Needle Device Re-calibration for Image Overlay Accuracy
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Solution Overview
Problem
The accuracy of overlays between pre-recorded and live images during medical interventions, such as biopsies of small-sized deep-seated lesions, is insufficient due to movement of the patient and inaccuracies in the coordinate system of imaging equipment.
Innovation Solution
An interventional system that combines pre-recorded and live images using local tissue information from a photonic needle device with an optical fiber sensor, which detects tissue features and re-calibrates the coordinate system to enhance overlay accuracy by providing additional information about tissue properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pre-recorded images and live images are overlaid using coordinate system registration, then image overlay is achieved, but overlay accuracy is insufficient due to patient movement and coordinate system inaccuracies
Solution Approach 1:
The system continuously monitors tissue properties via the photonic needle sensor during the intervention and uses this real-time feedback to dynamically re-calibrate the coordinate system registration between pre-recorded and live images, thereby maintaining high overlay accuracy despite patient movement
Solution Approach 2:
The patent replaces traditional mechanical coordinate registration methods with an optical sensing approach using a photonic needle that detects tissue properties (such as scattering coefficients) to establish a new registration framework, achieving higher accuracy by substituting mechanical positioning dependency with optical measurement
2Measurement precision
If a photonic needle with optical fiber sensor is used to detect tissue features, then overlay accuracy is enhanced, but device complexity increases
Solution Approach 1:
The photonic needle is designed as a multi-functional device that simultaneously performs needle guidance, tissue property detection, and coordinate system re-calibration functions, thereby enhancing overlay accuracy without proportionally increasing device complexity through functional integration
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system improves the accuracy of image overlays by using tissue information from the needle device to precisely locate tissue volumes in both pre-operative and live image coordinate systems, allowing for more accurate needle placement during interventions.
Implementation Method 1
The optical fiber may represent a sensor by means of which the needle device may detect features of tissue
Implementation Method 2
The optical fiber may represent a sensor by means of which the needle device may detect features of tissue
Data Source
AI summary
Re-calibration of pre-recorded images during interventions uses an interventional system including an imaging device providing images of an object, a needle device, and a processing device. The needle device includes a sensor for providing data corresponding to tissue properties. The processing device is configured to perform an overlay registration of pre-recorded images and live images provided by the imaging device, utilizing the data from the sensor. Thus, the accuracy of an overlay of images is increased.