scholarly journals Improved in vivo measurement of myocardial transverse relaxation with 3 Tesla magnetic resonance imaging

2009 ◽  
Vol 30 (3) ◽  
pp. 684-689 ◽  
Author(s):  
Jared Guthrie Cobb ◽  
Cynthia B. Paschal
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
3 Tesla ◽  
Resonance Imaging ◽  
Transverse Relaxation ◽  
In Vivo Measurement

Noninvasive measurement and imaging of liver iron concentrations using proton magnetic resonance

Blood ◽  
2005 ◽  
Vol 105 (2) ◽  
pp. 855-861 ◽  
Author(s):  
Timothy G. St. Pierre ◽  
Paul R. Clark ◽  
Wanida Chua-anusorn ◽  
Adam J. Fleming ◽  
Gary P. Jeffrey ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Needle Biopsy ◽  
Hereditary Hemochromatosis ◽  
Iron Concentration ◽  
Relaxation Rates ◽  
Resonance Imaging ◽  
Liver Iron ◽  
Transverse Relaxation

AbstractMeasurement of liver iron concentration (LIC) is necessary for a range of iron-loading disorders such as hereditary hemochromatosis, thalassemia, sickle cell disease, aplastic anemia, and myelodysplasia. Currently, chemical analysis of needle biopsy specimens is the most common accepted method of measurement. This study presents a readily available noninvasive method of measuring and imaging LICs in vivo using clinical 1.5-T magnetic resonance imaging units. Mean liver proton transverse relaxation rates (R2) were measured for 105 humans. A value for the LIC for each subject was obtained by chemical assay of a needle biopsy specimen. High degrees of sensitivity and specificity of R2 to biopsy LICs were found at the clinically significant LIC thresholds of 1.8, 3.2, 7.0, and 15.0 mg Fe/g dry tissue. A calibration curve relating liver R2 to LIC has been deduced from the data covering the range of LICs from 0.3 to 42.7 mg Fe/g dry tissue. Proton transverse relaxation rates in aqueous paramagnetic solutions were also measured on each magnetic resonance imaging unit to ensure instrument-independent results. Measurements of proton transverse relaxivity of aqueous MnCl2 phantoms on 13 different magnetic resonance imaging units using the method yielded a coefficient of variation of 2.1%.

scholarly journals In vivo measurement of myocardial mass using nuclear magnetic resonance imaging

1986 ◽  
Vol 8 (1) ◽  
pp. 113-117 ◽  
Author(s):  
Andrew M. Keller ◽  
Ronald M. Peshock ◽  
Craig R. Malloy ◽  
L. Maximilian Buja ◽  
Ray Nunnally ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Nuclear Magnetic Resonance Imaging ◽  
Resonance Imaging ◽  
Myocardial Mass ◽  
In Vivo Measurement ◽  
Nuclear Magnetic

In vivo skin moisturizing measurement by high-resolution 3 Tesla magnetic resonance imaging

2016 ◽  
Vol 23 (3) ◽  
pp. 289-294 ◽  
Author(s):  
J. Mesrar ◽  
J. Ognard ◽  
M. Garetier ◽  
D. Chechin ◽  
L. Misery ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
High Resolution ◽  
3 Tesla ◽  
Resonance Imaging

Repeatability of a novel technique for in vivo measurement of three-dimensional patellar tracking using magnetic resonance imaging

2005 ◽  
Vol 22 (1) ◽  
pp. 145-153 ◽  
Author(s):  
Robert A. Fellows ◽  
Nick A. Hill ◽  
Norma J. MacIntyre ◽  
Mark M. Harrison ◽  
Randy E. Ellis ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Three Dimensional ◽  
Patellar Tracking ◽  
Resonance Imaging ◽  
In Vivo Measurement ◽  
Novel Technique
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