scholarly journals Assessment of31P relaxation times in the human calf muscle: A comparison between 3 T and 7 T in vivo

2009 ◽  
Vol 62 (3) ◽  
pp. 574-582 ◽  
Author(s):  
W. Bogner ◽  
M. Chmelik ◽  
A.I. Schmid ◽  
E. Moser ◽  
S. Trattnig ◽  
...  
Keyword(s):  
Relaxation Times ◽  
Calf Muscle ◽  
Human Calf

NOE Enhancements and T1 Relaxation Times of Phosphorylated Metabolites in Human Calf Muscle at 1.5 Tesla

1995 ◽  
Vol 33 (3) ◽  
pp. 417-421 ◽  
Author(s):  
Truman R. Brown ◽  
Radka Stoyanova ◽  
Tamela Greenberg ◽  
Ravi Srinivasan ◽  
Joseph Murphy-Boesch
Keyword(s):  
Relaxation Times ◽  
Calf Muscle ◽  
T1 Relaxation ◽  
Human Calf

scholarly journals Relaxation times of31P-metabolites in human calf muscle at 3 T

2003 ◽  
Vol 49 (4) ◽  
pp. 620-625 ◽  
Author(s):  
Martin Meyerspeer ◽  
Martin Kr??�k ◽  
Ewald Moser
Keyword(s):  
Relaxation Times ◽  
Calf Muscle ◽  
Human Calf

In vivo imaging of the time-dependent apparent diffusional kurtosis in the human calf muscle

2014 ◽  
Vol 41 (6) ◽  
pp. 1581-1590 ◽  
Author(s):  
Anja Maria Marschar ◽  
Tristan Anselm Kuder ◽  
Bram Stieltjes ◽  
Armin Michael Nagel ◽  
Peter Bachert ◽  
...  
Keyword(s):  
In Vivo Imaging ◽  
Calf Muscle ◽  
Time Dependent ◽  
Human Calf

scholarly journals In vivo diffusion tensor imaging of the human calf muscle

2006 ◽  
Vol 24 (1) ◽  
pp. 182-190 ◽  
Author(s):  
Shantanu Sinha ◽  
Usha Sinha ◽  
V. Reggie Edgerton
Keyword(s):  
Diffusion Tensor Imaging ◽  
Diffusion Tensor ◽  
Calf Muscle ◽  
Human Calf

scholarly journals Whole-brain 3D MR fingerprinting brain imaging: clinical validation and feasibility to patients with meningioma

2021 ◽  
Author(s):  
Thomaz R. Mostardeiro ◽  
Ananya Panda ◽  
Robert J. Witte ◽  
Norbert G. Campeau ◽  
Kiaran P. McGee ◽  
...  
Keyword(s):  
White Matter ◽  
Statistical Significance ◽  
Relaxation Times ◽  
Brain Structures ◽  
Centrum Semiovale ◽  
In Vivo Evaluation ◽  
Whole Brain ◽  
Mean Values ◽  
Caudate Head

Abstract Purpose MR fingerprinting (MRF) is a MR technique that allows assessment of tissue relaxation times. The purpose of this study is to evaluate the clinical application of this technique in patients with meningioma. Materials and methods A whole-brain 3D isotropic 1mm3 acquisition under a 3.0T field strength was used to obtain MRF T1 and T2-based relaxometry values in 4:38 s. The accuracy of values was quantified by scanning a quantitative MR relaxometry phantom. In vivo evaluation was performed by applying the sequence to 20 subjects with 25 meningiomas. Regions of interest included the meningioma, caudate head, centrum semiovale, contralateral white matter and thalamus. For both phantom and subjects, mean values of both T1 and T2 estimates were obtained. Statistical significance of differences in mean values between the meningioma and other brain structures was tested using a Friedman’s ANOVA test. Results MR fingerprinting phantom data demonstrated a linear relationship between measured and reference relaxometry estimates for both T1 (r2 = 0.99) and T2 (r2 = 0.97). MRF T1 relaxation times were longer in meningioma (mean ± SD 1429 ± 202 ms) compared to thalamus (mean ± SD 1054 ± 58 ms; p = 0.004), centrum semiovale (mean ± SD 825 ± 42 ms; p < 0.001) and contralateral white matter (mean ± SD 799 ± 40 ms; p < 0.001). MRF T2 relaxation times were longer for meningioma (mean ± SD 69 ± 27 ms) as compared to thalamus (mean ± SD 27 ± 3 ms; p < 0.001), caudate head (mean ± SD 39 ± 5 ms; p < 0.001) and contralateral white matter (mean ± SD 35 ± 4 ms; p < 0.001) Conclusions Phantom measurements indicate that the proposed 3D-MRF sequence relaxometry estimations are valid and reproducible. For in vivo, entire brain coverage was obtained in clinically feasible time and allows quantitative assessment of meningioma in clinical practice.

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