Selective detection of ordered sodium signals by a jump-and-return pulse sequence.
A simple pulse sequence, derived from the shaped pulse optimally exciting the central transition of a spin 3/2, can be used to selectively detect ordered sodium with a given quadrupolar coupling. The pulse sequence consists of two pulses with opposite phases and separated by a delay, called a quadrupolar jump-and-return (QJR) sequence. This QJR sequence is tested with a phantom made of sodium ions in bacteriophage and in aqueous solution and its feasibility for contrast modification based on the quadrupolar coupling is demonstrated.
Lee
Jae-Seung
JS
Department of Chemistry, New York University, New York, NY 10003, USA.
Regatte
Ravinder R
RR
Jerschow
Alexej
A
D000465:Algorithms; D025561:Bacteriophage Pf1 / Q000737:chemistry; D008279:Magnetic Resonance Imaging / Q000379:methods; D019047:Phantoms, Imaging; D012964:Sodium / Q000737:chemistry*; D012965:Sodium Chloride; D012975:Sodium Isotopes; D012996:Solutions; D013113:Spin Labels
D012975:Sodium Isotopes; D012996:Solutions; D013113:Spin Labels; D012965:Sodium Chloride; D012964:Sodium