadvantages to a HIDA scan?
Takes time and cannot inject nuclear tagged material into pregnant women
What is something you could add to a HIDA scan?
What is the purpose of adding CCK to a HIDA scan?
Assesses gallbladder function by stimulating it to empty!
What percentage of gallbladder emptying is abnormal?
< 35-40% is abnormal
What are the disadvantages to CCK being added to a HIDA scan?
Takes time and causes extreme abdominal cramping
Purpose of a Fluoroscopy - Barium swallow?
Assess esophageal function AND anatomy
Disadvantages of a Fluoroscopy - Barium swallow?
High doses of radiation
- Multiple x-rays while swallowing a radiopaque fluid
What is a disease example that would need a Fluoroscopy - Barium swallow to identify?
Zenker's Diverticula - pouch in esophagus that causes dysphagia, halitosis, regurgitation and unintentional weight loss
What are the 2 types of CT contrast?
Oral and IV
What is oral contrast with a CT good for imaging?
Intraluminal assessment of intestines
- Masses, tumors, perforations, obstructions
What is IV contrast with a CT good for imaging?
- Aorta and renal arteries
What is CT WITH contrast good for imaging?
Advantages of CT WITH contrast?
Fast, noninvasive and does NOT require consent
Disadvantages of CT WITH contrast?
High doses of radiation and contrast could cause an allergic reaction (fish)
CT WITHOUT contrast is the test of choice for what?
What is an alternative choice for kidney stone testing for pregnant females?
Ultrasound of kidney and bladder