Blood MR signal suppression by preexcitation with inverting pulses.
A cardiac-gated sequence has been developed for functional cardiac imaging. It uses a nonselective 180 degrees preinverting pulse before a spin-echo (SE) readout sequence with an echo time (TE) of 28 msec. In seven healthy volunteers this sequence provided superior wall-to-chamber contrast in end diastole and end systole when compared with the following sequences: SE, TE = 28 msec; SE, TE = 28 msec with dephasing gradients; and SE, TE = 28 msec with presaturation bands.
Mayo
J R
JR
Vancouver General Hospital, BC, Canada.
Culham
J A
JA
MacKay
A L
AL
Aikins
D G
DG
D000328:Adult; D001769:Blood; D001783:Blood Flow Velocity; D006321:Heart / Q000502:physiology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009200:Myocardial Contraction