Correction of artifacts in mr - images as a result of inadequate excitation in the case of ultra-short echo times

摘要

The method according to the invention for correction of artifacts in mri images, which, by means of an mr - pulse sequence, in which during the irradiating at least of a non-selective excitation pulse which are connected at the same time gradient, have been recorded, comprises the steps:– Loading of the pulse sequence recorded measurement data in the k - space (f ''(k)),– Determining a disturbance matrix (d_kx) on the basis of location - and k - space point data of the recorded measurement data and the gradients used during the excitation,– Calculating a corrected image from the recorded measurement data in the k - space (f ''(k)) and the interference matrix (d), wherein the calculation of the corrected image is a matrix inversion of the interference matrix (d) comprises,– Display and / or storing of the corrected image.By calculating a matrix of susceptibility to be measured on the basis of the location of the read out k - spatial points and of the during the excitation applied gradient and the inversion of this interference matrix, can be of the disturbing influence of a non-uniform, faulty excitation in a simple manner to eliminate. The image quality, especially in the outer regions of the reconstructed image, can thus be significantly improved.