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. Author manuscript; available in PMC: 2008 Mar 1.
Published in final edited form as: Ultrasound Med Biol. 2007 Mar;33(3):472–482. doi: 10.1016/j.ultrasmedbio.2006.09.005

Table 2.

Image quality summary based on test object experiments for no paddle, TPX 2.5 mm paddle and lexan 375 μm paddle. Beamforming corrections were implemented on all relevant measurements.

Paddle No paddle TPX 2.5 mm Lexan 375 μm
Elevational FWHM (mm) 0.90 +/− 0.17 1.05 +/− 0.18 0.99 +/− 0.18
Elevational FWTM (mm) 2.1 +/− 1.0 2.6 +/− 1.2 2.2 +/− 1.1
Mean sidelobe level (dB) −19.4 −16.2 −15.3
Lateral FWHM (mm) 0.39 ± 0.04 0.40 ± 0.02 0.40 ± 0.03
Lateral FWTM (mm) 0.70 ± 0.07 0.72 ± 0.04 0.81 ± 0.12
Axial FWHM (mm) 0.23 ± 0.03 0.22± 0.02 0.24 ± 0.02
Axial FWTM (mm) 0.48 ± 0.04 0.46 ± 0.02 0.54 ± 0.03
Range lobe levels (dB) −39 ± 3.1 −40 ± 3.5 −30 ± 3.3
Contrast (dB) −23 −20 −20
Average signal strength vs. no paddle (dB) 0 −6.0 −8.3