Abstract:
The invention relates to systems and methods for three dimensional imaging of tissue. Systems and methods of the invention receive a three dimensional data set and display a series of coaxial longitudinal images (i.e., each rotationally offset from another around an axis) in sequence, creating a video effect as if the view were scrolling around the tissue.
Abstract:
The invention generally relates to a polarization sensitive optical coherence tomography (OCT) system that includes both polarization maintaining and single mode optical fiber and methods of use thereof. Generally, OCT systems of the invention have a light source and a differential path interferometer that includes a sample arm and a reference arm. A splitter is used to split light from the light source to the sample arm and the reference arm. Reflected light from the sample arm and the reference arm is recombined at a detector. The polarization maintaining fiber is used in the reference arm to ensure that optical field intensity is equalized between two orthogonal detection channels of the OCT system.
Abstract:
The invention relates to systems and methods for three dimensional imaging of tissue. The invention provides systems and methods to provide a representation of tissue from three-dimensional data in the form of a montage of images having an indication of a spatial registration among the images.
Abstract:
The invention generally relates to methods for calibrating an OCT image by comparing a detected location of a feature within the image to an expected location of the feature, calculating a calibration value, and transforming the location of pixels within the image to provide a calibrated image.
Abstract:
The invention generally relates to methods for calibrating an OCT image by comparing a detected location of a feature within the image to an expected location of the feature, calculating a calibration value, and transforming the location of pixels within the image to provide a calibrated image.
Abstract:
The invention relates to systems and methods for three dimensional imaging of tissue. Systems and methods of the invention receive a three dimensional data set and display a series of coaxial longitudinal images (i.e., each rotationally offset from another around an axis) in sequence, creating a video effect as if the view were scrolling around the tissue.
Abstract:
The invention relates generally systems for correcting distortion in a medical image and methods of use thereof. Methods and systems for displaying a medical image of a lumen of a biological structure, generally comprise obtaining image data of a lumen of a biological structure from an imaging device, correcting the image data for translational distortions, in which correcting is accomplished without reference to another data set, and displaying a corrected image.
Abstract:
The invention relates to an apparatus for in vivo imaging. More specifically, the present invention relates to a catheter that incorporates an Optical Coherence Tomography (OCT) system and an Intravascular Ultrasound (“IVUS) system for concurrent imaging of luminal systems, such as imaging the vasculature system, including, without limitation, cardiac vasculature, peripheral vasculature and neural vasculature.
Abstract:
This invention relates generally to the detection of objects, such as stents, within intraluminal images using principal component analysis and/or regional covariance descriptors. In certain aspects, a training set of pre-defined intraluminal images known to contain an object is generated. The principal components of the training set can be calculated in order to form an object space. An unknown input intraluminal image can be obtained and projected onto the object space. From the projection, the object can be detected within the input intraluminal image. In another embodiment, a covariance matrix is formed for each pre-defined intraluminal image known to contain an object. An unknown input intraluminal image is obtained and a covariance matrix is computed for the input intraluminal image. The covariances of the input image and each image of the training set are compared in order to detect the presence of the object within the input intraluminal image.
Abstract:
This invention relates generally to the detection of objects, such as stents, within intraluminal images using principal component analysis and/or regional covariance descriptors. In certain aspects, a training set of pre-defined intraluminal images known to contain an object is generated. The principal components of the training set can be calculated in order to form an object space. An unknown input intraluminal image can be obtained and projected onto the object space. From the projection, the object can be detected within the input intraluminal image. In another embodiment, a covariance matrix is formed for each pre-defined intraluminal image known to contain an object. An unknown input intraluminal image is obtained and a covariance matrix is computed for the input intraluminal image. The covariances of the input image and each image of the training set are compared in order to detect the presence of the object within the input intraluminal image.