RU2000100924A - METHOD AND DEVICE FOR FORMING MAGNETIC RESONANCE IMAGES - Google Patents

Claims (10)

1. A method of obtaining images by magnetic resonance (MR) of an object placed in a static magnetic field, comprising the following steps of generating an excitation radio pulse in a body part, measuring a plurality of MR signal families using a plurality of receiver inductance coils along a path in k-space containing the first many lines, by applying a read gradient and other gradients, the formation of the final image from a combination of many families of measured signals MR and depending on the distance of the sensitivities of the plurality of inductance coils of the receiving device, characterized in that for the formation of the final image, the method comprises an additional step of forming images of the inductance coils of the receiving device from each family of measured MR signals, respectively, and the formation of the final image is carried out from a combination of images of the inductance coils of the receiving device and the distance-dependent sensitivities of the receiving inductance coils construction.  2. The method according to claim 1, characterized in that for forming the final image, the method comprises the step of determining an image vector for the final image from a combination of the generalized inversion of the sensitivity matrix and the image vector of the inductors of the receiving device, in which the component of the image vector represents the value of the tissue contrast function in the location of the volume element in the field of view selected from the first set of equidistant volume elements in the first set of adjacent fields of view, e the sensitivity matrix element S (i, j) represents the sensitivity at the location of the selected volume element relative to the inductance coil of the receiver selected from the plurality of inductors of the receiver and the component of the image vector of the inductors of the receiver, representing the pixel value of the image of the inductors of the receiver corresponding to the selected coil the inductance of the receiving device, and the location of the pixel in the image of the coils of the inductor ivnosti receiving device corresponds to the location of the selected volume element in the selected field of view.  3. The method according to claim 1 or 2, characterized in that the conversion coefficient of obtaining families of MR signals is a real value less than the number of inductance coils of the receiving device.  4. The method according to claim 1, 2 or 3, characterized in that it comprises the step of determining the magnitude of the image vector from the number of equidistant voxels in the final field of view of the final image, and this number is less than or equal to the number of inductors of the receiving device, and the distance between subsequent voxels equal to the field of view.  5. The method according to claim 1, 2, 3 or 4, characterized in that it comprises the step of excluding from the formation of the final image of the volume elements in the final field of view outside the predetermined area that does not contain the object.  6. The method according to claim 1, 2, 3, 4 or 5, characterized in that it comprises the step of determining a sensitivity matrix from a sensitivity display comprising a combination of predetermined reference images of the inductance coils of the receiving device and a predetermined reference image.  7. The method according to claim 5 or 6, characterized in that it comprises the step of filtering the sensitivity display in order to obtain sensitivity displays covering the area in the final field of view in excess of the area of interest.  8. The method according to claim 6, characterized in that it comprises the step of obtaining a predetermined reference image of the inductance coils of the receiving device using the MR method, comprising the following steps: generating an excitation radio pulse in the body part, measuring a plurality of reference sets of inductance coils of the receiving device of the MR signals, using a plurality of receiver coils along a predetermined path containing a second plurality of lines in k-space, by applying a read gradient other gradients, and the formation of reference images of the inductance coils of the receiving device from the set of families of measured MR signals, respectively, with the second set of lines being smaller than the first set of lines.  9. The method according to claim 6 or 7, characterized in that it comprises the step of obtaining a predetermined reference image by the MR method, comprising the steps of: generating an excitation radio pulse in the object, measuring a reference family of MR signals along a predetermined path containing a third set of lines in the kaon space , by applying a read gradient and other gradients and forming a reference image from the measured MR signals.  10. An MR device for acquiring MR images of a body part, comprising input terminals for arranging a receiver inductance coils, a body inductor, means for measuring a plurality of MR signal families by arranging a receiver inductance coils, means for generating a final image from the distance-dependent sensitivity of the coils the inductance of the receiving device and the set of families of measured MR signals, characterized in that the MR device contains means to form a plurality of images of the receiving coils of a plurality of device families MR signals measured respectively and means for generating a final image from a combination of a plurality of images of the receiving coils and devices depending on the distance sensitivities inductors receiver.