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. Author manuscript; available in PMC: 2013 Jun 1.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2012 Dec;59(12):2825–2830. doi: 10.1109/TUFFC.2012/2525

Fig. 1.

Fig. 1

Example of a L(α) curve (dashed line) for an ultrasound beam with low-contrast penetration L0, minimum resolution D0, DOF LR and characteristic resolution DR. RI is equal to the area under L(α). Line 00′ bisects this area and point 0′ is defined such that RI = LR/DR.