Abdomen radiology Flashcards Preview

MD Olivia Radiology > Abdomen radiology > Flashcards

Flashcards in Abdomen radiology Deck (13)
Loading flashcards...
1
Q

what can cause large bowel obstruction?

A

cancer, strictures from previous surgery etc

2
Q

what is rigger’s sign?

A

well defined double wall of the bowel- indicates that air is surrounding both sides of the bowel wall

3
Q

what do we call air under the diaphragm,?

A

pneumoperitoneum

4
Q

what is the maximum diameter of small bowel, large bowel and caecum?

A

3 cm, 6cm and 9cm respectively

5
Q

why would we worry about air under the diaphragm?

A

indicates bowel perforation or post surgical

6
Q

what are some complications of diverticular disease?

A
  • Perforation
  • abscess formation
  • strictures
7
Q

what is the difference between diverticulosis and diverticulitis?

A
diverticulosis= many diverticulum
Diverticulitis= inflammation
8
Q

what are some causes of small bowel obstruction?

A

adhesions, IBD- strictures, tumour, lymphoma, incarcerated hernias etc

9
Q

what are the 3 signs of cholecystitis on U/S?

A
  1. Ultrasound + murphy’s sign (press on gallbladder)
    
2. gall bladder wall thickening >3mm

  2. pericholecystic fluid
10
Q

what might you think if you saw a diffusely hyper echoic liver on U/S? as well has a hyper dense liver on CT?

A

fatty liver

11
Q

what is the difference between bacterial abscess and amoeba abscess on CT liver?

A

bacterial abscess appears more multifocal than an amoebic abscess that appears more uninocular and homogenous

12
Q

what phase do you see HCC best in on CT?

A

arterial phase

13
Q

how do you tell the difference of SBO and LBO on X-rays?

A

plicae circularis for SBO and haustra for LBO. Hausfrau lines do not go all the way through