Multirate SPAMM tagging.
Many magnetic resonance tagging sequences rely on periodicity in order to produce a uniform tagging grid that covers the whole image plane. This, however, is not always desirable, since motion may be restricted to specific parts of the image, and also different motion characteristics may call for different tagging grid densities. In this paper, we present a combination of the spatial modulation of magnetization 1-1 method with selective excitation pulses that can be used in order to restrict the tagging grid only to regions of interest and produce tagging grid of different density in each region. The method is fast and easy to implement even on older or less expensive systems, since it does not require extensive gradient switching.
Ikonomidou
Vasiliki N
VN
Aristotle University of Thessaloniki, Department of Electrical and Computer Engineering, Telecommunications Division, 54124 Thessaloniki, Greece.
Sergiadis
George D
GD
D000465:Algorithms; D007089:Image Enhancement / Q000379:methods*; D019028:Magnetic Resonance Imaging, Cine / Q000295:instrumentation / Q000379:methods*; D009038:Motion; D019047:Phantoms, Imaging; D012815:Signal Processing, Computer-Assisted; D013113:Spin Labels
D013113:Spin Labels