Method for spatially resolved determination of an mr parameter

A magnetic resonance system comprising:

• a magnetic resonance data acquisition unit;
• a computerized control unit that operates said magnetic resonance data acquisition unit, said computerized control unit being configured to operate said magnetic resonance data acquisition unit to generate a first complex image data set acquired from an imaged volume of an examination subject with an echo imaging sequence during a first echo time, said first complex image data set comprising at least one first image data set acquired with a first acquisition coil of said data acquisition unit and a second image data set acquired with a second acquisition coil of said data acquisition unit;
• providing a second complex image data set to said processor that were acquired from said imaged volume of said examination subject with said echo imaging sequence during a second echo time, said second complex image data set comprising at least one third image data set acquired with said first acquisition coil and a fourth image data set acquired with said second acquisition coil;
• said first, second, third and fourth image data sets each comprising complex image points that respectively correspond with each other from data set-to-data set with respect to said image volume of the examination subject;
• a processor supplied with said first and second complex image data sets, said processor being configured to, determine a magnetic resonance parameter for at least a portion of said image points of said first, second, third and fourth image data sets by determining, for each of said image points, a first image point vector for said first echo time from said first complex image data set that comprises corresponding image points of said first image data set and said second image data set, and determining a second image point vector for said second echo time from said second complex image data, that comprises corresponding image points of said third image data set and said fourth image data set, and combining said first and second image point vectors to produce a vector combination for which echo time-independent phase portions or echo time-independent magnitude portions in the first and second complex image data set are at least partially compensated, and to determine for each image point, at least one magnetic resonance parameter from said vector combination;
• and
• said processor being configured to make the respective magnetic resonance parameters for the respective image points available at an output of said processor in a form for use in reconstructing an image from said image points.

A non-transitory, computer-readable storage medium encoded with programming instructions, said storage medium being loaded into a computerized control and evaluation system of a magnetic resonance imaging system that also includes a magnetic resonance data acquisition unit, said programming instructions causing said computerized control and evaluation system to:

• operate said data acquisition unit to generate a first complex image data set acquired from an imaged volume of an examination subject with an echo imaging sequence during a first echo time, said first complex image data set comprising at least one first image data set acquired with a first acquisition coil of the data acquisition unit, and to generate a second image data set acquired with a second acquisition coil of said data acquisition unit;
• operate said data acquisition unit to generate a second complex image data set acquired from said imaged volume of said examination subject with said echo imaging sequence during a second echo time, said second complex image data set comprising at least one third image data set acquired with said first acquisition coil and a fourth image data set acquired with said second acquisition coil;
• said first, second, third and fourth image data sets each comprising complex image points that respectively correspond with each other from data set-to-data set with respect to said image volume of the examination subject;
• determine a magnetic resonance parameter for at least a portion of said image points of said first, second, third and fourth image data sets by determining, for each of said image points, a first image point vector for said first echo time from said first complex image data set that comprises corresponding image points of said first image data set and said second image data set, and determining a second image point vector for said second echo time from said second complex image data set, that comprises corresponding image points of said third image data set and said fourth image data set, and combining said first and second image point vectors to produce a vector combination for which echo time-independent phase portions or echo time-independent magnitude portions in the first and second complex image data sets are at least partially compensated, and determine for each image point, at least one magnetic resonance parameter from said vector combination;
• and
• make the respective magnetic resonance parameters for the respective image points available at an output of said control and evaluation system in a form for use in reconstructing an image from said image points.