X-ray or gamma ray systems or devices – Accessory – Testing or calibration
Patent
1991-11-25
1993-08-10
Porta, David P.
X-ray or gamma ray systems or devices
Accessory
Testing or calibration
378 18, 378 56, G01D 1800
Patent
active
052356280
ABSTRACT:
A phantom for use in calibrating dual energy X-ray absorptiometry and quantitative computed-tomography includes one or more sections which are equivalent to bone to X-rays and which have a shape resembling a lumbar vertebra. Each section includes a substantially cylindrical main body simulating the vertebra centrum, a band simulating the neural arch, and transverse and posterior processes extending from the band. The transverse processes are formed in a define wedge shape which tapers down from its attachment to the neural arch band. The section, or stacked sections, are embedded in a matrix of plastic material equivalent to water or tissue.
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W. A. Kalender, D. Felsenberg, "A Phantom for Standardization and Cross-calibration of Spinal Bone Mineral Measurements by DXA and QCT," Abstract presented at the 8th International Workshop on Bone Densitometry, Bad Reichenhall, Germany, Apr. 28-May 2, 1991, pub. in Osteoporosis Int'l. vol. 1, Jun. 1991, p. 203.
W. A. Kalender, et al., "Cross-calibration Phantom for Spinal Bone Mineral Measurements with Quantitative CT and DXA," Program of the 76th Scientific Assembly and Annual Meeting, Radiological Society of N. America, Chicago, Ill., Nov. 25-30, 1990, 177 (P): p. 306.
W. A. Kalender, et al., "A Cross-Calibration Phantom for Spinal Bone Mineral Measurements In a Multicenter Study," Program of the 1st European Conf. on Biomedical Engineering, Nizza, France, Feb. 19, 1991, pp. 76-77.
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Chu Kim-Kwok
Porta David P.
Wisconsin Alumni Research Foundation
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