Calibration and image processing devices, methods and systems

A processor and image data technology, applied in the field of imaging systems, can solve problems affecting image quality, unreliability, and problems in use

Active Publication Date: 2016-01-27
LIGHTLAB IMAGING
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  • Abstract
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Problems solved by technology

Furthermore, the use of software to detect an appropriate zero offset ('z offset') is problematic and unreliable due to the possible presence of multiple closely spaced and similar intensity reflections
Also, as a further complication, since imaging systems and the

Method used

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  • Calibration and image processing devices, methods and systems
  • Calibration and image processing devices, methods and systems
  • Calibration and image processing devices, methods and systems

Examples

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Embodiment Construction

[0064] In part, the present invention relates to various methods of collecting and processing data, such as frames of OCT data. In one embodiment, the frame of OCT data or image data comprises a cross-sectional image generated from a plurality of scan lines obtained using a rotatable intravascular probe. Using the data collection probe, cross-sectional images or other images are generated using interference-based depth measurements made with respect to a sample, such as a blood vessel. One embodiment of the invention relates to a method of calibrating a data collection system, such as an OCT system, for use with a data collection probe. Various types of calibration may be used, such as manual calibration or user triggered automatic calibration using mirrors and motor initiated changes. In part, the present invention relates to a continuous calibration method embodiment that incorporates image processing modules rather than motor adjustments to calibrate frames from pullback a...

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Abstract

In part, the invention relates to systems and methods of calibrating a plurality of frames generated with respect to a blood vessel as a result of a pullback of an intravascular imaging probe being pullback through the vessel. A calibration feature disposed in the frames that changes between a subset of the frames can be used to perform calibration. Calibration can be performed post-pullback. Various filters and image processing techniques can be used to identify one or more feature in the frames including, without limitation, a calibration feature, a guidewire, a side branch, a stent strut, a lumen of the blood vessel, and other features. The feature can be displayed using a graphic user interface.

Description

technical field [0001] The present invention relates to imaging systems, and more particularly, to image data collection probes, data collection systems, optical coherence tomography, and related methods. Background technique [0002] Optical coherence tomography (OCT) is an interferometric imaging technique widely used in ophthalmology, cardiology, gastroenterology and other fields. In interferometric imaging, light from a known and controllable optical path ('reference path') interferes with light returning from an unknown path such that the resulting interferogram can be analyzed to determine ')Information. The interferogram contains depth location information for structures within the sample being analyzed. A specific advantage of OCT is its inherent compatibility with optical fibers, making it a nearly ideal imaging modality for non-invasive or minimally invasive medical procedures. [0003] Typically, for OCT systems, the sample and interferometric path lengths are ...

Claims

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Application Information

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IPC IPC(8): G06T7/00
CPCG06T2207/10101G06T2207/20168G06T7/12G01J9/02G06T7/0012A61B8/12A61B5/0066A61B5/0073A61B5/0084
Inventor 乔尔·M·弗里德曼阿莫·艾尔巴斯欧尼
Owner LIGHTLAB IMAGING
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