Method and apparatus for imaging absorbing objects in a scattering medium
First Claim
1. A method of reconstructing an image of a region of interest inside a scattering medium, the method utilizing a map of distribution of the intensity of electromagnetic radiation components scattered from tagged locations within said region of interest, said map corresponding to certain relative positions of at least one source of the electromagnetic radiation (14) and at least one detector (16) of the scattered electromagnetic radiation with respect to one another and with respect to the tagged locations inside the medium the method being characterized in that:
- data indicative of said relative positions of the at least one electromagnetic radiation source and that at least one scattered radiation detector is utilized to provide a mathematical model that presents a relation between a map of distribution of the intensity of electromagnetic radiation components γ
scattered from tagged locations in a medium and a halftone map of an attenuation factor μ
(r), which is a function of spatial variations of scattering and absorption coefficients of the mediums said relation being indicative of a degree of inhomogeneity of at least one of the scattering and absorption coefficients within the medium; and
, said mathematical model is utilized for processing the map of the distribution of the electromagnetic radiation components to thereby obtain a halftone pattern of said region of interest.
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Abstract
A method and processing device are presented for reconstructing an absorption and/or scattering image of a region of interest inside a scattering medium. A mathematical model is provided being representative of a relation between the distribution of the intensity and phase of electromagnetic radiation components scattered from a medium and a certain attenuation factor, which is function of spatial variations of scattering and absorption coefficients of the medium. The mathematical is used for processing a map of distribution of the intensity of electromagnetic radiation components scattered from known locations within the region of interest, thereby producing a halftone pattern of the region of interest.
43 Citations
28 Claims
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1. A method of reconstructing an image of a region of interest inside a scattering medium, the method utilizing a map of distribution of the intensity of electromagnetic radiation components scattered from tagged locations within said region of interest, said map corresponding to certain relative positions of at least one source of the electromagnetic radiation (14) and at least one detector (16) of the scattered electromagnetic radiation with respect to one another and with respect to the tagged locations inside the medium the method being characterized in that:
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data indicative of said relative positions of the at least one electromagnetic radiation source and that at least one scattered radiation detector is utilized to provide a mathematical model that presents a relation between a map of distribution of the intensity of electromagnetic radiation components γ
scattered from tagged locations in a medium and a halftone map of an attenuation factor μ
(r), which is a function of spatial variations of scattering and absorption coefficients of the mediums said relation being indicative of a degree of inhomogeneity of at least one of the scattering and absorption coefficients within the medium; and
,said mathematical model is utilized for processing the map of the distribution of the electromagnetic radiation components to thereby obtain a halftone pattern of said region of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A processing device (32) for use with a measuring apparatus (10), which is operable to detect the intensity of light scattered from tagged locations in a scattering medium, the processing device comprising inter alia a memory utility (38) for storing data indicative of relative positions of at least one light source (14) and at least one detector (16) with respect to one another and with respect to the tagged locations inside the medium as used in said measuring apparatus, and comprising a data processing and analyzing utility (40) for processing input data and generating data indicative of the processing results, the processing device (32) being characterized in that:
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said processing device is operable to utilize said data indicative of the relative positions to create a predetermined mathematical model and store it in the memory utility, said mathematical model presenting a relation between a map of the measured intensities distribution γ and
a halftone map of a certain absorption factor μ
(r), which is a function of the spatial variation of scattering and absorption coefficients of the medium, said relation being indicative of a degree of inhomogeneity of at least one of the scattering and absorption coefficients within the medium; and
said data processing and analyzing utility is responsive to input data coming from the measuring apparatus and being indicative of a map of distribution of the intensity of light scattered from the tagged locations within said region of interest, to apply said mathematical model to said measured data, and thereby obtain a halftone pattern of the region of interest. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification