Biomedical Engineering Reference
In-Depth Information
Figure 1.24: The scatterers distribution (a), the corresponding 1D echoes (b),
2D echogram is constructed (c), and the image is smoothed (d).
1.6 Validation of the Image Simulation Model
Once the generic basic model of IVUS image formation is defined, we need to
compare it to real images contrasting expert opinion to test its use. For this
purpose, we defined procedures to extract quantitative parameters that permit
the measurement of the global and local similarities of the images obtained. The
main goal of this simulation is to give a general representation of the princi-
pal characteristics of the image. The comparison of real and simulated images
should be done on the global image descriptors. We concentrated on the dis-
tribution of the gray levels. Data such as transducer dimensions (Fig. 1.14),
the catheter as well as the reticle locations, operation frequency, band width,
