Biomedical Engineering Reference
In-Depth Information
the case of ultrasound frequency and second to find structures of interest when
the attenuation coefficient is known.
1.6.3.4 The Beam Number Influence
Figure 1.31 shows the appearance of several simulated IVUS images when the
original and intermediate beam numbers are changed. We obtained the best
appearance when the original beam number was 80 and the secondary beam
number was 240. In total, 320 beams were used by the simulation. We can see
that the IVUS appearance in the tangential direction is significantly affected by
(a)
(b)
(c)
(d)
Figure 1.31: Different combinations of original (NH) and intermediate (nh)
beams yield different IVUS appearances.
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