Detection of biliary and vascular anatomy in living liver donors: value of gadobenate dimeglumine enhanced MR and MDCT angiography.
OBJECTIVE
To evaluate the performance of magnetic resonance (MR) and multidetector computed tomography (MDCT) in the assessment of living donor's vascular and biliary anatomy, having surgical findings as reference standard.


METHODS
Thirty-two living liver donors underwent MR cholangiography (1.5-T; standard cholangiography pulse sequences and delayed acquisitions after administration of biliary contrast agent) for biliary anatomy evaluation. MDCT (16-row multidetector scanner, multiphase protocol, 3mm slice thickness) was also performed in all cases for the assessment of vascular anatomy before transplantation. Hepatic veins (<4mm in diameter) were not considered. MR and MDCT images interpretation was performed by two reviewers by consensus, based on source axial images, multiplanar reformats, and three-dimensional (3D) postprocessing images. Surgical intraoperative findings were used as standard of reference.


RESULTS
At surgery, 17 biliary anomalies, 3 portal anomalies, 32 venous and 8 arterial variants were found in the 32 patients. MR correctly identified 15/17 biliary anomalies, with a sensitivity of 88% and a specificity of 93%. MDCT correctly identified 8/8 arterial, 3/3 portal and 29/32 venous variants, with a sensitivity of 100% and 91%, respectively, and a specificity of 100%.


CONCLUSIONS
MR and MDCT proved to be efficient in evaluating living liver donor's biliary and vascular anatomy.
Artioli
Diana
D
Ospedale Niguarda Ca' Granda, Piazza Ospedale Maggiore 3, Milano, Italy. diansadiana@gmail.com
Tagliabue
Marianna
M
Aseni
Paolo
P
Sironi
Sandro
S
Vanzulli
Angelo
A
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000792:Angiography / Q000379:methods; D001659:Biliary Tract / Q000002:abnormalities* / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D002758:Cholangiography / Q000379:methods; D003287:Contrast Media; D005260:Female; D019786:Gadolinium DTPA; D006499:Hepatic Artery / Q000002:abnormalities* / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D016031:Liver Transplantation / Q000000981:diagnostic imaging* / Q000379:methods / Q000473:pathology*; D019520:Living Donors; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D014057:Tomography, X-Ray Computed / Q000379:methods*
D003287:Contrast Media; D019786:Gadolinium DTPA