The advantage of this approach is that after removing the clutter, a mask image based on the remaining flow information can be created and MUSIC is performed only on the voxels with high flow value, which would dramatically reduce the total processing time.
At higher flow values, the limited permeability of water at the blood brain barrier becomes apparent.
This makes it possible to exploit information about cross-section geometry limiting, at least partially, the uncertainty in the extrapolation of discharge at higher flow values.
The primary limitation of this approach is in estimating high flow values since tree-ring growth reaches its potential limit during wet years.
At high flow values, however, there is some indication that the data deviate systematically from the line of identity as is to be expected if the permeability of water at the BBB is limited.
In this study, Endoseal showed significantly higher flow values compared with AHplus (P < 0.05) (Fig. 1e).
As the model used to calculate perfusion in this study is not accurate at high flow values, the data for this patient were excluded from the analysis.
Conversely, the NH3 extraction fraction decreases with increasing flow rates, leading to underestimation of perfusion with higher flow values unless of course they are corrected for by the tracer compartment model.
Test results revealed that SLM prepared with anhydrite exhibited the highest initial flow value (∼160 mm) and setting time and the lowest fluidity loss due to the slow dissolution rate of anhydrite compared to other calcium sulfate.
The high heat flow value was estimated to be 61 ± 8 mW/m2 after topographic correction.
