Other

Siemens Healthcare Gmbh

Herbert Koestler

Mark A Griswold

Martin Blaimer

Tobias Wech

Dietbert Hahn

Johannes Tran-Gia

Oliver Geier

Felix Ruetzel

In a magnetic resonance (MR) method and apparatus, an image reconstruction algorithm is used to reconstruct image data from k-space data that represent an acquired MR signal, and the reconstruction algorithm makes use of a model that requires the MR signal to exhibit a signal behavior from a relaxation model. In order to permit the reconstruction algorithm to be used when the acquired MR signal does not exhibit the model signal behavior due to motion of the subject, the k-space data are motion-corrected so as to produce corrected k-space data that represent said model signal behavior, and image data are reconstructed from the corrected k-space data using the reconstruction algorithm.

Magnetic resonance imaging method and apparatus with motion-corrected model-based acceleration of parameter mapping

In a method for magnetic resonance imaging, k-space is sampled using density weighted data acquisition or acquisition weighted data acquisition, with at least one region of k-space being intentionally undersampled with respect to the Nyquist criterion. Reconstruction of the MR image is performed using a parallel imaging method, with the influence in the reconstructed image of the missing k-space data, as a result of the undersampling, being reduced.

Parallel MRI involving density weighting or acquisition weighting

Example systems, methods, and apparatus associated with conjugate symmetry in parallel imaging are provided. One example method includes controlling a parallel magnetic resonance imaging (pMRI) apparatus to acquire a first magnetic resonance (MR) signal from a first point in k-space using a phased array of receiving coils. The method also includes identifying a second point in k-space that is related to the first point by a conjugate symmetry relation. The relation may be, for example, a reflection, a rotation, and so on. The method also includes determining a second MR signal associated with the second point based, at least in part, on the first MR signal and the conjugate symmetry relation and then reconstructing an MR image based, at least in part, on both the first MR signal and the second MR signal.

Conjugate symmetry in parallel imaging

Growing community of inventors

Retzbach, Germany

Herbert Koestler