6533b826fe1ef96bd1283a5f
RESEARCH PRODUCT
Abdominal and Thoracic Magnetic Resonance Angiography: Challenges, Technical Approaches, and First Clinical Applications
Wolfhard SemmlerR. HausmannHans-ulrich Kauczorsubject
Thoraxmedicine.diagnostic_testComputer sciencemedia_common.quotation_subjectMagnetic resonance imagingInferior vena cavaMagnetic resonance angiographymedicine.anatomical_structuremedicine.veinmedicineSpin echoContrast (vision)AbdomenGradient echoBiomedical engineeringmedia_commondescription
The main goal of magnetic resonance angiography (MRA) is to enrich the huge potential of magnetic resonance imaging (MRI) by additional morphological and functional information about the vasculature. In spin echo sequences fast flowing blood leads to signal extinction, providing high contrast between tissue and vascular structures without the need for contrast media. However, various artifacts are frequently observed which alter the assessment of the vasculature. They are due to alterations of flow (slow velocity or turbulences) or induced by the acquisition technique (Mills et al. 1983; Bradley and Waluch 1985). By using gradient echo sequences, high-quality angiograms can be obtained from the intracerebral vessels or the carotid arteries. The application of MRA in the abdomen and thorax faces a lot of difficulties caused by respiratory motion, pulsation, and, to a minor degree, by susceptibility artifacts. These can be overcome by the application of optimized sequences and protocols designed for individual requirements.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-01-01 |