Quantitative MRI and Deep Learning Technologies for Classification of NAFLD

用于 NAFLD 分类的定量 MRI 和深度学习技术

• 批准号: 10453927
• 负责人: Maria I. Altbach
• 金额: $ 60.83万
• 依托单位: UNIVERSITY OF CALIFORNIA LOS ANGELES
• 依托单位国家: 美国
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-08-01 至 2027-04-30
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/10453927
• 关键词: Abdomen; Adoption; Area; Arizona; Attention; Biological Markers; Biomedical Engineering; Biopsy; Breathing; California; Cells; Cessation of life; Characteristics; Cirrhosis; Classification; Clinic; Clinical; Data; Detection; Development; Diagnosis; Disease; Fatty Liver; Fatty acid glycerol esters; Fibrosis; Financial compensation; Future; Goals; Health Care Costs; Hepatic; Image Enhancement; Imaging Techniques; Inflammation; Interdisciplinary Study; Interobserver Variability; Iron Overload; Joints; Label; Lead; Life; Liver; Liver Failure; Liver Fibrosis; Liver parenchyma; Los Angeles; MRI Scans; Magnetic Resonance; Magnetic Resonance Elastography; Magnetic Resonance Imaging; Maps; Measures; Medical Imaging; Modeling; Monitor; Morbidity - disease rate; Morphologic artifacts; Motion; Outcome; Patients; Performance; Perfusion; Physics; Protocols documentation; Protons; ROC Curve; Radial; Reproducibility; Research; Risk Factors; Sampling Errors; Scanning; Scheme; Signal Transduction; Staging; Techniques; Technology; Testing; Time; Tissues; Training; Uncertainty; Universities; Validation; Water; base; chronic liver disease; contrast enhanced; deep learning; deep learning model; density; disease classification; elastography; hepatocyte injury; image processing; improved; learning strategy; liver biopsy; liver inflammation; magnetic resonance imaging biomarker; new technology; non-alcoholic fatty liver; non-alcoholic fatty liver disease; nonalcoholic steatohepatitis; novel therapeutics; prospective; prospective test; reconstruction; sensor; simple steatosis; treatment response

PROJECT SUMMARY Non-alcoholic fatty liver disease (NAFLD) is the most common chronic liver disease in the U.S. and ranges from simple fatty liver (or non-alcoholic fatty liver, NAFL) to the progressive form, non-alcoholic steatohepatitis (NASH). About 20-30% of subjects with NAFL develop NASH, which is caused by hepatocyte injury, hepatic inflammation, and resultant hepatic fibrosis. NASH can lead to life-threatening conditions, but is difficult to diagnose at early stages. Liver biopsy is the current standard to diagnose NAFL/NASH, but biopsy is invasive, has associated morbidity, and is limited by sampling errors and inter-observer variability. Many patients present with later stage NASH, adversely impacting outcomes and healthcare costs, which are estimated at $32 billion annually in the U.S. Magnetic resonance imaging (MRI), including elastography (MRE), is a technology that can non-invasively quantify hepatic fat (MRI proton-density fat fraction), iron overload (MRI R2*), and fibrosis (MRE stiffness). However, current liver MRI is challenged by motion artifacts and incomplete signal models, which can compromise the accuracy and reproducibility of the quantitative parameters derived from them. In addition, early tissue changes associated with NASH are not adequately characterized using conventional MRI. The common requirements of breath-holding and long protocols also severely limit the adoption of liver MRI in the clinic. Furthermore, the present clinical interpretation of MRI has limited ability to distinguish NASH from NAFL. The research teams at the University of California Los Angeles, University of Arizona, and Siemens have been leading the development of motion-robust radial MRI to quantify hepatic PDFF and R2*, T2 and T1, perfusion, and stiffness. The Siemens team has also developed deep learning methods for medical image processing and disease detection and classification. In this bioengineering research partnership project, the multi-disciplinary research team will investigate four aims: (1) Develop a robust motion compensation framework for free-breathing multi-parametric quantitative radial liver MRI; (2) Accelerate quantitative liver MRI scans through combined acquisition and joint modeling of multiple parameters, data undersampling, and deep learning-based reconstruction and quantification; (3) Develop deep learning models to accurately classify NAFL versus NASH and measure the degree of fibrosis based on quantitative MRI; (4) Prospectively assess the new quantitative MRI and deep learning technologies for classifying NAFL versus NASH and measuring fibrosis in patients, with respect to liver biopsy. The new free- breathing quantitative MRI and deep learning technologies developed in this project will accurately classify NAFL versus NASH and measure fibrosis using data from the entire liver and thus help to avoid liver biopsy, allow monitoring of treatment responses, and accelerate the development and implementation of new therapies.

项目总结 非酒精性脂肪性肝病(NAFLD)是美国最常见的慢性肝病 从单纯性脂肪肝(或非酒精性脂肪肝，NAFL)到进展型非酒精性脂肪性肝炎 (纳什)。大约20%-30%的NAFL患者发生NASH，这是由肝细胞损伤，肝脏 炎症，以及由此导致的肝纤维化。纳什可以导致危及生命的情况，但很难做到 早期诊断。肝活检是目前诊断NAFL/NASH的标准，但活检是侵入性的， 有相关的发病率，并受到抽样误差和观察员间变异性的限制。很多病人 出现晚期NASH，对结果和医疗成本产生不利影响，估计为 美国每年320亿美元。磁共振成像(MRI)，包括弹性成像(MRE)，是一种 可无创量化肝脏脂肪(MRI质子密度脂肪分数)、铁超载(MRI)的技术 R2*)和纤维化(MRE硬度)。然而，目前的肝脏磁共振成像存在运动伪影和不完整的问题。 信号模型，这可能会影响所得到的定量参数的准确性和重复性 从他们那里。此外，与NASH相关的早期组织变化不能用 常规核磁共振检查。屏气和长协议的共同要求也严重限制了 肝脏MRI在临床上的应用。此外，目前对mri的临床解释能力有限。 区分纳什和NAFL。加州大学洛杉矶分校、加州大学洛杉矶分校的研究团队 亚利桑那州和西门子一直在引领运动健壮的放射状MRI的发展，以量化肝脏 PDFF和R2*，T2和T1，血流灌注和僵硬。西门子团队还开发了深度学习 医学图像处理和疾病检测与分类方法。在这项生物工程中 研究伙伴计划，多学科研究小组将调查四个目标：(1)开发一种 自由呼吸多参数放射状肝脏MRI的稳健运动补偿框架 通过联合采集和联合建模提高肝脏MRI定量扫描速度 参数、数据欠采样和基于深度学习的重建和量化；(3)开发深度 准确地对NAFL和NASH进行分类并测量纤维化程度的学习模型 定量核磁共振；(4)前瞻性评估新的定量核磁共振和深度学习技术 对照肝脏活检，对NAFL和NASH进行分类，并测量患者的纤维化程度。新的免费- 在这个项目中开发的呼吸定量核磁共振和深度学习技术将准确地分类 NAFL与NASH相比，并使用来自整个肝脏的数据来测量纤维化，从而帮助避免肝脏活检， 允许监测治疗反应，并加快开发和实施新的 治疗。