Alternatively, it could be envisioned to co-register the distribution of a labeled drug or refine the anatomical information or superimpose maps of diffusion or viscoelastic properties using other imaging techniques such as MRI or ultrasound.
Maps of diffusion rates are calculated from a combined analysis of the two images acquired with different b values (b = 0 and b = 1000 s/mm).
The mapping of apparent diffusion coefficients showed a reduction (hypointensity) of apparent diffusion coefficient precisely in the areas undergoing secondary ischaemia during the period of ECoG monitoring, indicating that delayed ischaemic transformation occurs in regions of secondary damage during the time of multiple PID passage.
Among these are evaluation of cardiac function in real time, mapping of water diffusion and temperature in tissue, mapping of organ blood pool and perfusion, functional imaging of the central nervous system, depiction of blood and cerebrospinal fluid flow dynamics, and movie imaging of the mobile fetus in utero.
Figure 13 presents a diffusion map of eGFP diffusion combined with the corresponding H2A-mRFP confocal image.
However, we have to keep in mind that tractography is a method that maps lines of diffusion coherence inside the white matter.
24 patients (13 high grade gliomas and 11 low grade gliomas) underwent IVIM DWI and 3D pCASL imaging before operation; maps of fast diffusion coefficient (D∗), slow diffusion coefficient (D), fractional perfusion-related volume (f), and apparent diffusion coefficient (ADC) as well as cerebral blood flow (CBF) were calculated and then coregistered to generate the corresponding parameter values.
Eddy-current distortions and simple head motion were corrected by applying affine registration of all volumes to a target volume with no diffusion weighting, and three-dimensional maps of the diffusion tensor and the fractional anisotropy (FA) values were calculated using FSL.
Axial and sagittal T2-weighted images (a, b) show a hypointense nodule in the right peripheral prostate with restriction on the apparent diffusion coefficient map of the diffusion-weighted image (c, low signal intensity) and early enhancement on the axial dynamic contrast-enhanced MR image (d, arrowhead).
First, we acquire the diffusion MR images and process them in order to get a map of the diffusion in the brain (A).
