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相关概念视频

Computed Tomography01:10

Computed Tomography

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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...
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规范化的SUPER-CAIPIRINHA:加速3D可变翻转角度T1映射,具有准确和高效的重建.

Fan Yang1, Jian Zhang2, Guobin Li2

  • 1Institute for Medical Imaging Technology, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai, People's Republic of China.

Magnetic resonance in medicine
|May 29, 2023
PubMed
概括

一种新方法通过结合SUPER,CAIPIRINHA和规范化来加速3D T1映射. 这种方法可以提高图像质量和重建速度,以便在潜在的临床应用中使用.

关键词:
卡伊皮林哈 (CAIPIRINHA) 是一个这是超级超级的.在 VFA T1 映射中使用 VFA T1.加速加速加速的加速.基于模型的重建.规范化的超级CAIPIRINHAHAHA可以使用.

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科学领域:

  • 磁共振成像是一种磁共振成像技术.
  • 医学物理 医学物理
  • 生物医学工程 生物医学工程

背景情况:

  • 准确的T1映射对于定量MRI至关重要.
  • 加快3D可变翻转角度 (VFA) T1映射对于临床可行性至关重要.
  • 现有的加速方法在效率和分辨率方面存在局限性.

研究的目的:

  • 提出和评估一个加速的3D VFA T1映射方法.
  • 使用SUPER技术来提高效率和分辨率.
  • 整合CAIPIRINHA和总变量调节以改善加速.

主要方法:

  • 开发了一个规范化的SUPER-CAIPIRINHA (rSUPER-CAIPIRINHA) 方法.
  • 与CAIPIRINHA结合的SUPER下样采样.
  • 采用基于总变化的规范化和近似算法.
  • 通过模拟和体内脑T1映射进行验证,与L+S和REPCOM进行比较.

主要成果:

  • 与L+S和REPCOM相比,RSUPER-CAIPIRINHA的NRMSE显著降低,SSIM的水平更高.
  • 重建时间大幅缩短 (6%的L+S,2%的REPCOM).
  • 定性评估显示图像质量有所改善,文物减少,模糊,明显SNR较低.

结论:

  • 在RSUPER-CAIPIRINHA方法有效地加速3D VFA T1映射.
  • 它减轻了噪音,文物和模糊,同时提高了重建速度.
  • 这种技术在MRI中的临床应用方面表现有前途.