diffusion coefficient


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diffusion coefficient

or

diffusion constant

n
(General Physics) the rate at which a diffusing substance is transported between opposite faces of a unit cube of a system when there is unit concentration difference between them. Symbol: D Also called: diffusivity
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(3) Considering the time dependence of chloride diffusion coefficient, it is apparent that chloride diffusion coefficient [D.sub.a] was used when predicting the chloride ingress in concrete.
Wienke, "Correlation between apparent diffusion coefficient (ADC) and cellularity is different in several tumors: a meta-analysis," Oncotarget, vol.
where D is the chloride diffusion coefficient of mortar, C is the chloride concentration at any time, and t is a function of depth, x.
For mortars with a different sand content, the measured geometric factors for [Li.sup.+], [Cl.sup.-], and HTO are relatively similar, leading to the conclusion that the formation factor can be used to determine the order of magnitude of the effective diffusion coefficient of other diffusion species [36].
The mean apparent diffusion coefficient value of the malignant breast lesions was significantly lower than that of the benign breast lesions (p-value<0.001).
Keywords: Magnetic resonance imaging, parotid glands, diffusion weighted imaging, apparent diffusion coefficient
(2004), the diffusion rate decreases, reducing the effective diffusion coefficient when the water and sucrose concentration inside the fruit become close to reaching the equilibrium value.
Finally, apparent diffusion coefficient (ADC) values were extracted from MRI data.
Inverse correlation between choline magnetic resonance spectroscopy signal intensity and the apparent diffusion coefficient in human glioma.
The diffusion coefficient (D), in transient state, can be measured through various different methods as found in the literature.
The diffusion coefficient of each ionic species has the following relation with tortuosity [15]:
For the surgical and treatment planning a diagnostic method is highly desirable for accurate distinction between benign and malignant meningiomas.12 Diffusion weighted imaging (DWI) along with the calculation of apparent diffusion coefficient (ADC), is a reliable and non-invasive technique of choice for accurate assessment and in treatment planning of different types of brain tumors.

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