Lattice distortion of CaF2 nanocrystals for shortening their 19F longitude relaxation time

2021 ◽  
Author(s):  
Ran Xu ◽  
Fanqiang Meng ◽  
Yanyue Liu ◽  
Dida Duosiken ◽  
Kang Sun ◽  
...  
Keyword(s):  
Relaxation Time ◽  
Mr Imaging ◽  
Spin Relaxation ◽  
Lattice Distortion ◽  
Scanning Time ◽  
Lattice Spin

As a promising 19F MRI tracer, relatively slow lattice-spin relaxation of CaF2 nanocrystal, which leads to long scanning time of MR imaging, hampered its application. We herein controlled the size...

scholarly journals T2 Relaxation Time of Cartilage at MR Imaging: Comparison with Severity of Knee Osteoarthritis

Radiology ◽  
2004 ◽  
Vol 232 (2) ◽  
pp. 592-598 ◽  
Author(s):  
Timothy C. Dunn ◽  
Ying Lu ◽  
Hua Jin ◽  
Michael D. Ries ◽  
Sharmila Majumdar
Keyword(s):  
Relaxation Time ◽  
Mr Imaging ◽  
Knee Osteoarthritis ◽  
T2 Relaxation Time ◽  
T2 Relaxation

scholarly journals Large anisotropic spin relaxation time of exciton bound to donor states in triple quantum wells

2017 ◽  
Vol 121 (20) ◽  
pp. 205703 ◽  
Author(s):  
S. Ullah ◽  
G. M. Gusev ◽  
A. K. Bakarov ◽  
F. G. G. Hernandez
Keyword(s):  
Relaxation Time ◽  
Quantum Wells ◽  
Spin Relaxation ◽  
Spin Relaxation Time ◽  
Donor States

Changes of spin–spin relaxation time for EPR composites during mixing process

1986 ◽  
Vol 31 (8) ◽  
pp. 2661-2666 ◽  
Author(s):  
Motonobu Furuta ◽  
Tadashi Hikasa ◽  
Eiichi Kato
Keyword(s):  
Relaxation Time ◽  
Spin Relaxation ◽  
Spin Relaxation Time ◽  
Mixing Process

Proton spin-spin relaxation time of peel and flesh of navel orange varieties exposed to freezing temperature

2005 ◽  
Vol 85 (14) ◽  
pp. 2482-2486 ◽  
Author(s):  
Prem N Gambhir ◽  
Young J Choi ◽  
David C Slaughter ◽  
James F Thompson ◽  
Michael J McCarthy
Keyword(s):  
Relaxation Time ◽  
Spin Relaxation ◽  
Freezing Temperature ◽  
Proton Spin ◽  
Spin Relaxation Time ◽  
Navel Orange

scholarly journals Spin–Spin Relaxation Time of Water Protons in κ-Carrageenan Gel

1986 ◽  
Vol 18 (11) ◽  
pp. 891-893 ◽  
Author(s):  
Kunio Hikichi ◽  
Masayuki Tokita ◽  
Satoshi Nakatsuka
Keyword(s):  
Relaxation Time ◽  
Spin Relaxation ◽  
Spin Relaxation Time

Proton MR Spectroscopy and MR Imaging in Acute and Chronic Multiple Sclerosis — Ringlike Appearances in Acute Plaques

1996 ◽  
Vol 37 (1P1) ◽  
pp. 278-287 ◽  
Author(s):  
A.-M. Landtblom ◽  
L. Sjöqvist ◽  
B. Söderfeldt ◽  
H. Nyland ◽  
K.-Å. Thuomas
Keyword(s):  
Multiple Sclerosis ◽  
Relaxation Time ◽  
Mr Imaging ◽  
Brain Lesions ◽  
T2 Relaxation Time ◽  
Healthy Individuals ◽  
T2 Relaxation ◽  
Proton Mrs ◽  
Proton Mr Spectroscopy ◽  
The Core

Purpose: We wanted to compare the metabolite status of brain lesions in different clinical subtypes of multiple sclerosis (MS). Two acute MS lesions with ringlike appearances were also investigated. Material and Methods: Twenty-three clinically stable MS patients, 2 patients with acute relapses, and 15 healthy individuals were examined by MR imaging and localized proton MRS. Results: No metabolite differences were seen in plaques of different subtypes. Decreased NAA/Cr and NAA/choline ratios as well as increased inositol/Cr ratios were observed in the plaques of the clinically stable or chronic active MS patients as compared with controls. The ring plaques had hyperintense cores with surrounding halos, separated from the cores by rings with low signal intensity in T2-weighted images. The core exhibited a prolonged T2 relaxation time. Proton spectra initially contained lactate. Conclusion: No differences between the metabolite status of nonacute plaques in different clinical subtypes could be detected. The ring plaques contained lactate signals indicating oedema, inflammation, and macrophage invasion, and may be transition forms between acute oedematous lesions and chronic demyelinated plaques.

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