Koninklijke Philips Corporation N.V.

Suthambhara Nagaraj

Gabriele Marianne Beck

Johannes Martinus Peeters

Jaladhar Neelavalli

Umesh Suryanarayana Rudrapatna

Rupesh Vakkachi Kandi

Chennakeshava Krishna

Naveen Bajaj

Karthik Gopalakrishnan

Disclosed herein is a medical system () comprising a memory () storing machine executable instructions () and a Bfield estimation module (); and a computational system (). Execution of the machine executable instructions causes the computational system to receive () an initial magnetic resonance image () that comprises a magnitude component and is descriptive of a first region () of interest of a subject (). Execution of the machine executable instructions further causes the computational system to perform at least one iteration of the following: receive () subsequent k-space data () descriptive of subsequent region of interest () of the subject; calculate () an estimated Bfield mapping () for the subsequent region of interest from the initial magnetic resonance image by inputting the initial magnetic resonance image into the Bfield estimation module; and reconstruct () a corrected magnetic resonance image () from the subsequent k-space data and the estimated Bfield mapping.

Estimation of Binhomogeneities for improved acquisition and/or reconstruction of magnetic resonance images

The invention relates to a method of MR imaging of an object (). It is an object of the invention to enable MR imaging using a 3D radial or spiral acquisition scheme providing an enhanced image quality in the presence of motion. The method comprises the steps of: —generating MR signals by subjecting the object () to an imaging sequence comprising RF pulses and switched magnetic field gradients; —acquiring the MR signals using a 3D radial or spiral acquisition scheme with oversampling of a central portion () of k-space; —detecting motion-induced displacements (d) and/or deformations of the object () during the acquisition of the MR signals and assigning each of the acquired MR signals to a motion state; —reconstructing an MR image from the MR signals weighted in the central portion () of k-space, wherein a stronger weighting (W,) is applied to MR signals acquired in more frequent motion states, while a weaker weighting (W,) is applied to MR signals acquired in less frequent motion states. Moreover, the invention relates to a MR device () and to a computer program for a MR device ().

MR imaging using a 3D radial or spiral acquisition with soft motion gating

Growing community of inventors

Mysore, India

Suthambhara Nagaraj