LOW FIELD MAGNETIC RESONANCE IMAGING (MRI) SCANNER FOR CARDIAC IMAGING

摘要

A low-cost magnetic resonance imaging (MRI) apparatus that may be used for, e.g., Cardiac MRI (CMR). CMR is a clinical imaging tool that can investigate a wide range of cardiac conditions by exploring changes in the anatomy, physiology, or dynamics of the heart. The applications of CMR include, but are not limited to, the evaluation of congenital heart disease, coronary heart disease, ischemic heart disease, cardiac masses, the pericardium, cardiomyopathy, hibernating myocardium, and valvular and ventricular function. Generally, the MRI apparatus is a low-field (˜0.5 T) system equipped with a high-end data processing unit (DPU) to enable the implementation of structure aware (SA) recovery in clinically relevant times.

主权项

1. A method for reconstructing image data, comprising:
acquiring multichannel k-space data; determining a noise power of the k-space data; determining coil-sensitivity maps; initializing values of relative weights (regularization strengths) applied to each subdictionary used to model an image; iteratively minimizing a weighted l1-norm of image representation in subdictionaries in accordance with the relative weights while constraining the residual norm of the data-fidelity term based on the measured noise power; updating, within each iteration, the relative weights of subdictionaries based on the subdictionary-specific maximum likelihood fitting of coefficient distributions with a Laplacian; and; and outputting the reconstructed images upon convergence.