Mobile C-Arm CBCT 3D Reconstruction for Medical Image Guidance
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Solution Overview
Problem
Conventional medical imaging systems, such as CBCT, are expensive and not readily available for many medical procedures, leading to inaccuracies in anatomical guidance during procedures due to registration errors between preprocedural and intraprocedural anatomy, especially in dynamic areas like the lungs.
Innovation Solution
A mobile C-arm x-ray imaging apparatus is used for manually operated CBCT imaging, generating 3D reconstructions from manually rotated images and pose data, allowing for cost-effective and accessible high-resolution imaging, compatible with robotic systems for enhanced procedural accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional CBCT imaging systems are used, then high resolution 3D volumetric reconstructions are obtained, but the systems are extremely expensive and not readily accessible
Solution Approach 1:
The patent creates a virtual copy of the CBCT imaging system by implementing software-based reconstruction algorithms that run on standard computing hardware. Instead of requiring expensive dedicated CBCT hardware, the system processes regular X-ray images through computational algorithms to generate 3D volumetric reconstructions, making the capability accessible through software rather than specialized equipment
Solution Approach 2:
The patent replaces the complex mechanical and hardware-based CBCT system with a computational approach. Instead of relying on expensive dedicated imaging hardware, the system uses standard computing platforms with software-based image processing and reconstruction algorithms to achieve 3D visualization, substituting mechanical complexity with computational processing
2Loss of information
If preprocedural 3D models are used for image guidance, then anatomical visualization is provided, but registration errors occur between preprocedural and intraprocedural anatomy
Solution Approach 1:
The patent performs preliminary segmentation and identification of anatomical landmarks during the image reconstruction process itself. By pre-identifying key anatomical structures and establishing reference points during the intraprocedural imaging phase, the system creates an accurate spatial mapping that can be directly used for navigation without requiring subsequent registration steps that introduce errors
Solution Approach 2:
The system provides real-time feedback by continuously updating the 3D reconstruction and anatomical guidance during the procedure. This allows dynamic adjustment and verification of anatomical positioning, enabling the physician to confirm accurate tool placement relative to target structures without relying on static preprocedural models that may have registration errors
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
This approach reduces costs, increases accessibility of CBCT imaging, and improves the accuracy and efficiency of medical procedures by providing real-time, high-resolution 3D anatomical guidance, reducing registration errors and enhancing tool placement precision.
Implementation Method 1
a mobile C-arm x-ray imaging apparatus is used for manually operated CBCT imaging, generating 3D reconstructions from manually rotated images and pose data
Data Source
AI summary
Systems, methods, and devices for medical imaging are disclosed herein. In some embodiments, a system for imaging an anatomic region includes one or more processors, a display, and a memory storing instructions that, when executed by the one or more processors, cause the system to perform various operations. The operations can include generating a 3D reconstruction of an anatomic region from first image data obtained using an imaging apparatus, and identifying a target structure in the 3D reconstruction. The operations can also include receiving second image data of the anatomic region obtained using the imaging apparatus, and receiving pose data of an imaging arm of the imaging apparatus. The operations can further include outputting, via the display, a graphical representation of the target structure overlaid onto the second image data, based on the pose data and the 3D reconstruction.