scholarly journals Simultaneous enhancement of T1 and T2 magnetic resonance imaging of liver tumor at respective low and high magnetic fields

Theranostics ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 410-417
Author(s):  
Huan Li ◽  
Zijuan Hai ◽  
Liwei Zou ◽  
Lele Zhang ◽  
Lulu Wang ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Magnetic Fields ◽  
Liver Tumor ◽  
High Magnetic Fields ◽  
Resonance Imaging ◽  
T1 And T2

Magnetic resonance imaging at high magnetic fields

1998 ◽  
Author(s):  
Jeffrey R. Fitzsimmons ◽  
George R. Duensing ◽  
David M. Peterson
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Magnetic Fields ◽  
High Magnetic Fields ◽  
Resonance Imaging

scholarly journals Metamaterial-based transmit and receive system for whole-body magnetic resonance imaging at ultra-high magnetic fields

PLoS ONE ◽  
2018 ◽  
Vol 13 (1) ◽  
pp. e0191719 ◽  
Author(s):  
Tim Herrmann ◽  
Thorsten Liebig ◽  
Johannes Mallow ◽  
Christian Bruns ◽  
Jörg Stadler ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Magnetic Fields ◽  
Whole Body ◽  
High Magnetic Fields ◽  
Resonance Imaging ◽  
Receive System ◽  
Body Magnetic Resonance Imaging

Evaluation of Relaxation Time Measurements by Magnetic Resonance Imaging

1987 ◽  
Vol 28 (3) ◽  
pp. 345-351 ◽  
Author(s):  
L. Kjær ◽  
C. Thomsen ◽  
O. Henriksen ◽  
P. Ring ◽  
M. Stubgaard ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Relaxation Time ◽  
Magnetic Resonance ◽  
Diffusion Processes ◽  
Relaxation Times ◽  
Gradient Field ◽  
Maximum Deviation ◽  
Resonance Imaging ◽  
T2 Relaxation ◽  
T1 And T2

Several circumstances may explain the great variation in reported proton T1 and T2 relaxation times usually seen. This study was designed to evaluate the accuracy of relaxation time measurements by magnetic resonance imaging (MRI) operating at 1.5 tesla. Using a phantom of nine boxes with different concentrations of CuSO4 and correlating the calculated T1 and T2 values with reference values obtained by two spectrometers (corrected to MRI-proton frequency=64 MHz) we found a maximum deviation of about 10 per cent. Measurements performed on a large water phantom in order to evaluate the homogeneity in the imaging plane showed a variation of less than 10 per cent within 10 cm from the centre of the magnet in all three imaging planes. Changing the gradient field strength apparently had no influence on the T2 values recorded. Consequently diffusion processes seem without significance. It is concluded that proton T1 and T2 relaxation times covering the majority of the biologic range can be measured by MRI with an overall accuracy of 5 to 10 per cent. Quality control studies along the lines indicated in this study are recommended.

Interactions of magnetic resonance imaging radio frequency magnetic fields with elongated medical implants

2000 ◽  
Vol 87 (9) ◽  
pp. 6188-6190 ◽  
Author(s):  
Chris D. Smith ◽  
Alexander V. Kildishev ◽  
John A. Nyenhuis ◽  
Kirk S. Foster ◽  
Joe D. Bourland
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Magnetic Fields ◽  
Radio Frequency ◽  
Medical Implants ◽  
Resonance Imaging

Redoxable heteronanocrystals functioning magnetic relaxation switch for activatable T1 and T2 dual-mode magnetic resonance imaging

Biomaterials ◽  
2016 ◽  
Vol 101 ◽  
pp. 121-130 ◽  
Author(s):  
Myeong-Hoon Kim ◽  
Hye-Young Son ◽  
Ga-Yun Kim ◽  
Kwangyeol Park ◽  
Yong-Min Huh ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Magnetic Relaxation ◽  
Resonance Imaging ◽  
Dual Mode ◽  
T1 And T2
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