DETERMINATION OF HEAVY PARTICLE STOPPING POWER
First Claim
1. A system for determining a distribution of heavy particle stopping power of a patient, the system comprising:
- a broadband source of dual-energy x-rays, the broadband source configured to;
produce a beam of broadband x-ray radiation, the broadband beam including energy having a first energy spectrum and a first peak energy and energy having a second energy spectrum and a second peak energy, andirradiate a three-dimensional space within a patient with the beam of broadband x-ray radiation;
a detector system comprising a sensor configured to;
sense radiation from the three-dimensional space, the sensed radiation including radiation caused by irradiating the three-dimensional space with the broadband source, andproduce a representation of the sensed radiation; and
a processor operable to;
receive the representation of the sensed radiation,determine a distribution of effective atomic number of the three-dimensional space based on the representation from the detector system,determine a distribution of an x-ray stopping power of the three-dimensional space based on the representation from the detector system, the x-ray stopping power of the three-dimensional space being an indication of a depth of penetration of an x-ray incident on the three-dimensional space,apply a conversion to the distribution of the x-ray stopping power and the distribution of the effective atomic number, andgenerate a distribution of a heavy particle stopping power of the three-dimensional space based on the conversion, the heavy particle stopping power being used to indicate a depth of penetration for a heavy particle incident on the three-dimensional space.
1 Assignment
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Accused Products
Abstract
A distribution of heavy particle stopping power is be determined. A distribution of effective atomic number of a three-dimensional space is accessed, and a distribution of an x-ray stopping power of the three-dimensional space is accessed. A conversion is applied to the distribution of the effective atomic number and the distribution of x-ray stopping power. A distribution of the heavy particle stopping power of the three-dimensional space is generated based on the conversion, the heavy particle stopping power being an indication of a depth of penetration for a heavy particle incident on the three-dimensional space.
53 Citations
23 Claims
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1. A system for determining a distribution of heavy particle stopping power of a patient, the system comprising:
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a broadband source of dual-energy x-rays, the broadband source configured to; produce a beam of broadband x-ray radiation, the broadband beam including energy having a first energy spectrum and a first peak energy and energy having a second energy spectrum and a second peak energy, and irradiate a three-dimensional space within a patient with the beam of broadband x-ray radiation; a detector system comprising a sensor configured to; sense radiation from the three-dimensional space, the sensed radiation including radiation caused by irradiating the three-dimensional space with the broadband source, and produce a representation of the sensed radiation; and a processor operable to; receive the representation of the sensed radiation, determine a distribution of effective atomic number of the three-dimensional space based on the representation from the detector system, determine a distribution of an x-ray stopping power of the three-dimensional space based on the representation from the detector system, the x-ray stopping power of the three-dimensional space being an indication of a depth of penetration of an x-ray incident on the three-dimensional space, apply a conversion to the distribution of the x-ray stopping power and the distribution of the effective atomic number, and generate a distribution of a heavy particle stopping power of the three-dimensional space based on the conversion, the heavy particle stopping power being used to indicate a depth of penetration for a heavy particle incident on the three-dimensional space. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for determining a distribution of heavy particle stopping power of a patient, the system comprising:
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a broadband source of x-rays configured to; produce a single beam of broadband x-ray radiation having an energy spectrum and a peak energy, and irradiate a three-dimensional space within a patient with the beam of broadband x-ray radiation; a dual-energy detector system comprising a first sensor including a first sensor relatively more sensitive to a first band of energies included in the broadband x-ray radiation, and a second sensor relatively more sensitive to a second band of energies included in the broadband x-ray radiation, the second band of energies being higher than the first band of energies, and the sensor being configured to; sense radiation from the three-dimensional space, the sensed radiation including radiation caused by irradiating the three-dimensional space with the broadband source, and produce a representation of the sensed radiation; and a processor operable to; receive the representation of the sensed radiation, determine a distribution of effective atomic number of the three-dimensional space based on the representation from the detector system, determine a distribution of an x-ray stopping power of the three-dimensional space based on the representation from the detector system, the x-ray stopping power of the three-dimensional space being an indication of a depth of penetration of an x-ray incident on the three-dimensional space, apply a conversion to the distribution of the x-ray stopping power and the distribution of the effective atomic number, and generate a distribution of a heavy particle stopping power of the three-dimensional space based on the conversion, the heavy particle stopping power being used to indicate a depth of penetration for a heavy particle incident on the three-dimensional space.
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12. A computer-readable storage medium storing instructions, that when executed, cause a processor to perform the following operations:
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access data reflecting an interaction between a broadband x-ray beam and a three-dimensional space of a patient, the broadband x-ray beam including a first energy band having a first energy spectrum and a first peak energy, and a second energy band having a second energy spectrum and a second peak energy higher than the first peak energy; analyze the accessed data to determine an interaction between the three-dimensional space and the first energy band and an interaction between the three-dimensional space and the second energy band; determine a distribution of effective atomic number of a three-dimensional space based on the interactions between the three-dimensional space and the first and second energy bands; access a distribution of x-ray stopping power of the three-dimensional space; apply a conversion to the distribution of the effective atomic number and the distribution of the x-ray stopping power of the three-dimensional space; and generate, based on the conversion, a heavy particle distribution that represents a heavy particle stopping power of the three-dimensional space, the heavy particle stopping power being used to indicate a depth of penetration for a heavy particle incident on the three-dimensional space. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A computer-readable storage medium storing instructions, that when executed, cause a processor to perform the following operations:
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access a distribution of effective atomic number of a three-dimensional space; access a distribution of an x-ray stopping power of the three-dimensional space; apply a conversion to the distribution of the effective atomic number and the distribution of x-ray stopping power; and generate a distribution of the heavy particle stopping power of the three-dimensional space based on the conversion, the heavy particle stopping power being an indication of a depth of penetration for a heavy particle incident on the three-dimensional space. - View Dependent Claims (21, 22)
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23. A method for determining a distribution of heavy particle stopping power, the method comprising:
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accessing a distribution of effective atomic number of a three-dimensional space; accessing a distribution of an x-ray stopping power of the three-dimensional space; applying a conversion to the distribution of the effective atomic number and the distribution of x-ray stopping power; and generating a distribution of the heavy particle stopping power of the three-dimensional space based on the conversion, the heavy particle stopping power being an indication of a depth of penetration for a heavy particle incident on the three-dimensional space.
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Specification