| US 7,463,712 B2 | ||
| Scatter correction for x-ray imaging using modulation of primary x-ray spatial spectrum | ||
| Lei Zhu, Stanford, Calif. (US); and Rebecca Fahrig, Palo Alto, Calif. (US) | ||
| Assigned to The Board of Trustees of the Leland Stanford Junior University, Palo Alto, Calif. (US) | ||
| Filed on Nov. 07, 2006, as Appl. No. 11/557,440. | ||
| Claims priority of provisional application 60/802004, filed on May 18, 2006. | ||
| Prior Publication US 2007/0268997 A1, Nov. 22, 2007 | ||
| Int. Cl. G01N 23/00 (2006.01) | ||
| U.S. Cl. 378—7 [378/2] | 12 Claims |
| 1. In x-ray imaging, a method of spatial frequency translating a detected signal from a primary x-ray source for separation
from low frequency scatter radiation signal comprising the steps of:
a) amplitude modulating the x-ray beam from a primary x-ray source thereby creating a side band of a high-frequency primary
signal with frequency equal to the sum of frequency of the modulation and frequency of the x-ray beam,
b) detecting the side band, whereby the side band frequency is spaced from low frequency scatter radiation;
c) estimating a low-frequency primary signal from the detected side band of the high-frequency primary signal; and
d) using the estimated low-frequency primary signal to estimate scatter.
|