Patent ID: 7206628

Claim:
A method for improving vessel/tissue contrast in time-of-flight angiography with a magnetic resonance tomography measurement, comprising the steps of: emitting a sequence of radio frequency excitation pulses into an examination volume of a subject containing vessels and tissue, said radio frequency excitation pulses each having a flip angle and having respective temporal spacings in said sequence defined by a repetition time; emitting gradient pulses into said examination volume from gradient coils and obtaining magnetic resonance signals from said examination subject, as frequency domain signals, and entering said frequency domain signals into a k-matrix as measuring points, said k-matrix having a center; sampling said k-matrix by one of continuously increasing or decreasing respective distances of the measuring points from the center of the k-matrix, thereby obtaining a plurality of samples; generating a magnetic resonance image from said samples wherein said vessels and said tissue are shown with a vessel/tissue contrast; and during said sampling of said k-matrix, varying said repetition time to optimize said vessel/tissue contrast.