Apparatus and method for removing scatter from an x-ray image

X-ray or gamma ray systems or devices – Specific application – Computerized tomography

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378147, 378901, G21K 112, G21K 510

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057712697

ABSTRACT:
Apparatus and method for eliminating scatter effects in x-ray imaging using two-dimensional detector arrays. The apparatus consists of, in physical order, an x-ray source, a front two-dimensional x-ray detector, a beam selector, and a rear two-dimensional x-ray detector. The subject is located between the x-ray source and front detector. The beam selector prevents scatter x-rays from reaching the rear detector. The method simultaneously solves the two interdependent problems of obtaining scatter-free x-ray images and conducting dual-energy x-ray imaging with primary x-ray data. A high-resolution composite image containing primary and scatter x-ray components is read from the front detector. A low-resolution composite image is produced from the high-resolution composite image. A pair of low-resolution primary x-ray dual-energy images is read from the rear detector. Using an improved dual-energy data decomposition method, a low-resolution primary x-ray front detector image is calculated. A low-resolution scatter x-ray image is determined by subtracting the low-resolution primary x-ray front detector image from the low-resolution composite image. The low-resolution scatter x-ray image is interpolated to a high-resolution scatter x-ray image and subtracted from the high-resolution composite image to produce a high-resolution primary x-ray image.

REFERENCES:
patent: 5148455 (1992-09-01), Stein
Lehmann et al., Generalized Image Combinations in Dual KVP Digital Radiography, 8 Medical Physics 659 (Sep./Oct. 1981).
Archer et al., A Laplace Transform Pair Model for Spectral Reconstruction, 9 Medical Physics 844 (Nov./Dec. 1982).
Wahner et al., The Evaluation of Osteoporosis: Dual Energy X-Ray Absorptiometry in Clinical Practice, 14-33 (1994) no month.
Lo et al., Scatter Compensation in Digital Chest Radiography Using the Posterior Beam Stop Technique, 21 Medical Physics 435 ( Mar. 1994).
Lee et al., A New Digital Detector for Projection Radiography, SPIE (Feb. 1995).
Petrone et al., Rare-Earth Scatter Fractions in Chest Radiography, 20 Medical Physics 475 (Mar./Apr. 1993).
Zhao et al., Digital Radiology Using Self-Scanned Readout of Amorphous Selenium, 1896 SPIE Physics of Medical Imaging 114 (1993) no month.
Antonuk et al., Demostration of Megavoltage and Diagnostic X-Ray Imaging with Hydrogenated Amorphous Silicon Arrays, 19 Medical Physics 1455 (Nov./Dec. 1992).
Honda et al., A Technique of Scatter-Glare Correction Using Digital Filtration, 20 Medical Physics 59 (Jan./Feb. 1993).
Floyd et al., Quantitative Scatter Measurement in Digital Radiography Using Photostimulable Phosphor Imaging System, 18 Medical Physics 408 (May./Jun. 1991).
Zhao et al., A Large Area Solid-State Detector for Radiology Using Amorphous Selenium, 1651 SPIE Medical Imaging IV: Instrumentation 134 (1992) no month.
Chan et al., Studies of Performance of Antiscatter Grids in Digital Radiography: Effects on Signal-to-Noise Ratio, 17 Medical Physics 655 (Jul./Aug. 1990).
Honda et al., Method for Estimating the Intensity of Scattered Radiation Using a Scatter Generation Model, 18 Medical Physics 219 (Mar./Apr. 1991).
Archer et al., Laplace Reconstruction of Experimental Diagnostic X-Ray Spectra, 15 Medical Physics 732 (Nov./Dec. 1988).
Cardinal et al., An Accurate Method for Direct Dual-Energy Calibration and Decomposition, 17 Medical Physics 327 (May/Jun. 1990).
Boone et al., An Analytical Model of the Scattered Radiation Distribution in Diagnostic Radiology, 15 Medical Physics 721 (Sep./Oct. 1988).
Wagner et al., Dual-Energy X-Ray Projection Imaging: Two Sampling Schemes for the Correction of Scattered Radiation, 15 Medical Physics 732 (Sep./Oct. 1988).
Vetter et al., Correction for Scattered Radiation and Other Background Signals in Dual-Energy Computed Tomography Material Thickness Measurements, 15 Medical Physics 726 (Sep./Oct. 1988).
Speller et al., Monte Carlo Study of Multiple Scatter Effects in Compton Scatter Sitometry, 15 Medical Physics 707 (Sep./Oct. 1988).
Boone et al., Monte Carlo Simulation of the Scattered Radiation Distribution in Diagnostic Radiology, 15 Medical Physics 713 (Sep./Oct. 1988).
Chuang et al., Comparison of Four Dual Energy Image Deconstruction Methods, 4 Physics in Medicine and Biology 455 (1988) no month.
Seibert et al., X-Ray Scatter Removal by Deconvolution, 15 Medical Physics 567 (Jul./ Aug. 1988).

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