Magnetic resonance system, operating method and control device to generate T₂-weighted images using a pulse sequence with very short echo times

摘要

In a method to control a magnetic resonance system to generate magnetic resonance exposures of an examination subject, a first magnetic resonance radio-frequency pulse with a pulse length of at most 50 μs is initially emitted in a volume region of the examination subject. At least one second magnetic resonance radio-frequency pulse, whose phase is essentially rotated by 180° relative to the first magnetic resonance radio-frequency pulse, with a pulse length of at most 50 μs, is emitted in the same volume region of the examination subject in a predetermined time interval immediately after the first magnetic resonance radio-frequency pulse. An acquisition of raw data from the volume region of the examination subject then takes place. Furthermore, a control device for operating a magnetic resonance system as well as a magnetic resonance system with such a control device to implement such a method, are described.

主权项

1. A method to operate a magnetic resonance system to generate a magnetic resonance image of an examination subject, comprising:
operating a magnetic resonance data acquisition unit, with an examination subject therein, to radiate a first radio frequency (RE) pulse into a volume region of the examination subject, said first RF pulse having a pulse length of at most 50 μs; operating said magnetic resonance data acquisition unit to radiate at least one second RF pulse into said volume region of said examination subject at a predetermined time interval immediately following radiation of said first RF pulse, said at least one second RF pulse having a phase that is rotated by substantially 180° with respect to said first RF pulse, and having a pulse length of at most 50 μs; operating said magnetic resonance data acquisition unit to detect magnetic resonance signals emanating from said volume region of the examination subject resulting from excitation of nuclear spins in said volume region of said examination subject at least by said first RF pulse; and in a computer, processing raw data representing the detected magnetic resonance signals to generate image data comprising a magnetic resonance image of said volume region of said examination subject, and making said image data available at an output of said computer in a data file.