What is three phase ct scan? Arterial phase, portal phase and Venus phase.

 

What is a three phase CT scan?

  Triple phase CT including an arterial phase, portal phase and Venus phase.

 

Why should do three phase scan?

Triple phase scan is mostly take for liver and biliary system.

Arterial:-  15-18 sec after bolus tracking

   Retoperitonial haemorrhage, in case of  removal of GB (gallbladder) in between liver and pancreas there is some infection spade, rupture of common hepatic artery (helium reason) may be rupture or narrowing. This are Post operative change’s, Aortic  obstruction

 

Portal phase (hepatic phase) biliary track:-  35-45 sec after bolus tracking

Portal phase for biliary tree

   Portal obstruction, liver crosses, hepatic ca metastatic change’s, cholanigo CA, Hepatic cyst, differencate between hepatic leassions.

 

Venus phase:-  90 sec after bolus tracking

Leassions, upper abdomen thrombosis, portal obstruction, renal mass, adenoma.