Quantitative magnetic resonance imaging (MRI) measures tissue parameters such as T1, T2, T2*, and diffusion to detect subtle differences in tissue states (such as microstructure, diffuse fibrosis, edema, hemorrhage, and iron content) from neurological, oncological, and cardiovascular diseases. Because each parameter offers complementary tissue information, multiparameter mapping is very promising for risk assessment, early detection, accurate staging, and treatment monitoring of disease. However, quantitative MRI is typically very time consuming and difficult to perform. Each parameter is typically measured from its own series of images, so measuring multiple parameters leads to long, inefficient scanning sessions. Furthermore, cardiac and breathing motion creates misalignment between images, causing additional problems. The standard approach to motion is to either remove it (e.g., ask the patient to hold their breath) or to synchronize image acquisition with it (e.g., using electrocardiography (ECG) to monitor cardiac motion). This approach makes scan times even longer, limits imaging to patients who can repeatedly perform long breath holds (which is difficult for aging or weak patients) and who have predictable cardiac motion (which is not true of patients with cardiac arrhythmias). Furthermore, these methods are often unreliable and difficult to perform. This project is to develop and validate a new technology, MR Multitasking, to perform multiple simultaneous measurements in a single, push-button scan that is both comfortable for patients and simple for technologists to perform. MR Multitasking redesigns quantitative MRI around the concept of images as functions of many time dimensions, each corresponding to a different dynamic process (e.g., motion, T1, T2, T2*, and diffusion), and then uses mathematical models called low-rank tensors to perform fast, multidimensional imaging. This allows continuous acquisition of imaging data even while the subject is moving, providing motion-resolved parameter maps without breath holding or motion synchronization. We will scan healthy subjects, liver patients, prostate cancer patients, and cardiovascular patients to develop and validate this technology and use artificial intelligence to quickly reconstruct images from the collected data. The resulting tool will be applicable to any organ system, offering clinicians and investigators a valuable tool to answer a wide range of biomedical questions.

Public Health Relevance

This project is to develop and validate a one-stop, push-button solution for comprehensive, motion- resolved quantitative magnetic resonance imaging (MRI). This will be accomplished by cultivating a new technology, MR Multitasking, which can measure multiple tissue biomarkers in a single scan, even in moving organs. The resulting technology will be applicable to any organ system, offering clinicians and investigators a valuable tool to diagnose, monitor, and study a wide range of diseases.

Agency
National Institute of Health (NIH)
Institute
National Institute of Biomedical Imaging and Bioengineering (NIBIB)
Type
Research Project (R01)
Project #
1R01EB028146-01
Application #
9766063
Study Section
Biomedical Imaging Technology Study Section (BMIT)
Program Officer
Liu, Guoying
Project Start
2019-04-01
Project End
2022-12-31
Budget Start
2019-04-01
Budget End
2019-12-31
Support Year
1
Fiscal Year
2019
Total Cost
Indirect Cost
Name
Cedars-Sinai Medical Center
Department
Type
DUNS #
075307785
City
Los Angeles
State
CA
Country
United States
Zip Code
90048