超短T2*映射在7特斯拉使用优化的点向编码时间缩短与辐射采集 (PETRA) 序列在标准和扩展回声时间
Carly A Lockard1,2, Bruce M Damon1,2,3,4,5,6,7, Hacene Serrai1,2,7
1Stephens Family Clinical Research Institute, Carle Health, Urbana, Illinois, United States of America.
PloS one
|April 17, 2025
概括
带有辐射获取的点向编码时间减少 (PETRA) 对于7特斯拉的超短T2*映射是有效的. 这种零回声时间序列为肌肉骨成像提供了高的信号噪声比和良好的重复性.
科学领域:
- 医疗成像医学成像
- 磁共振成像技术 磁共振成像技术
- 生物物理学的生物物理.
背景情况:
- 零回声时间 (ZTE) 序列对于具有超短T2*放松时间的成像组织至关重要.
- 点向编码时间减少与辐射获取 (PETRA) 是一个ZTE序列,具有肌肉骨成像的潜力.
- PETRA在7特斯拉 (T) 的有限评价存在.
研究的目的:
- 为了评估PETRA序列在7T的性能,用于超短T2*映射.
- 为了评估图像质量,信号噪声比 (SNR) 和PETRA在7T的重复性.
- 研究延长回声时间的序列修改,以实现超短T2*映射.
主要方法:
- PETRA成像对MnCl2和原幻体,以及7T的人类膝盖进行了成像.
- 使用1传输/28接收通道膝盖线圈使用标准和修改的PETRA序列.
- 分析了图像工件,信号,SNR,超短T2*值,曲线匹配质量和可重复性.
主要成果:
- 在7T的PETRA显示,与传统TE序列相比,膝盖组织中的SNR更高 (68-337对16-30).
- 超短T2*映射在1.50毫米的同位素分辨率下可行,回声时间≤0.58毫秒.
- 在R2*和MnCl2度,信号和原度之间发现了强烈的线性相关性.
- 在幻象和膝盖中观察到超短T2*<1毫秒的高曲线适合R2和可重复性.
- 在TE = 0.07毫秒时,PETRA实现了高分辨率 (0.34毫米同位素),在TE ≤ 0.58毫秒时实现了较低分辨率 (1.52毫米同位素),扫描时间 < 11 分钟.
结论:
- PETRA是一种可行的ZTE序列,用于7T的高分辨率,高SNR的肌肉骨成像.
- 该序列可以进行定量超短T2*映射,并为亚毫秒T2*组件提供可接受的曲线拟合结果.
- 在超高电场强度下,PETRA为具有超短T2*特性的肌肉骨组织的特征提供了一个有前途的工具.
相关概念视频
Positron Emission Tomography
3.9K
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...
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...
3.9K
Imaging Studies II: Positron Emission Tomography and Scintigraphy
41
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
41


