Boots – shoes – and leggings
Patent
1985-11-15
1989-06-06
Smith, Jerry
Boots, shoes, and leggings
378 18, G01D 1800
Patent
active
048376868
ABSTRACT:
A system and method is disclosed for utilizing image pixel value information generated by a digital radiographic system for quantifying the amount of calcium in a particular object of interest within a subject, wherein the subject also contains additional quantities of calcium located at positions such that the additional calcium interfers with the acquisition of data describing the object of interest. A cursor configured as a parallelogram is described and pixel values are summed along lines parallel to the sides of the parallelogram. A profile is generated from these summations. A portion of the profile corresponding to pixel lines not intersecting the object of interest is used to estimate the contribution of background and other calcium to the profile as a whole, and this estimated value is subtracted from the total profile. Integration of the remainder of the profile provides a scalar value corresponding to the amount of calcium in the object of interest.
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patent: 4663772 (1987-05-01), Mattson et al.
O'Keefe, M. E., "Calcification in Solitary Nodules of the Lung".
Joseph, P. M., "An Improved Algorithm for Reprojecting Rays Through Pixel Images".
"Principles of Interactive Computer Graphics", McGraw-Hill, pp. 22-25.
Kruger, R. A., "Dual Energy Film Subtraction Technique for Detecting Calcification in Solitary Pulmonary Nodules".
Tarver, R. D., "Experimental Lung Nodule Model: CT Numbers, Nodule Size, and Actual Calcium Content".
Siegelman, S. S., "CT of the Solitary Pulmonary Nodule".
Barnes Gary T.
Lauro Karen L.
Sones Richard A.
Tesic Mike M.
Meyer Charles B.
Picker International
Smith Jerry
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