TY - JOUR
T1 - MR Angiography of the Portal Venous System
T2 - Techniques, Interpretation, and Clinical Applications
AU - Leyendecker, John R.
AU - Rivera, Eugene
AU - Washburn, W. Kenneth
AU - Johnson, Stephen P.
AU - Diffin, Daniel C.
AU - Eason, James D.
PY - 1997
Y1 - 1997
N2 - Magnetic resonance (MR) angiography is a noninvasive means of assessing the portal venous system that has potential advantages over currently used modalities. Time-of-flight and phase-contrast MR angiography are useful techniques that differ fundamentally in their means of data acquisition but are comparable in their ability to demonstrate normal anatomy as well as abnormalities of the portal venous system. Occasionally, artifacts caused by respiratory motion, implanted metallic devices or surgical clips, in-plane saturation, or areas of complex flow are seen at MR angiography of the portal venous system. However, most artifacts can easily be identified as such and either remedied or ignored. In addition, the suppression of signal from surrounding soft tissues may result in poor detection of parenchymal lesions. The utility of standard projection angiograms and source images can be increased through the use of intravenously administered contrast material and postprocessing techniques such as partial-volume maximum intensity projection reconstructions and shaded surface renderings. In addition to providing information on portal venous anatomy and portosystemic collateral vessels, MR angiography of the portal vein has clinical application in portal venous thrombosis and stenosis, liver transplantation, and the evaluation and planning of surgical and transjugular intrahepatic portosystemic shunts.
AB - Magnetic resonance (MR) angiography is a noninvasive means of assessing the portal venous system that has potential advantages over currently used modalities. Time-of-flight and phase-contrast MR angiography are useful techniques that differ fundamentally in their means of data acquisition but are comparable in their ability to demonstrate normal anatomy as well as abnormalities of the portal venous system. Occasionally, artifacts caused by respiratory motion, implanted metallic devices or surgical clips, in-plane saturation, or areas of complex flow are seen at MR angiography of the portal venous system. However, most artifacts can easily be identified as such and either remedied or ignored. In addition, the suppression of signal from surrounding soft tissues may result in poor detection of parenchymal lesions. The utility of standard projection angiograms and source images can be increased through the use of intravenously administered contrast material and postprocessing techniques such as partial-volume maximum intensity projection reconstructions and shaded surface renderings. In addition to providing information on portal venous anatomy and portosystemic collateral vessels, MR angiography of the portal vein has clinical application in portal venous thrombosis and stenosis, liver transplantation, and the evaluation and planning of surgical and transjugular intrahepatic portosystemic shunts.
KW - Hypertension, portal, 957.711
KW - Magnetic resonance (MR), vascular studies, 957.12942
KW - Portal vein, MR, 957.12942
KW - Shunts, portosystemic, 957.4539
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UR - http://www.scopus.com/inward/citedby.url?scp=0031261952&partnerID=8YFLogxK
U2 - 10.1148/radiographics.17.6.9397456
DO - 10.1148/radiographics.17.6.9397456
M3 - Article
C2 - 9397456
AN - SCOPUS:0031261952
SN - 0271-5333
VL - 17
SP - 1425
EP - 1443
JO - Radiographics
JF - Radiographics
IS - 6
ER -