This vector field, termed the wave-front flow field, permits quantitative analysis of the magnitude of rotational activity (vorticity) and focal activity (divergence) at each spatial point.
In computer simulations, incomplete segments of partial rotations coincided with areas of slow conduction characterized by complex, multicomponent electrograms, and variations in assigning activation times at such sites substantially altered mapped mechanisms.Local activation mapping at sites of termination of persistent AF showed repetitive patterns of rotational or focal activity.
The differential loadings were implemented to simulate a signal with more focal activity that decays in topographic space.
(c) Post-radioembolization 90Y PET/CT confirms focal activity within the four small tumors, depicted in high resolution.
Uncommonly, it appears as focal activity, which makes it difficult to discriminate between malignancy and normal bowel tissue.
e, f Delayed anterior planar and fused SPECT/CT parathyroid Sestamibi scan at 2 hours demonstrate persistent focal activity in the right thyroid lobe (white arrows).
The disputers' focal activity appears to have been a form of public debate or persuasion called "disputation" or "distinction drawing" (bian), which often took place in the court of a regional lord or a state sovereign.
For example, in master planning the City of Irvine [Calif.] we have gone to great lengths to ensure our elementary schools and neighborhood parks are contiguous and a focal activity center for each community.
(d 90Y bremsstrahlung SPECT/CT was barely able to detect subtle activity in the larger (arrow) of the four small tumors, but was unable to confirm any focal activity within the other three small tumors due to its low resolution.
Regions of interest (ROIs) were drawn around all these areas of focal activity and counts in the ROIs converted to mCi using a calibration algorithm and activity for all regions summed for the total vascular tracer uptake (Figure 1).
Focal activity is seen in the region of right jaw (arrows) (A,B), which corresponds to soft tissue metastasis in right cheek overlying the masseter muscle, confirmed on a follow-up CT scan (C).
