scholarly journals Two-pedal ergometer for in vivo MRS studies of human calf muscles

2001 ◽  
Vol 46 (5) ◽  
pp. 1000-1005 ◽  
Author(s):  
Maria Pia Francescato ◽  
Valentina Cettolo
Keyword(s):  
Human Calf ◽  
Calf Muscles ◽  
In Vivo Mrs

3D Microstructural Fiber Tracking of the Human Calf Muscles in Individuals With and Without Type 2 Diabetes during Rest and Exercise

Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 632-P
Author(s):  
MASOUD EDALATI ◽  
CHRISTOPHER J. SORENSEN ◽  
MARY HASTINGS ◽  
MOHAMED A. ZAYED ◽  
MICHAEL J. MUELLER ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Fiber Tracking ◽  
Human Calf ◽  
Calf Muscles ◽  
Rest And Exercise

Two-Stage Evolutionary Quantification of In Vivo MRS Metabolites

2015 ◽  
pp. 537-560
Author(s):  
G.A. Papakostas ◽  
D.A. Karras ◽  
B.G. Mertzios ◽  
D. van Ormondt ◽  
D. Graveron-Demilly
Keyword(s):  
Two Stage ◽  
In Vivo Mrs

scholarly journals In vivo MRS measurement of 2‐hydroxyglutarate in patient‐derived IDH‐mutant xenograft mouse models versus glioma patients

2020 ◽  
Vol 84 (3) ◽  
pp. 1152-1160 ◽  
Author(s):  
Vivek Tiwari ◽  
Tomoyuki Mashimo ◽  
Zhongxu An ◽  
Vamsidhara Vemireddy ◽  
Sara Piccirillo ◽  
...  
Keyword(s):  
Mouse Models ◽  
In Vivo Mrs

Evaluation of Volume Selection Methods in in Vivo MRS

1995 ◽  
Vol 36 (3) ◽  
pp. 317-322 ◽  
Author(s):  
G. Starck ◽  
R. Lundin ◽  
E. Forssell-Aronsson ◽  
M. Arvidsson ◽  
M. Alpsten ◽  
...  
Keyword(s):  
Clinical Situation ◽  
The Body ◽  
Precision Measurements ◽  
Profile Measurement ◽  
Body Regions ◽  
Phantom Measurements ◽  
Signal Profile ◽  
In Vivo Mrs

In vivo MR spectroscopy (MRS) requires some kind of volume selection method to be able to measure the signal from a selected part of the body. To be able to interpret the spectra correctly, the quality of the volume selection must be investigated for each new MRS application using phantom measurements. A new phantom, especially suitable for precision measurements of the volume selection performance, is presented. It contains a small, remotely controlled signal source placed inside a larger vessel. This principle can be applied to various body regions, coil types and nuclei. The measurement conditions are close to the clinical situation. The phantom does not have to be repositioned during a signal profile measurement and the signal contribution from each point along the profile is determined regarding sign and amplitude.

Non-Invasive Measurement of In-Vivo Elasticity of Skeletal Muscles with MR-Elastography

2007 ◽  
Vol 342-343 ◽  
pp. 901-904
Author(s):  
Yu Bong Kang ◽  
T. Oida ◽  
Duk Young Jung ◽  
A. Fukuma ◽  
T. Azuma ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shear Modulus ◽  
Skeletal Muscles ◽  
Soft Tissues ◽  
Viscosity Coefficient ◽  
Non Invasive ◽  
Novel Method ◽  
Human Calf ◽  
Invasive Measurement

In order to evaluate the mechanical properties of the human skeletal muscles, the elasticity and viscosity of the human calf muscles were measured with Magnetic Resonance Elastography (MRE). MRE is a novel method to measure the mechanical properties of living soft tissues in vivo quantitatively by observing the strain waves propagated in the object. In this study, the shear modulus and viscosity coefficient were measured with MRE. The shear modulus was 3.7 kPa in relaxed state, and increased with increasing the muscle forces. Interestingly, the viscosity was changed with the vibration frequency applied to the muscles, that was 4.5 Pa·s at 100Hz vibration and 2.4 Pa·s at 200Hz vibration. This shows clearly the visco-elastic property.

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