定量多切片和联合优化的快速CEST用于体内全脑成像
Ouri Cohen1, Robert J Young2, Ricardo Otazo1,2
1Department of Medical Physics, Memorial Sloan Kettering Cancer Center, New York, New York, USA.
Magnetic resonance in medicine
|March 15, 2025
概括
本研究引入了使用深度学习的优化多切片化学交换和转移 (CEST) 序列. 这种新方法提高了对定量全脑成像的扫描效率和准确性.
科学领域:
- 磁共振成像技术 磁共振成像技术
- 定量成像技术 定量成像技术
- 生物医学工程 生物医学工程
背景情况:
- 化学交换和转移 (CEST) MRI 是评估组织特性的一种强大技术.
- 多切片CEST序列往往会受到降低的灵敏度和效率的影响.
- 优化采集时间表对于改善定量CEST成像至关重要.
研究的目的:
- 开发一种新的多切片CEST脉冲序列和时间表优化框架.
- 为了提高灵敏度和减少定量CESTMRI的扫描时间.
- 为了实现准确和可重现的全脑定量CEST成像.
主要方法:
- 使用深度学习框架,同时优化扫描参数和切片顺序.
- 优化的序列通过数值模拟和健康受试者的体内扫描来评估.
- 评估了包括扫描效率,错误和可重复性 (林的CCC) 在内的定量指标.
主要成果:
- 与随机和单片时间表相比,优化的多片序列显示出更高的扫描效率和更低的误差.
- 在体内定量CEST值与单片序列和先前的研究一致.
- 获得了高的试验-重试和人际可重复性,平均WM/GM CCC值分别为0.8151/0.7779和0.7792/0.7191.
结论:
- 成功开发了一个强大的框架,用于多切片CEST时间表优化和脉冲序列设计.
- 拟议的方法促进了准确,可重现和高效的全脑定量CEST成像.
- 这一进步对需要快速可靠的组织表征的临床应用具有前景.
相关概念视频
01:10Computed Tomography
Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
01:29Positron Emission Tomography
Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body being...
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body being...
01:25Imaging Studies II: Positron Emission Tomography and Scintigraphy
Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET
Fundamental Principles of PET
01:14Brain Imaging
Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans), magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans), magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).
01:28Imaging Studies for Cardiovascular System V: CT
Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
01:27Imaging Studies III: Computed Tomography
DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...