Abstract：
:This paper describes several methods for magnetic resonance angiography that create projection images based solely on flowing blood. To both remove static tissue from the image and generate signals from blood, two classes of methods considered are temporal subtraction and cancelling excitation. Temporal subtraction, analogous to digital subtraction angiography with live and mask images, is performed via phase or magnitude differences in blood signals, while cancelling excitation is characterized by its removal of static structures by selectively exciting only flowing material. Means of projection imaging which incorporate these flow-sensitive methods include variations of thick-slice 2-D spin-wrap imaging, line-scan imaging, and volumetric imaging with time-varying gradients.
journal_name
IEEE Trans Med Imagingjournal_title
IEEE transactions on medical imagingauthors
Nishimura DG,Macovski A,Pauly JMdoi
10.1109/TMI.1986.4307763subject
Has Abstractpub_date
1986-01-01 00:00:00pages
140-51issue
3eissn
0278-0062issn
1558-254Xjournal_volume
5pub_type
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