Disclosed is a method for producing magnetic resonance tomography images (B) of at least one phase of a cyclic movement, comprising the method steps: production of raw data sets (r1, . . . , rx) of the cyclic movement during a recording period (T) having radial or almost radial k-space part trajectories (k1, . . . , kx); reconstruction of a series of intermediate images (z1, . . . , zy), each from at least one raw data set (r1, . . . , rx) with high time resolution at least for each region (region of interest, ROI) of the raw data sets (r1, . . . , rx); calculation of a distance matrix (D) from the series of intermediate images (z1, . . . , zy), wherein each matrix element (D) corresponds to the distance of a first intermediate image (z1, . . . , zy) of the series to the first or a further intermediate image (z1, . . . , zy) of the series; fitting of functions (vi, . . . , vz) to structures forming in the distance matrix (D) by means of an active contour method and reconstruction of at least one image (B) from the raw data sets (r1, . . . , rx), said raw data sets corresponding to intersection (S) of the fitted curves (v1, . . . , vz) with a line of the distance matrix (D).

A surface coil holder having four degrees of freedom is provided. The surface coil holder is capable of being attached to a scanner table of an exercise apparatus. The surface coil holder includes a coil cradled in the coil holder and secured by hook and loop strips.

The present disclosure relates to systems and methods for attenuation correction. The system includes a coil module, which includes a flexible coil and a supporter. The supporter may be configured to hold the flexible coil. The flexible coil may be deformed to form a receiving space.

Various embodiments relate to a method for determining distortion-reduced magnetic resonance data in a subarea of a magnetic resonance system located along a radial direction of the magnetic resonance system at the edge of a field of view of the magnetic resonance system. The method includes positioning the object to be examined at a first and a second position along an axial direction of the magnetic resonance system and acquiring first magnetic resonance data in the subarea at the first position and acquiring second magnetic resonance data in the same subarea at the second position. The method also includes determining distortion-reduced magnetic resonance data based on the first and second magnetic resonance data.

In a method and apparatus for allocating MR imaging signals from a person under examination to N different movement states that occur in the person under examination. MR signals are acquired for the creation of MR images that represent at least one region of the person under examination. A number of MR navigator data sets of the person under examination also are acquired. A cluster analysis is applied to the MR navigator data sets in order to identify similarities in the MR navigator data sets. Similar navigator data sets are allocated to a movement state of the person under examination, the multiple navigator data sets all being allocated respectively to one movement state of the N movement states. The MR imaging signals acquired thus can be allocated to the N movement states.

Disclosed is a method for producing magnetic resonance tomography images (B) of at least one phase of a cyclic movement, comprising the method steps: production of raw data sets (r1, . . . , rx) of the cyclic movement during a recording period (T) having radial or almost radial k-space part trajectories (k1, . . . , kx); reconstruction of a series of intermediate images (z1, . . . , zy), each from at least one raw data set (r1, . . . , rx) with high time resolution at least for each region (region of interest, ROI) of the raw data sets (r1, . . . , rx); calculation of a distance matrix (D) from the series of intermediate images (z1, . . . , zy), wherein each matrix element (D) corresponds to the distance of a first intermediate image (z1, . . . , zy) of the series to the first or a further intermediate image (z1, . . . , zy) of the series; fitting of functions (vi, . . . , vz) to structures forming in the distance matrix (D) by means of an active contour method and reconstruction of at least one image (B) from the raw data sets (r1, . . . , rx), said raw data sets corresponding to intersection (S) of the fitted curves (v1, . . . , vz) with a line of the distance matrix (D).

A joint of a patient is scanned using MRI apparatus, and images of the joint area are produced as a body part of the patient is moved into a particular position known to cause a problem in the joint. The patient may walk or run on a treadmill during the process, or the body part may be supported on a surface causing or allowing such movement.