Quantitative computed tomography system

Details Quantitative computed tomography system Quantitative computed tomography system

1988-11-29

1991-11-26

Smith, Jerry

Boots, shoes, and leggings

378207, 382 18, 382 53, G06G 760

Patent

active

050687883

ABSTRACT:
A method for measuring the CT numbers of an in vivo tissues includes the steps of calculating a histogram of a region including the tissue, locating a leading edge of a peak within the histogram, substracting CT numbers assumed to result from background and intermixing of tissues, fitting the background-substracted peak to a gaussian distribution, and calculating the mode of the resulting peak. Whe the CT numbers of two different tissues having know densities are measured according to the method of the invention, the CT numbers may be used to obtain a standard for analyzing tissues of unknow density. The method can be implemented by means of a CT scanner, a computer, and appropriate software.

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patent: 4873707 (1989-10-01), Robertson
Stockham et al., Abstract entitled "A Computer Program for the Reproducible Determination of Tissue CT Number", Radiology, vol. 165, (P.) Suppl. RSNA Scientific Program, Nov., 1987.
Anonymous, "QCT and DPA in Osteoporosis", published by Lunar Radiation Corporation, 1986.
Goodsitt et al., "Quantitative Computed Tomography Scanning for Measurement of Bone and Bone Marrow Fat Content A Comparison of Single-and Dual-Energy Techniques Using a Solid Synthetic Phantom", Investigative Radiology, vol. 22, pp. 799-810, Oct. 1987.
Anonymous, Columbia Scientific Incorporated Newsletter, vol. 2, No. 2, No., 1987.

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