Method and system for determining a lower-bound density of a body
First Claim
1. A method of determining a lower-bound mass-density of a substance within a volume of interest of a body, the method comprising the steps of:
- scanning a volume of interest of said body with radiation from at least one source of radiation in a predetermined number of directions so as to derive for each direction an area having a plurality of projections thereon each representing a cumulative value of a mass of said substance within the volume of interest along a respective one of the projections wherein said areas bound volume elements contained in said body,determining an estimated volume of the body as an intersection of all volume elements bounded by said areas,comparing for each area the sum of all the projections and applying correction as required so as to remove any disparity between said sums and produce a uniform sum in each one of said directions, anddetermining the lower-bound mass-density of the substance of the body as the quotient of the uniform sum divided by the estimated volume.
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Accused Products
Abstract
A method for determining a lower-bound quantity per unit volume of a physical property associated with a body, the property being susceptible to measurement in a plurality of directions. In general, the method comprises the steps of scanning a volume of interest in a predetermined number of directions so as to derive for each direction an area having a plurality of projections thereon each representing a cumulative value of said property within the volume of interest along a respective one of the directions, and determining an estimated volume of the body as the intersection of all volume elements bounded by the derived areas. For each area the sum of all the projections are compared and correction is applied as required so as to remove any disparity between the sums so as to produce a uniform sum in each of the directions. The lower-bound quantity per unit volume of the property of the body is then calculated as the quotient of the uniform sum divided by the estimated volume. A system is also described for determining the lower-bound density of nitrogen using the method according to the invention.
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Citations
30 Claims
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1. A method of determining a lower-bound mass-density of a substance within a volume of interest of a body, the method comprising the steps of:
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scanning a volume of interest of said body with radiation from at least one source of radiation in a predetermined number of directions so as to derive for each direction an area having a plurality of projections thereon each representing a cumulative value of a mass of said substance within the volume of interest along a respective one of the projections wherein said areas bound volume elements contained in said body, determining an estimated volume of the body as an intersection of all volume elements bounded by said areas, comparing for each area the sum of all the projections and applying correction as required so as to remove any disparity between said sums and produce a uniform sum in each one of said directions, and determining the lower-bound mass-density of the substance of the body as the quotient of the uniform sum divided by the estimated volume. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 30)
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16. A system for determining a lower-bound mass-density of a substance in a body, the system comprising:
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scanning means including at least one radiation source, for scanning a volume of interest of said body in a predetermined number of directions so as to derive for each direction an area having a plurality of projections thereon each representing a cumulative value of a mass within the volume of interest along a respective one of the projections, wherein said areas bound volume elements contained in said body, a plurality of sensors responsive to the scanning means and each disposed in relation thereto for detecting the projections in a respective one of said directions, volume determination means coupled to the sensors for determining an estimated volume of the body as an intersection of all volume elements bounded by said areas, comparator means coupled to the sensors for comparing for each area the sum of all the projections and applying correction as required so as to remove any disparity between said sums and produce a uniform sum in each one of said directions, and computing means coupled to the sensors, the volume determination means and the comparator means for determining the lower-bound mass-density of the substance as the quotient of the uniform sum divided by the estimated volume. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of determining a lower-bound value of a physical property per unit volume of a body, the method comprising the steps of:
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scanning a volume of interest of said body with radiation from at least one source of radiation in a predetermined number of directions so as to derive for each direction an area having a plurality of projections thereon each representing a cumulative value of said property within the volume of interest along a respective one of the projections, wherein said areas bound volume elements contained in said body, determining an estimated volume of the body as an intersection of all volume elements bounded by said areas, comparing for each area the sum of all the projections and applying correction as required so as to remove any disparity between said sums and produce a uniform sum in each one of said directions, and determining the lower-bound value of said property of the body per unit volume as the quotient of the uniform sum divided by the estimated volume. - View Dependent Claims (27)
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28. A system for determining a lower-bound value of a physical property per unit volume of a body, the system comprising:
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scanning means including a radiation surce for scanning a volume of interest of said body in a predetermined number of directions so as to derive for each direction an area having a plurality of projections thereon each representing a cumulative value of said property within the volume of interest along a respective one of the projections, wherein said areas bound volume elements contained in said body, a plurality of sensors responsive to the scanning means and each disposed in relation thereto for detecting the projections in a respective one of said directions, volume determination means coupled to the sensors for determining an estimated volume of the body as an intersection of all volume elements bounded by said areas, comparator means coupled to the sensors for comparing for each area the sum of all the projections and applying correction as required so as to remove any disparity between said sums and produce a uniform sum in each one of said directions, and computing means coupled to the sensors, the volume determination means and the comparator means for determining the lower-bound value of said property per unit volume of the body as the quotient of the uniform sum divided by the estimated volume. - View Dependent Claims (29)
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Specification