A Basic Model for IVUS Image Simulation - Biomedical Image Analysis - page 15

Figure 1.12: The functional dependency between the axial resolution and the
ultrasound frequency for a rank of typical ultrasound speeds (see Table 1.1) in
biological tissue. The typical IVUS (30 MHz) frequency as well as the tolerance
in the axial resolution d r are emphasized.

1.4.1.2 Angular Resolution

Angular resolution is the capacity to discern two objects or events located in
the tangential direction [13, 14, 16] and depends on the beam width. The beam

Table 1.1: Sound speed in selected

tissues [16]

Material Sound speed (m/sec)

Fat 1460

Aqueous humor 1510

Liver 1555

Blood 1560

Kidney 1565

Muscle 1600

Lens of eye 1620

Average 1553