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Time-of-Flight MR Angiography of Portal System and Collaterals in Portal Hypertension Using a 2-DFT Fast Spoiled Gradient Recalled Steady-State Precession Technique
- Source :
- Acta Radiologica. 35:581-585
- Publication Year :
- 1994
- Publisher :
- SAGE Publications, 1994.
-
Abstract
- MR angiographic examinations were performed in 26 patients. Approximately 30 contiguous fast spoiled GRASS images (8.1/3.1/30°, TR/TE/flip angle) were acquired during single breath-holding for about 35 s, and then new images were reconstructed with maximum intensity projection technique. Spoiled GRASS images (40/12/40) of 2 to 3 slices were taken during breath-holding for about 13 s, and these processes were repeated to obtain about 30 individual images for conventional MR angiography. The new MR angiograms were compared quantitatively and qualitatively with conventional MR angiograms with arterial portography as the gold standard. The new MR angiograms could visualize blood vessels with smooth margins, and provided almost the same anatomic information about the portal vein and collateral vessels as the conventional MR angiograms. Contrast-to-noise ratios between the portal or hepatic vein and liver parenchyma were significantly higher with fast spoiled GRASS images. The new MR angiograms using fast spoiled GRASS images provided useful diagnostic mapping of the collateral venous pathways within a shorter examination time.
- Subjects :
- Adult
Male
medicine.medical_specialty
Steady state (electronics)
Portal vein
Flip angle
Hypertension, Portal
medicine
Humans
Radiology, Nuclear Medicine and imaging
cardiovascular diseases
Vein
Aged
medicine.diagnostic_test
Radiological and Ultrasound Technology
business.industry
Mr angiography
food and beverages
General Medicine
Middle Aged
medicine.disease
Portal System
medicine.anatomical_structure
Maximum intensity projection
Angiography
cardiovascular system
Portal hypertension
Female
Radiology
Nuclear medicine
business
Magnetic Resonance Angiography
Subjects
Details
- ISSN :
- 02841851
- Volume :
- 35
- Database :
- OpenAIRE
- Journal :
- Acta Radiologica
- Accession number :
- edsair.doi.dedup.....937935d3c94abb65c1eedc173f598601