Recurrent Inference Machines as Inverse Problem Solvers for MR RelaxometryDownload PDF

06 Apr 2021, 13:18 (modified: 22 Jul 2022, 20:09)MIDL Short 2021 PosterReaders: Everyone
Keywords: Quantitative MRI, Relaxometry, Deep Learning, Mapping, Recurrent Inference Machines
TL;DR: In this paper we present a novel, deep learning based methodology for MR Relaxometry using Recurrent Inference Machines
Abstract: In this work, we propose the use of Recurrent Inference Machines (RIMs) to perform $T_1$ mapping. The RIM is a neural network framework that learns an iterative inference process using a model of the signal, similar to conventional statistical methods for quantitative MRI (QMRI), such as the Maximum Likelihood Estimator (MLE). Previously, RIMs were used to solve linear inverse reconstruction problems. Here, we show that they can also be used to optimize non-linear problems. The developed RIM framework is evaluated in terms of accuracy and precision and compared to an MLE method and an implementation of the ResNet. The results show that, compared to the other techniques in Monte Carlo experiments with simulated data, the RIM improves the precision of estimates without compromising in accuracy.
Paper Type: both
Primary Subject Area: Image Acquisition and Reconstruction
Secondary Subject Area: Application: Radiology
Paper Status: based on accepted/submitted journal paper
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