Dental Imaging Control Using 3D Surface Models for Motion Correction
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Solution Overview
Problem
Traditional dental X-ray imaging methods face challenges in maintaining patient positioning stability, leading to motion artifacts and suboptimal image quality due to unknown anatomical shapes, which affect the accuracy and clarity of dental X-ray images.
Innovation Solution
A controller and imaging system that utilizes optical scanner data to create a three-dimensional surface model, allowing for the detection and reduction of motion artifacts and adjustment of image reconstruction to match anatomical shapes, thereby improving image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If traditional supporting methods (chin rest, static bite stick, head support) are used to position the patient, then the patient positioning can be maintained, but the positioning stability deteriorates due to patient movement during imaging
Solution Approach 1:
The system performs preliminary action by acquiring optical scan data of the patient's face and teeth before the X-ray imaging process. This preliminary 3D model is then used to predict and compensate for motion artifacts during the actual imaging, allowing the system to prepare correction parameters in advance without requiring rigid mechanical restraints that would compromise patient comfort and cooperation.
Solution Approach 2:
The system implements feedback by continuously comparing the predicted motion artifacts (derived from optical scan data) with the actual X-ray images and adjusting the reconstruction parameters accordingly. This closed-loop approach allows real-time correction of motion artifacts while maintaining flexible patient positioning throughout the imaging process.
2Measurement precision
If scout images are used as targeting aid for 3D image, then the imaging accuracy can be improved, but the imaging time increases due to additional scanning phases
Solution Approach 1:
The system merges the functions of scout imaging and 3D imaging by using the optical scanner to simultaneously capture the 3D surface geometry and texture information of the patient's face and teeth. This integrated approach eliminates the need for separate scout X-ray images while providing comprehensive anatomical data for accurate 3D reconstruction and positioning.
Solution Approach 2:
The system creates a digital copy (3D model) of the patient's anatomy using optical scanning technology, which serves as the basis for all subsequent imaging and reconstruction processes. This virtual model replaces the need for multiple physical scout images and allows for rapid, error-free positioning without additional scanning time.
3Ease of manufacture
If an average shape is used for all patients in panoramic imaging, then the imaging process can be simplified, but the image quality deteriorates due to mismatch with actual anatomical shapes
Solution Approach 1:
The system applies local quality by generating patient-specific 3D models of the dental arch and jawbone structures from optical scan data. Instead of using a generic average shape, the system creates customized anatomical models that accurately represent each patient's unique geometry, allowing for optimized imaging parameters and reconstruction algorithms tailored to their specific anatomy.
Solution Approach 2:
The system changes the imaging parameters dynamically based on the patient's actual anatomical measurements derived from optical scanning. The reconstruction algorithms adjust focal trough positioning, beam angle, and other parameters to match the patient's specific geometry, transforming the imaging process from a standardized template approach to a customized parameter adjustment process.
Data Source
AI summary
The invention relates to a controller (106) for dental imaging of an object. The controller comprises: at least one processor (802), and at least one memory (808) including computer program code (814). The at least one memory (808) and the computer program code (814) is configured to, with the at least one processor (802), cause the controller (106) at least to: obtain first image data from an optical scanner unit (104); obtain second image data from a dental X-ray imaging unit (102); produce a first surface model (202) from the obtained first image data, wherein the first surface model (202) represents an optical three-dimensional shape of a surface of a first part of the object; and use the first surface model (202) to process the obtained second image data. The invention relates also to an imaging system (100), a method, a computer program (814), and a computer-readable medium for dental imaging of an object.