X-ray or gamma ray systems or devices – Beam control – Antiscatter grid
Patent
1997-06-19
1999-09-07
Church, Craig E.
X-ray or gamma ray systems or devices
Beam control
Antiscatter grid
378145, G21K 100
Patent
active
059498501
ABSTRACT:
Methods for making large area grids consisting of focused and unfocused holes in sheets of metal. The grid consists of thin metal walls surrounding hollow openings. The projection of all walls converge to a focal spot in the focused grid, and on parallel or substantially parallel in an unfocused grid. A grid having a large area is made by interlocking together smaller grid pieces. A tall device is made by stacking layers of focused grids. Methods to make unfocused grids that detect parallel incoming x-rays are also described. The opening of the grid can be filled with phosphor or other scintillating materials to make a integrated grid/scintillator structure. These grids can also be applied to many applications such as x-ray antiscatter for diagnostic medical imaging, non-destructive testing, x-ray collimation, filters for liquids or electromagnetic radiation.
REFERENCES:
E.W. Becker et al., "Fabrication of Microstructures with high aspect ratios and great structural heights by syncrotron Radiation Lithography, Galvanoforming, and Plastic Molding (LIGA Process)," Microelectronics Engineering, vol. 4 pp. 35-56 (1986).
Dr. P. Bley, "The Liga Process for Fabrication of Three-Dimensional Microscale Structures," Interdisciplinary Sci. Rev., vol. 18, pp. 267-272 (1993).
"DARPA Awards Contract for X-Ray Lirthography System", Micromachine Devices, vol. 2, No. 3, p. 2 (1997).
R.L. Egan, "Intramammary Calcifications Without an Associated Mass", Radiology, vol. 137, pp. 1-7 (1980).
H. Guckel, program and notes describing his "Invited talk at the American Vacuum Society Symposium", Philadelphia, PA, Oct. 1996.
"IBM Team Develops Ultrathick Negative Resist for MEMs Users", Micromachine Devices, vol. 2, No. 3, p. 1 (1997).
"X-Ray Lithography Scanners for LIGA", Micromachine Devices, vol. 1, No. 2, p. 8 (1996).
E.P. Muntz et al., "On the Significance of Very Small Angle Scattered Radiation to Radiographic Imaging at Low Energies", Med. Phys. vol. 10, pp. 819-823 (1983).
M.J. Yaffe et al., "X-Ray Detectors for Digital Radiography", Phys. Med. Biol., vol. 42, pp. 1-39 (1997).
H. Guckel, "NATO Advanced Research Workshop on the Ultimate Limits of Fabrication and Measurement", Proceedings of the Royal Society (Invited Talk/Paper), pp. 1-15 (Apr. 1994).
H. Guckel et al., "Micromechanics via x-ray assisted processing", Journal of Vaccuum Science Technology, pp. 2559-2564 (Jul./Aug. 1994).
W. Ehrfeld, "Coming to Terms with the Past and the Future", LIGA News, pp. 1-3 (Jan. 1995).
H. Guckel et al., "Micro Electromagnetic Actuators Based on Deep X-Ray Lithography", MIMR '95, Sendai, Japan, (Sep. 27-29, 1995).
H. Guckel et al., "Micromechanics for actuators via deep x-ray lithography", Proceedings of SPIE, Orlando, Florida, pp. 39-47 (Apr. 1994).
Z. Jing et al., "Imaging characteristics of plastic scintillating fiber screens for mammography", SPIE, vol. 2708, pp. 633-644 (Feb. 1996).
N. Nakamori et al., "Computer simulation on scatter removing characteristics by grid", SPIE vol. 2708, pp. 617-625 (Feb. 1996).
P. A. Tompkins et al., "Use of capillary optics as a beam intensifier for a Compton x-ray source", Medical Physics, vol. 21, No. 11, pp. 1777-1784 (Nov. 1994).
R. Fahrig et al., "Performance of glass fiber antiscatter devices at mammographic energies", Am. Assoc. Phys, Med., vol. 21, No. 8, pp. 1277-1282 (Aug. 1994).
L.E. Antonuk et al., "Large Area, Flat-Panel, Amorphous Silicon Imagers", SPIE vol. 2432, pp. 216-227 (Jul. 1995).
H. E. Johns, OC, Ph.D., F.R.S.C., LL.D., D.Sc., F.C.C.P.M., The Physics of Radiology, Fourth Edition (Charles C. Thomas: Springfield, Illinois, 1983), p. 734.
Collimated Holes, Inc. products manual, pages entitled "Rectangular and Square Fibers/Fiber Arrays" (Apr. 1995) and "Scintillating Fiberoptic Faceplate Price List Type/LKH-6" (Dec. 1995).
H. Guckel, "LIGA and LIGA-Like Processing with High Energy Photons", Microsystems Technologies, vol. 2, No. 3, pp. 153-156 (Aug. 1996).
H. Guckel, "Deep X-Ray Lithography for Micromechanics and Precision Engineering", Synchrotron Radiation Instrumentation (Invited), Advanced Photon Source Argonne, pp. 1-8 (Oct. 1995).
Church Craig E.
Creatv MicroTech, Inc.
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