ECHO-PLANAR IMAGING MAGNETIC RESONANCE ELASTOGRAPHY PULSE SEQUENCE

摘要

Magnetic resonance elastography (MRE) is an imaging technique for estimating the stiffness of tissues non-invasively. Shear waves are generated via external mechanical actuation and the tissue imaged with a specially designed MR pulse sequence. The resulting images are used to calculate the underlying properties. The application provides methods for acquiring MRE data using a single shot, echo planar imaging readout. The purpose of the developed sequence is to acquire MRE data using a single-shot, echo-planar imaging readout, avoiding to need for off-line image processing.

主权项

1. A computer-readable storage medium, comprising executable instructions that, when executed by a processor, facilitate performance of operations, comprising:
applying a vibration to human tissue; acquiring a sample magnetic resonance echo planar image of the human tissue subject to the vibration using a motion encoded gradient sequence; measuring a contrast to noise ratio of the sample magnetic resonance echo planar image; adjusting magnetic resonance elastographic parameters based on the contrast to noise ratio; and generating an updated motion encoded gradient sequence using the adjusted magnetic resonance elastographic parameters to improve the contrast to noise ratio.