Van Steenkiste Gwendolyn, Poot Dirk H J, Jeurissen Ben, den Dekker Arnold J, Vanhevel Floris, Parizel Paul M, Sijbers Jan
iMinds-Vision Lab, Department of Physics, University of Antwerp, Antwerp, Belgium.
Imaging Science and Technology, Delft University of Technology, 2628 CJ, Delft, The Netherlands.
Magn Reson Med. 2017 May;77(5):1818-1830. doi: 10.1002/mrm.26262. Epub 2016 Jul 1.
Quantitative T mapping is a magnetic resonance imaging technique that estimates the spin-lattice relaxation time of tissues. Even though T mapping has a broad range of potential applications, it is not routinely used in clinical practice as accurate and precise high resolution T mapping requires infeasibly long acquisition times.
To improve the trade-off between the acquisition time, signal-to-noise ratio and spatial resolution, we acquire a set of low resolution T -weighted images and directly estimate a high resolution T map by means of super-resolution reconstruction.
Simulation and in vivo experiments show an increased spatial resolution of the T map, while preserving a high signal-to-noise ratio and short scan time. Moreover, the proposed method outperforms conventional estimation in terms of root-mean-square error.
Super resolution T estimation enables resolution enhancement in T mapping with the use of standard (inversion recovery) T acquisition sequences. Magn Reson Med 77:1818-1830, 2017. © 2016 International Society for Magnetic Resonance in Medicine.
定量T图谱是一种磁共振成像技术，用于估计组织的自旋晶格弛豫时间。尽管T图谱有广泛的潜在应用，但在临床实践中并未常规使用，因为准确且精确的高分辨率T图谱需要极长的采集时间，这在实际中不可行。
为了改善采集时间、信噪比和空间分辨率之间的权衡，我们采集了一组低分辨率T加权图像，并通过超分辨率重建直接估计高分辨率T图谱。
模拟和体内实验表明，T图谱的空间分辨率提高，同时保持了高信噪比和短扫描时间。此外，在均方根误差方面，所提出的方法优于传统估计方法。
超分辨率T估计能够使用标准（反转恢复）T采集序列提高T图谱的分辨率。《磁共振医学》77:1818 - 1830, 2017。© 2016国际磁共振医学学会。
