magnetisation


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magnetisation

An MRI term for the volume average of the magnetic dipole moment.
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References in periodicals archive ?
In the case of imaged tissue where TI [approximately equal to] 1 sec, and 100 ml of tagged blood volume is delivered in a normal flow rate of 60 ml/min, the magnetisation variation will be around 1%.
A modification of the Bloch equation for longitudinal magnetisation to include the flow effect according to Fick's principle (difference between delivery and clearance of substance in blood is proportional to the local flow) has been introduced by Detre and Williams [19]:
where [M.sub.0] is the longitudinal magnetisation of the tissue at the equilibrium and M, Ma, and Mv are the time-dependent longitudinal magnetizations of the tissue, arterial, and venous blood, respectively.
Furthermore, by considering two assumptions, the relationship between the magnetisation of blood and tissue can be clarified.
The saturation magnetisation was measured at variable magnetic field at a constant temperature of 300 K.
It is observed that the samples rise to maximum magnetisation very rapidly, and this observation is similar to that of super-paramagnetic nanocomposites at room temperature reported in the literature [16, 19].
From Table 4 we see that the magnetisation values for PIO-1F and PIO-2F with pectin coating are higher than the values found in the literature for air-dried samples.
Sample Saturation magnetization (emu/g) PIO-1A 31 PIO-1F 53 PIO-2A 46 PIO-2F 54 TABLE 4: Magnetisation values for magnetite nanocomposites obtained from different precursors under different synthesis conditions.