| CPC G01R 33/56308 (2013.01) [A61B 6/5211 (2013.01); G01R 33/5608 (2013.01)] | 11 Claims |
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1. A method for acquiring and reconstructing a four-dimensional dynamic magnetic resonance (MR) image data record of an examination region of a patient, said method comprising:
from a computer, operating an MR data acquisition scanner so as to execute a dynamic MR data acquisition procedure wherein MR data of an examination region of a patient are continuously acquired, and entered into a memory organized as k-space, by radial scanning of k-space along respective radial k-space lines;
in said computer, during respective individual time segments of a recording period during which said MR data are acquired in said dynamic data acquisition procedure, reconstructing respective MR images from at least some of the acquired MR data respectively in said k-space lines into which said MR data were entered during the respective time segment;
in said computer, determining a dynamic region and a non-dynamic region by evaluating a position of a saturation region in an MR data acquisition sequence that is used to acquire said MR data;
in said computer, dividing said examination region spatially into said dynamic region, in which said dynamic data acquisition procedure takes place, and said non-dynamic region outside of said dynamic region, and reconstructing a static MR image data record that is a combination of MR data acquired in a plurality of the individual time segments, marking, in said static MR image data record, image data that originate from said non-dynamic region, performing an inverse transformation of the marked image data in said static MR data record, and creating respective modified MR data by eliminating marked image data from said MR data; and
in said computer, reconstructing MR images for said respective time segments from modified MR data so as to compile a dynamic image data record in said dynamic region.
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