| US 7,522,780 B2 | ||
| Frequency domain processing of scanning acoustic imaging signals | ||
| Michael G. Oravecz, Naperville, Ill. (US); Lei Pen, Aurora, Ill. (US); Lawrence W. Kessler, Buffalo Grove, Ill. (US); and Zhiqu Guo, Prospect Heights, Ill. (US) | ||
| Assigned to Sonoscan, Inc., Elk Grove Village, Ill. (US) | ||
| Filed on Mar. 24, 2005, as Appl. No. 11/88,668. | ||
| Application 11/088668 is a division of application No. 10/007984, filed on Nov. 13, 2001, granted, now 6,890,302. | ||
| Claims priority of provisional application 60/248138, filed on Nov. 13, 2000. | ||
| Prior Publication US 2005/0240106 A1, Oct. 27, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G06K 9/40 (2006.01) | ||
| U.S. Cl. 382—260 [382/255; 382/280; 600/407] | 77 Claims |
| 1. An acoustic micro imaging method useful in the inspection of a target, comprising:
scanning the target with a focused pulsed acoustic beam;
sensing the pulsed beam after it has been modified by interaction with the target and producing a time-domain signal indicative
of the modifications; and
processing said time-domain signal to produce a frequency domain representation of frequency selective modifications to the
pulsed acoustic beam produced by said interaction with said target, said frequency domain representation further comprising
a plurality of pixels where each pixel's brightness is amplitude modulated by a phase component of the sensed pulsed beam
from a respective portion of the target.
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