Gadolinium enhanced three-dimensional magnetic resonance portography with subtraction.
The aim was to evaluate a subtraction technique for breath-hold gadolinium enhanced three-dimensional magnetic resonance portography (3D-MRP). 26 patients with gastric and/or duodenal varices related to portal hypertension were investigated by 3D-MRP with two phase acquisitions. A partial volume maximum intensity projection (MIP) image after subtracting selective arterial phase images from subsequent portal venous phase images (subtraction 3D-MRP) was compared with the partial volume MIP without subtraction (non-subtraction 3D-MRP) to assess visualization of the portal vein and its collaterals. Subtraction 3D-MRP depicted excellent visualization of the portal vein, although this was not significantly better than non-subtraction 3D-MRP. However, subtraction 3D-MRP gave superior visualization of portal collaterals, with effective suppression of arterial and renal signal intensities, compared with non-subtraction 3D-MRP (p<0.001).
Nishida
N
N
Osaka City University Medical School, Department of Radiology, Japan.
Sakai
G
G
Morimoto
A
A
Isota
M
M
Kaminou
T
T
Matsuoka
T
T
Nakamura
K
K
Yamada
R
R
D000328:Adult; D003097:Collateral Circulation; D003287:Contrast Media; D004932:Esophageal and Gastric Varices / Q000175:diagnosis*; D005682:Gadolinium; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D018810:Magnetic Resonance Angiography / Q000379:methods*; D008297:Male; D008875:Middle Aged; D011169:Portal Vein / Q000473:pathology; D011172:Portography / Q000379:methods
D003287:Contrast Media; D005682:Gadolinium