Methods, Systems and Computer Program Products for Processing Images Generated Using Fourier Domain Optical Coherence Tomography (FDOCT)
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Abstract
Methods, systems and computer program products for managing frequency domain optical coherence tomography (FDOCT) image resolution. A spectrum used to acquire an image of a subject is calibrated and default dispersion correction parameters are set. Default dispersion management parameters associated with a region of the image of the subject are also set. The image of the subject is acquires after setting the default dispersion correction parameters and the default dispersion management parameters. A quality of the acquired image is compared to a quality metric for the acquired image. The dispersion correction parameters are adjusted if the quality of the acquired image does not meet or exceed the quality metric for the acquired image. The acquired image is reprocesses based on the adjusted dispersion correction parameters. The steps of comparing, adjusting and reprocessing are repeated until the acquired image meets or exceeds the quality metric for the acquired image.
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Citations
16 Claims
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1. (canceled)
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2. A system for measuring group velocity dispersion of a sample, the system comprising:
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a Fourier domain optical coherence tomography imaging system configured to acquire spectral interference data corresponding to a region of a sample; and a processor coupled to the Fourier domain optical coherence tomography imaging system, the processor configured to; convert the spectral interference data into spatial image data; apply a phase to the spectral interference data to modify a spatial domain image; and compare a first phase expression corresponding to the region of the sample to a second phase expression to derive a measure of group velocity dispersion associated with the sample. - View Dependent Claims (3, 4, 5, 6)
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7. A method for measuring dispersion of a sample, the method comprising
acquiring a spectral interferogram of a region of a sample using a Fourier domain optical coherence tomography system; -
identifying a first frequency-dependent phase expression; combining the first frequency-dependent phase expression with a first spectral interferogram; transforming the combined first frequency-dependent phase expression and the first spectral interferogram to a spatial domain image; optimizing an image quality metric associated with the spatial domain image associated with the first spectral interferogram; identifying a second frequency-dependent phase expression; combining the second frequency-dependent phase expression with a second spectral interferogram; transforming the combined second frequency-dependent phase expression and the second interferogram to a spatial domain image; optimizing an image quality metric associated with the spatial domain image associated with the second spectral interferogram; and computing a difference between the first phase expression and the second phase expression. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A system for imaging a sample having a means for computing a dispersion of the sample, the system comprising:
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a Fourier domain optical coherence tomography imaging system for acquiring spectral interference data corresponding to a region of a sample; a processor coupled to the Fourier domain optical coherence tomography imaging system, the processor configured to convert spectral interference data to spatial image data; means for optimizing a computed spatial domain image by numerically modifying a phase associated with the spectral interference data; and means for comparing the phase associated with the sample to the phase associated with a reference to derive an expression for a group velocity dispersion of the sample. - View Dependent Claims (14, 15)
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16. A computer program product for obtaining values of optimized parameters for a frequency domain optical coherence tomography (FDOCT) system, the computer program product comprising:
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a non-transitory computer readable storage medium having computer readable program code embodied in said medium, the computer readable program code comprising; computer readable program code configured to obtain the optimized parameters based on the following equations;
D1=dD+Ds
D2=dD+Dr
Ds=(D1−
D2)+Dr.wherein D1 equals dispersive terms obtained through image optimization of a sample, D2 equals dispersive terms obtained through image optimization of a reference, dD equals differential dispersion between subject-free reference and sample paths, Ds equals dispersive terms of the sample and Dr equals dispersive terms of the reference.
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Specification