Liver Flashcards
How lobes in the liver and what are they
Rt
Lt
Caudate upper and smallest
Quadrate lower
What ligament divides the liver
Falciform ligament
When imaging a liver what do you look at to determine if T1 or T2
Look at spinal canal and see csf
Liver has dual blood supply
Portal vein - SMV and splenic = 75
Hepatic artery = 25
How many segments of the liver
8
Most common TE used in T2 liver
80-100ms
Why use higher TE on liver
Makes image darker, more sensitive and CSF brighter
Why do a sat pulse transverse on liver (above and below)
To minimize blood flow related artifacts
Why do MRI liver vs CT
More helical
Detects lesions better
Assess tumor viability post therapy
Why can a lesion change signal
Blood poll effect
Susceptibility effect
Most common are hemamgiomas and adenomas especially arterial phase to venous phase
What liver lesion enhances peripheral to centeral post contrast
Hemamgiomas
Liver cyst indications
Long T1 and 2
No post contrast enhancement
Liver mets indications
Most common site
Dark on T1 bright in T2
Bulls eye or target sign on T2
Halo sign on rim
Fatty liver chemical shift
In phase add signal summation of water and fat
Out of phase subtracts signal, water minus fat
Most important phase post contrast liver dynamically
Arterial phase
