Anzeige
Erschienen in:
01.08.2006 | Erratum
MRA of abdominal vessels: technical advances
Erschienen in: European Radiology | Ausgabe 8/2006
Einloggen, um Zugang zu erhaltenExcerpt
In Table 1 the explanation of the acronym FMD (fifth line) is incorrect. The correct definition is “fibromuscular dysplasia”. For better understanding, the corrected Table 1 is given below:
Table 1
Indications for abdominal magnetic resonance angiography (MRA)
|
Indication for abdominal angiography
|
Technical remarks
|
|---|---|
|
Aortic aneurysm
|
Due to slow flow in the aneurysm, time-resolved techniques may be beneficial.
|
|
Aortic dissection
|
Fast time-resolved technique with temporal resolution of less than 2 s recommended to evaluate re-entry site and flow dynamics in the true and false lumen.
|
|
Renal artery disease
|
High-spatial resolution required for fibromuscular dysplasia (FMD) and exact grading of renal artery stenosis.
|
|
Acute mesenteric ischemia
|
Emergency setting - no MRA indication.
|
|
Chronic mesenteric ischemia
|
High-spatial resolution required for detection and grading of segmental stenoses. Administration of bowel relaxant (e.g. scopolaminbutylbromide) recommended. Cardiac MRI valuable to assess non-occlusive causes of mesenteric ischemia. Dynamic contrast-enhanced volume-interpolated sequences (VIBE) scans helpful to assess hypo-perfusion of the bowel induced by caloric stimulation.
|
|
Preoperative evaluation of liver and kidney donors
|
Large field of view (FOV) required to detect aberrant renal artery origins, late phase for assessment of ureters recommended.
|
|
Postoperative surveillance of kidney and liver transplantations
|
Combined examination with T2w, T1w sequences pre- and post-contrast recommended to exclude non-vascular causes of transplant dysfunction. Time-resolved technique may be helpful to detect regional perfusion deficits.
|
|
Assessment of abdominal venous pathology and normal variants
|
Gd-BOPTA or MS-325 for better venous enhancement recommended. Due to the always weaker venous signal, thicker partitions should be chosen (1.5 mm).
|
|
Vascular assessment of renal, liver and pancreatic cancer preoperatively
|
VIBE recommended as they yield morphologic and partially angiographic information.
|