MRI method for assigning individual pixels or voxels tissue-specific PET attenuation values

摘要

A magnetic resonance (MR) system (10) generates an attenuation or density map. The system (10) includes a MR scanner (48) defining an examination volume (16) and at least one processor (54). The at least one processor (54) is programmed to control the MR scanner (48) to apply imaging sequences to the examination volume (16). In response to the imaging sequences, MR data sets of the examination volume (16) are received and analyzed to identify different tissue and/or material types found in pixels or voxels of the attenuation or density map. One or more tissue-specific and/or material-specific attenuation or density values are assigned to each pixel or voxel of the attenuation or density map based on the tissue and/or material type(s) identified as being in each pixel or voxel during the analysis of the MR data sets. In one embodiment, the tissue and/or material types are identified on the basis of a time series of MR phase images.

主权项

1. A magnetic resonance (MR) system for generating a map, said system comprising:
a MR scanner defining an examination volume; and, at least one processor programmed to:
control the MR scanner to apply imaging sequences to the examination volume;in response to the imagine sequences, receive MR data sets of the examination volume wherein the MR data sets include MR phase data of a series of echo time (TE) acquisitions;identify change in phase over time of the MR phase data to identify different tissue and/or material types found in pixels car voxels of the map; andassign one or more tissue-specific and/or material-specific values to each pixel or voxel of the map based on the tissue and/or material type(s) identified as being in each pixel or voxel during the analysis of the MR data sets.