Systems and methods for imaging fluorophores
First Claim
1. A system for imaging fluorophores in a turbid medium comprising:
- an illumination source that illuminates the fluorophores with diffuse photon density waves of a first specified wavelength, thus causing the fluorophores to fluoresce re-radiated diffuse photon density waves of a second wavelength after being illuminated with the diffuse photon density waves of the first specified wavelength;
a detector that detects the re-radiated diffuse photon density waves of the second wavelength, wherein there is a phase shift between the diffuse photon density waves of the first wavelength and the diffuse photon density waves of the second wavelength; and
a processor interfaced with the detector that processes data corresponding to the phase shift and the amplitude of the re-radiated waves to determine concentration and lifetime of the fluorophores as a function of spatial position in the turbid medium.
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Abstract
The systems comprise source means for illuminating the fluorophores with diffuse photon density waves of a first specified wavelength, whereby the fluorophores will fluoresce re-radiated diffuse photon density waves of a second wavelength after being illuminated with the diffuse photon density waves of the first specified wavelength; detection means for detecting the re-radiated diffuse photon density waves of the second wavelength, wherein there is a phase shift between the diffuse photon density waves of the first wavelength and the diffuse photon density waves of the second wavelength; and processing means interfaced with the detection means for processing data corresponding to the phase shift and the amplitude of the re-radiated waves to determine concentration and lifetime of the fluorophores as a function of spatial position of the fluorophores in the turbid medium.
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Citations
16 Claims
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1. A system for imaging fluorophores in a turbid medium comprising:
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an illumination source that illuminates the fluorophores with diffuse photon density waves of a first specified wavelength, thus causing the fluorophores to fluoresce re-radiated diffuse photon density waves of a second wavelength after being illuminated with the diffuse photon density waves of the first specified wavelength;
a detector that detects the re-radiated diffuse photon density waves of the second wavelength, wherein there is a phase shift between the diffuse photon density waves of the first wavelength and the diffuse photon density waves of the second wavelength; and
a processor interfaced with the detector that processes data corresponding to the phase shift and the amplitude of the re-radiated waves to determine concentration and lifetime of the fluorophores as a function of spatial position in the turbid medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method imaging a fluorophores in a turbid medium comprising the steps of:
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illuminating the fluorophores with diffuse photon density waves of a first specified wavelength;
allowing the fluorophores to fluoresce, thereby re-radiating a diffuse photon density wave having a second wavelength and an amplitude;
detecting the re-radiated diffuse photon density wave having the second wavelength and amplitude wherein there is a phase shift between the diffuse photon density wave of the first wavelength and the diffuse photon density wave of the second wavelength; and
analyzing the phase difference and the amplitude to determine concentration and lifetime of the fluorophores as a function of spatial position in the turbid medium. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification