Vessel-dependent flip angle modulation in tof mr angiography
AssigneeSiemens Aktiengesellschaft
InventorHans-Peter Fautz
Life of this patent
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Abstract
In a method to excite a magnetization in the generation of MR angiography images with the TOF technique, a slice plane is determined in which the magnetization for the generation of the MR angiography images should be excited, a position of a vessel in the slice plane is determined, and the magnetization is excited in the slice plane such that the magnetization in the vessel has a flip angle gradient in the direction of the vessel.
Claims10
A method to excite a magnetization for generation of time-of-flight (TOF) magnetic resonance (MR) angiography images, said method comprising the steps of:
- determining a slice plane in an examination subject in which magnetization is to be excited for generation of TOF MR angiography images;
- determine a position of a vessel in said slice plane, said vessel having a vessel direction;
- and
- operating a magnetic resonance system to excite magnetization in said slice plane to give magnetization in said vessel a flip angle gradient in said vessel direction.
A magnetic resonance system to excite a magnetization for generation of time-of-flight (TOF) magnetic resonance (MR) angiography images, comprising the steps of:
- an MR data acquisition unit;
- a processor having an input allowing entry of a designation of a slice plane in an examination subject in which magnetization is to be excited for generation of TOF MR angiography images;
- said processor being configured to determine a position of a vessel in said slice plane, said vessel having a vessel direction;
- and
- said processor being configured to operate said MR data acquisition unit to excite magnetization in said slice plane to give magnetization in said vessel a flip angle gradient in said vessel direction to acquire MR data.
Dependencies are inferred from the claim text.