Magnetic resonance imaging apparatus, evaluation device, and method

摘要

An image is generated from data acquired with a magnetic resonance tomography, wherein nuclear spins in an excitation region are excited with different transmission modes and a common image is generated from the response signals.

主权项

1. A method to generate a magnetic resonance image, comprising the steps of:
operating a magnetic resonance data acquisition unit, in which a subject is located, by radiating a first radio-frequency (RF) excitation field in said data acquisition unit using a first RF transmission mode that causes a first magnetic resonance response signal to be emitted from said nuclear spins in said excitation region, and to detect said first magnetic resonance response signal as detected first magnetic resonance data; entering said first magnetic resonance data into an electronic memory, organized as k-space with a plurality of data entry lines therein, by entering said first magnetic resonance data into a first set of said lines in k-space; operating said magnetic resonance data acquisition unit to excite said nuclear spins in said excitation region of said subject by radiating a second RF excitation field in said data acquisition unit interleaved in time with radiating said first RF excitation field, using a second RF transmission mode, said second RF excitation field differing from and not being superimposed with said first RF excitation field, and said second RF transmission mode not being an identical repetition of said first RF transmission mode, that causes a second magnetic resonance response signal to be emitted from said nuclear spins in said excitation region interleaved in time with said first magnetic resonance signal, and to detect said second magnetic resonance signal as detected second magnetic resonance data; entering said second magnetic resonance data into a second set of said lines in k-space, said first set of said lines and said second set of said lines being interleaved with each other in k-space, thereby producing interleaved first and second magnetic resonance data in said memory; and from a computer processor, accessing the interleaved first and second magnetic resonance data from said memory and, in said computerized processor, reconstructing a common, single magnetic resonance image from said interleaved first and second magnetic resonance response data from said memory, and making a data file comprising said common, single magnetic resonance image available in electronic form at an output of said computerized processor.