caa a22 4500 469117575 CHVBK 20180323133129.0 cr unu---uuuuu 170328e19920201xx s 000 0 eng 10.1007/BF02733901 doi (NATIONALLICENCE)springer-10.1007/BF02733901 Selective Magnetic Resonance Angiography of the Head [Elektronische Daten] [Heinrich Mattle, Klaus Wentz] Selective magnetic resonance angiography ( MRA) is a combination of two- or three-dimensional MRA with radiofrequency presaturation pulses. Presaturation pulses can be applied over user-defined regions. They reduce or eliminate signals within the presaturation slab. As a result, blood flowing within or through the presaturation slab turns dark whereas blood flowing outside and not through the presaturation slab still appears bright. Using this technique, flow direction and origin of flow can be determined and flowing blood can be differentiated from stationary bright tissues such as thrombus. Arteries and veins can be imaged selectively due to their usually opposite flow direction. The intracranial collateral circulation about the circle of Willis can be shown, and vessels feeding or draining arteriovenous malformations can be identified more accurately. In conclusion, selective MRA can provide functional information about the cerebrovascular system, which cannot be obtained from conventional MR imaging (MRI) or MRA alone. Springer-Verlag New York Inc., 1992 Magnetic resonance angiography nationallicence Arteriography nationallicence Venography nationallicence Cerebral blood vessels nationallicence Thrombosis nationallicence Mattle Heinrich Department of Neurology, Inselspital, Bern, Switzerland aut Wentz Klaus Department of Radiology. Klinikum Mannheim, University of Heidelberg, Federal Republic of Germany aut Cardiovascular and Interventional Radiology Springer-Verlag 15/1(1992-02-01), 65-70 0174-1551 15:1<65 1992 15 270 https://doi.org/10.1007/BF02733901 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02733901 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mattle Heinrich Department of Neurology, Inselspital, Bern, Switzerland aut NATIONALLICENCE 700 1- Wentz Klaus Department of Radiology. Klinikum Mannheim, University of Heidelberg, Federal Republic of Germany aut NATIONALLICENCE 773 0- Cardiovascular and Interventional Radiology Springer-Verlag 15/1(1992-02-01), 65-70 0174-1551 15:1<65 1992 15 270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer