Validation of quantitative bound- and pore-water imaging in cortical bone
نویسندگان
چکیده
منابع مشابه
Validation of quantitative bound- and pore-water imaging in cortical bone.
PURPOSE To implement and validate a previously proposed ultra-short echo time method for measuring collagen-bound- and pore-water concentrations in bone based on their T2 differences. METHODS Clinically compatible ultra-short echo time image sequences for quantitative T2 -based bound and pore-water imaging in bone were implemented and validated on a 3T human scanner and a 4.7T small bore syst...
متن کامل30-Second bound and pore water concentration mapping of cortical bone using 2D UTE with optimized half-pulses.
PURPOSE MRI of cortical bone has the potential to offer new information about fracture risk. Current methods are typically performed with 3D acquisitions, which suffer from long scan times and are generally limited to extremities. This work proposes using 2D UTE with half pulses for quantitatively mapping bound and pore water in cortical bone. METHODS Half-pulse 2D UTE methods were implemente...
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Introduction: Age-related increase in cortical bone porosity is a major cause of the impaired strength of osteoporotic cortical bone. The majority of these pores, however, are below the resolution limit achievable in vivo. Water H NMR signal in bone at 3T results from two compartments: long T2 (T2 ≥ 1 ms), corresponding to free water in pores (‘pore water’); and short T2 (T2 ~ 300-400 μs), corr...
متن کاملsimulation and experimental studies for prediction mineral scale formation in oil field during mixing of injection and formation water
abstract: mineral scaling in oil and gas production equipment is one of the most important problem that occurs while water injection and it has been recognized to be a major operational problem. the incompatibility between injected and formation waters may result in inorganic scale precipitation in the equipment and reservoir and then reduction of oil production rate and water injection rate. ...
Dielectric determination of bound water of bone.
The dielectric consCa,rlt E' and dielectric loss E ' of human cortical bone have heen measured for frequencies of 1, 10, 50 and 100 kc and for hydrations ( h ) from 0 t o 65 mg-H,O,'g-bone. The absorption isotherm has also been detcrmined. Curves of E' and E" vs h are found to alter sharply at a particular value of the hydration, I t , . defining the ' critical hydration ' of bone. The quantity...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2013
ISSN: 0740-3194
DOI: 10.1002/mrm.24870