Streamlined flow in the portal vein: Demonstration with MR angiography

2002 ◽  
Vol 15 (5) ◽  
pp. 603-609 ◽  
Author(s):  
Beno�t P. Gallix ◽  
Caroline Reinhold ◽  
Michel Dauzat ◽  
Patrice M. Bret
Keyword(s):  
Portal Vein ◽  
Mr Angiography ◽  
Streamlined Flow

Cavernous transformation of the portal vein: three-dimensional dynamic contrast-enhanced MR angiography

2007 ◽  
Vol 33 (4) ◽  
pp. 463-468 ◽  
Author(s):  
Li Wang ◽  
Zhao-shen Li ◽  
Jian-ping Lu ◽  
Fei Wang ◽  
Qi Liu ◽  
...  
Keyword(s):  
Portal Vein ◽  
Mr Angiography ◽  
Three Dimensional ◽  
Dynamic Contrast Enhanced ◽  
Cavernous Transformation ◽  
Contrast Enhanced

Blood flow in the portal vein: velocity quantitation with phase-contrast MR angiography.

Radiology ◽  
1993 ◽  
Vol 187 (1) ◽  
pp. 253-256 ◽  
Author(s):  
G R Applegate ◽  
F L Thaete ◽  
S P Meyers ◽  
P L Davis ◽  
S L Talagala ◽  
...  
Keyword(s):  
Blood Flow ◽  
Portal Vein ◽  
Phase Contrast ◽  
Mr Angiography

Portal vein thrombosis: etiology, diagnostic strategy, therapy and management

VASA ◽  
2005 ◽  
Vol 34 (2) ◽  
pp. 81-92 ◽  
Author(s):  
Hidajat ◽  
Stobbe ◽  
Griesshaber ◽  
Schroder ◽  
Felix
Keyword(s):  
Portal Vein ◽  
Digital Subtraction Angiography ◽  
Portal Vein Thrombosis ◽  
Mr Angiography ◽  
Doppler Sonography ◽  
Digital Subtraction ◽  
Mechanical Recanalization ◽  
Vein Thrombosis ◽  
Contrast Enhanced ◽  
Local Fibrinolysis

Myeloproliferative disorder, liver cirrhosis with portal hypertension, deficiency of natural anticoagulant proteins, gene mutation and hepatocellular carcinoma are the most frequent causes of portal vein thrombosis (PVT). Higher accuracy of the diagnostic methods is the reason why today the cause of PVT can be found more frequently. With imaging methods, PVT with or without cavernous transformation can be diagnosed. Fresh thrombus can be undetected in sonography due to the low echogenity but can be recognized in color Doppler sonography, especially with contrast-enhancing agent. Contrast-enhanced 3D MR angiography allows a comparable accuracy in the detection of PVT as digital subtraction angiography. Therapeutical options of PVT consist of mechanical recanalization of the portal vein, local fibrinolysis with or without placement of transjugular intrahepatic portosystemic stent shunt (TIPS), combination of mechanical recanalization and local fibrinolysis, systemic thrombolytic therapy, anticoagulation alone and surgical thrombectomy. Once PVT is found in sonography, Doppler sonography may be performed in order to distinguish benign from malignant thrombus. If further information is needed, MR angiography or contrast enhanced CT is the next step. If these tests are unsatisfactory, digital subtraction angiography should be performed. Until the early nineties, shunt surgery was recommended in patients with PVT who bled despite endoscopic treatment. Today, in symptomatic noncavernomatous PVT, recanalization with local methods is recommended. Additional implantation of TIPS should be performed when the patient is cirrhotic. In recent PVT in non-cirrhotic patients anticoagulation alone is recommended. It is expected that in old PVT anticoagulation can prevent further extension of the thrombus.

Portal vein aneurysms with multiple associated findings

VASA ◽  
2010 ◽  
Vol 39 (4) ◽  
pp. 312-318 ◽  
Keyword(s):  
Portal Vein ◽  
Mr Angiography ◽  
Splenic Artery ◽  
Splenic Vein ◽  
Three Dimensional ◽  
Imaging Features ◽  
Main Portal Vein ◽  
Cavernous Transformation ◽  
Maximal Diameter ◽  
Contrast Enhanced

Background: This study was done to investigate imaging features of portal vein aneurysms (PVA) associated with multiple associated findings and discuss the value of three-dimensional multiphase contrast-enhanced MR angiography (3D DCE-MRA) in detecting PVA. Patients and methods: 3D DCE-MRA with comprehensive use of various post processing methods was performed in 10 PVA patients. Imaging features of these PVA were analyzed. Results: Of the 10 patients, PVA were located in the splenic vein in three cases, in the intrahepatic portal vein in three cases, at the confluence of the superior mesenteric vein and splenic vein in two cases, and in the main portal vein in two cases. The maximal diameter of the PVA varied from 2.0 cm to 8.39 cm (mean ± SD, 3.72 ± 1.84 cm). There were several cases associated with multiple associated findings, such as cavernous transformation of the portal vein, arterio-portal fistulas, arteriovenous malformation and multiple aneurysms of the splenic artery. Conclusions: 3D DCE-MRA proved to be effective in detecting PVA, improving the diagnosis of associated findings, and in supplying more information for clinical treatment of PVA.

Three-Dimensional Black Blood Mr Angiography of the Liver during Breath Holding

1994 ◽  
Vol 35 (2) ◽  
pp. 131-134 ◽  
Author(s):  
Y. Suto ◽  
Y. Ohuchi ◽  
T. Kimura ◽  
T. Shirakawa ◽  
N. Mizuuchi ◽  
...  
Keyword(s):  
Portal Vein ◽  
Mr Angiography ◽  
Respiratory Motion ◽  
Three Dimensional ◽  
Breath Holding ◽  
Black Blood ◽  
Gradient Echo ◽  
Left Main ◽  
Tof Mra ◽  
Transverse Portion

In 2-D time-of-flight MR angiography (2-D TOF MRA) of the liver, artifacts caused by respiratory motion are unavoidable. Therefore, a 3-D black blood MRA of the liver was attempted in 7 healthy volunteers, using a 3-D gradient echo sequence which allows imaging during breath holding. 2-D TOF MRA was performed as well. In all subjects, 3-D MRA allowed visualization of the trunk, 1st-, and 2nd-order branches of the portal vein without interruption. Right 3rd-order branches were visualized without interruption in 6 of 7 subjects (85%). However, with 2-D MRA, the transverse portion of the left main portal vein could not be visualized in any subject, and the periphery of the portal vein was less clear than with 3-D MRA.

scholarly journals 494. MR angiography of Portal vein using Minimum Intensity Projection

1991 ◽  
Vol 47 (8) ◽  
pp. 1524
Author(s):  
Tadahiro Takeda ◽  
Junichi Makita ◽  
Yoshiyuki Usui ◽  
Takehiko Goro
Keyword(s):  
Portal Vein ◽  
Mr Angiography ◽  
Minimum Intensity Projection ◽  
Minimum Intensity
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