Biomedical Engineering Reference
In-Depth Information
(a)
(b)
Figure 1.42:
Ten original IVUS images (a) and the corresponding simulated (b)
images.
The histograms of gray-level differences for each region of interest in the
20 validated frames are displayed in Figs. 1.46 and 1.47. Table 1.6 explains
the distribution center
µ
and the standard deviation
σ
for the gray-level dif-
ference distribution for each simulated region. The minus sign in the mean
values means that the simulated images are brighter than the real images. A
symmetric Gaussian can be seen in the lumen gray-level differences distribu-
tion, with mean
µ
=−
2
.
44 and deviation
σ
=
15
.
13. The intima distribution has
