METHOD TO GENERATE AN RF EXCITATION PULSE TO EXCITE AN ARBITRARILY SHAPED VOLUME, METHOD FOR TARGETED EXCITATION OF SPINS WITHIN A VESSEL, AND METHOD TO CREATE MR ANGIOGRAPHY IMAGES, AND MAGNETIC RESONANCE SYSTEM
In order to generate an RF excitation pulse together with a gradient curve to excite nuclear spins an arbitrarily shaped volume with a magnetic resonance system, a volume segment is prepared in which the volume is situated, such that only spins within the volume yield an MR signal portion in the subsequent detection of an MR signal. An MR signal is detected from the volume segment along a trajectory of k-space. At least one gradient for scanning k-space along the trajectory is switched during the detection. The RF excitation pulse is generated corresponding to the MR signal detected in a temporally inverted manner, and the gradient curve is generated corresponding to the temporally inverted curve of the at least one gradient to scan k-space.
