MRI cardiac tagging using a sinc-modulated RF pulse train.
A method of spatial modulation of magnetization using the RF pulse train is described for improved cardiac tagging. The method is based on a sinc-modulated RF pulse train in the presence of constant gradient. Such an RF pulse train yields a rectangular profile of saturated magnetization, and the bandwidth of the sinc envelope controls the width of the saturation tag. Compared to DANTE and SPAMM tagging techniques, this method offers sharper-edged tags and the ability to change the ratio of tag width to tag separation. The approach was implemented on a 9.4 T vertical bore NMR system and demonstrated with both phantom and in vivo mouse heart studies.
Wu
Ed X
EX
Department of Radiology, College of Physicians and Surgeons, Columbia University, New York, New York, USA. xew1@columbia.edu
Towe
Christopher W
CW
Tang
Haiying
H
D000818:Animals; D006321:Heart / Q000033:anatomy & histology / Q000502:physiology*; D007089:Image Enhancement; D008279:Magnetic Resonance Imaging / Q000379:methods*; D051379:Mice; D008810:Mice, Inbred C57BL; D019047:Phantoms, Imaging