Automatic X-ray Beam Equalizer

X-ray or gamma ray systems or devices – Beam control – Filter

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Details

378156, G21K 300

Patent

active

057780463

ABSTRACT:
The present invention provides for an improved automatic x-ray beam equalizer. By analyzing an initial low dosage x-ray image of an object, an attenuation pattern can be calculated. An equalization pattern, generated from the attenuation pattern, can then be created in a mask and placed in the path of a full x-ray beam scan in order to properly attenuate the x-ray signal and create a clearer x-ray image of the object.

REFERENCES:
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patent: 4497062 (1985-01-01), Mistretta
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Plewes et al., "A Scanning Equalization System for Improved Chest Radiography," Radiology, 142(3):765-768 (1982).
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Plewes et al., "A Scanning System for Chest Radiography with Regional Exposure Control: Practical Implementation," Med. Phys. 10(5):655-663 (1983).
Vlasbloem et al. "AMBER: A Scanning Multiple-Beam Equalization System for Chest Radiography," Radiology 169(1):29-34 (1988).
Edholm et al., "Primary X-Ray Dodging," Radiology 99(3):694-696 (1971).
Hasegawa et al., "Digital Beam Attenuator Technique For Compensated Chest Radiography," Radiology 159(2):537-43 (1986).
Hasegawa et al., "Geometrical Properties of a Digital Beam Attenuator System," Med. Phys. 14(1):314-21 (1987).
Boone et al., "Filter Wheel Equalization DSA: Simulation Results," Med. Phys. 20(2 Pt1):439-48 (1993).
Boone et al., "Filter Wheel Equalization In Chest Radiography: Demonstration With A Prototype System," Radiology 196(3):845-50 (1995).
Ersahin et al., "A Digital Filtration Technique For Scatter-Glare Correction Based On Thickness Estimation," IEEE Transactions On Medical Imaging 14:587-595 (1995).
Vyborny et al., "Foil Filters For Equalized Chest Radiography," Radiology 151(2):524 (1984).

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