Method and magnetic resonance system for determining a coding for a flow measurement and for implementing a flow measurement with the coding

A method for magnetic resonance flow measurement in a magnetic resonance system, comprising the steps of:

• in a magnetic resonance system, obtaining magnetic resonance angiography data from a volume within an examination subject;
• supplying said angiography measurement data to a processor and providing a user input to said processor and, in said processor, determining a vessel in said volume from said angiography measurement data, dependent on said user input;
• in said processor, automatically determining dimensions and an orientation of said vessel from said angiography measurement data;
• in said processor, automatically determining a slice for implementing a flow measurement therein dependent on said dimensions and said orientation of said vessel;
• in said processor, automatically determining a coding for said flow measurement by in a magnetic resonance system, implementing a flow pre-measurement using multiple, different codings within a slice within an examination subject in whom a flow measurement is to be conducted each of said codings allowing flow velocities to be detected with a sensitivity that is dependent on the respective coding, determining a distribution of flow velocity values within said slice from results of said flow pre-measurement, by Fourier transformation of said results, and determining a coding for said flow measurement from said distribution of said flow velocity values;
• and
• implementing said flow measurement in said slice using said coding with said magnetic resonance system.

A magnetic resonance system for determining a coding for a magnetic resonance flow measurement, comprising:

• a magnetic resonance data acquisition unit;
• a computerized control unit that operates aid magnetic resonance data acquisition unit to implement a flow pre-measurement using multiple, different codings within a slice within an examination subject in whom a flow measurement is to be conducted each of said codings allowing flow velocities to be detected with a sensitivity that is dependent on the respective coding;
• said control unit being configured to determine a distribution of flow velocity values within said slice from results of said flow pre-measurement, by Fourier transformation of said results;
• and
• said control unit being configured to determine a coding for said flow measurement from said distribution of said flow velocity values.

A magnetic resonance system for magnetic resonance flow measurement, comprising:

• a magnetic resonance data acquisition unit;
• a control unit that operates said magnetic resonance data acquisition unit to obtain magnetic resonance angiography data from a volume within an examination subject;
• said control unit having an input supplied with said angiography measurement data and a user input, and said control unit being configured to determine a vessel in said volume from said angiography measurement data, dependent on said user input;
• said control unit being configured to automatically determine dimensions and an orientation of said vessel from said angiography measurement data;
• said control unit being configured to automatically determine a slice for implementing a flow measurement therein dependent on said dimensions and said orientation of said vessel;
• said control unit being configured to determine a coding for said flow measurement by in a magnetic resonance system, implementing a flow pre-measurement using multiple, different codings within a slice within an examination subject in whom a flow measurement is to be conducted each of said codings allowing flow velocities to be detected with a sensitivity that is dependent on the respective coding, determine a distribution of flow velocity values within said slice from results of said flow pre-measurement, by Fourier transformation of said results, and determine a coding for said flow measurement from said distribution of said flow velocity values;
• and
• said control unit being configured to operate said magnetic resonance data acquisition unit to implement said flow measurement in said slice using said coding

A computer-readable medium encoded with programming instructions, said medium being loadable into a computerized control system of a magnetic resonance system and said programming instructions causing said control system to:

• operate said magnetic resonance system to implement a flow pre-measurement using multiple, different codings within a slice within an examination subject in whom a flow measurement is to be conducted each of said codings allowing flow velocities to be detected with a sensitivity that is dependent on the respective coding;
• determine a distribution of flow velocity values within said slice from results of said flow pre-measurement, by Fourier transformation of said results;
• and
• determine a coding for said flow measurement from said distribution of said flow velocity values.

A computer-readable medium encoded with programming instructions, said medium being loadable into a control system of a magnetic resonance system and said programming instructions causing said control system to:

• operate said magnetic resonance system to obtain magnetic resonance angiography data from a volume within an examination subject;
• receive said angiography measurement data and a user input, and determine a vessel in said volume from said angiography measurement data, dependent on said user input;
• determine dimensions and an orientation of said vessel from said angiography measurement data;
• determine a slice for implementing a flow measurement therein dependent on said dimensions and said orientation of said vessel;
• determine a coding for said flow measurement by in a magnetic resonance system, implementing a flow pre-measurement using multiple, different codings within a slice within an examination subject in whom a flow measurement is to be conducted each of said codings allowing flow velocities to be detected with a sensitivity that is dependent on the respective coding, determine a distribution of flow velocity values within said slice from results of said flow pre-measurement, by Fourier transformation of said results, and determine a coding for said flow measurement from said distribution of said flow velocity values;
• and
• operate said magnetic resonance system to implement said flow measurement in said slice using said coding.