| US 7,467,892 B2 | ||
| Calibration devices and methods of use thereof | ||
| Philipp Lang, Lexington, Mass. (US); Siau-Way Liew, Pinole, Calif. (US); and Rene Voracek-Vargas, Sunnyvale, Calif. (US) | ||
| Assigned to Imaging Therapeutics, Inc., Redwood City, Calif. (US) | ||
| Filed on Aug. 12, 2004, as Appl. No. 10/917,848. | ||
| Application 10/917848 is a continuation in part of application No. 10/225363, filed on Aug. 20, 2002. | ||
| Application 10/225363 is a continuation in part of application No. 10/086653, filed on Feb. 27, 2002, granted, now 6,904,123. | ||
| Application 10/086653 is a continuation in part of application No. 09/942528, filed on Aug. 29, 2001. | ||
| Claims priority of provisional application 60/228591, filed on Aug. 29, 2000. | ||
| Prior Publication US 2005/0078802 A1, Apr. 14, 2005 | ||
| Int. Cl. G01D 18/00 (2006.01) | ||
| U.S. Cl. 378—207 [378/18; 378/62] | 10 Claims |
| 1. A method of analyzing an x-ray, the method comprising the steps of:
generating a radiographic image comprising at least one calibration phantom, the at least one calibration phantom including
a first material and a second material, the first material having an x-ray attenuation coefficient that decreases more rapidly
with higher x-ray energy than the second material;
comparing the optical density of the first and second material in the image; and
estimating at least one image acquisition parameter based on the comparison.
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