Biopsy Needle Oblique Positioning for 3D Localization
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Solution Overview
Problem
Current biopsy apparatuses require multiple radiographic images to accurately locate a biopsy region, increasing radiation dose and examination time, especially due to the need for skilled operators to switch between imaging modes, which complicates the process and prolongs patient exposure.
Innovation Solution
A biopsy apparatus that combines scout and stereographic image capturing modes to reduce the number of radiographic images needed by using a radiographic image from the scout mode to identify the biopsy region's three-dimensional position, eliminating the need for a second image from the stereographic mode and incorporating a grid to maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple radiographic images are captured in stereographic mode to identify the biopsy region, then the position identification accuracy is improved, but the radiation dose increases
Solution Approach 1:
The patent combines scout mode imaging and stereographic mode imaging into a single integrated system. The scout mode provides a low-dose overview image while the stereographic mode provides angled views for 3D positioning. By merging these two modes, the system achieves accurate biopsy region identification without requiring multiple high-dose stereographic images alone, thus reducing overall radiation exposure while maintaining positioning accuracy.
Solution Approach 2:
The imaging process is segmented into two distinct modes: scout mode for initial positioning and overview, and stereographic mode for precise 3D localization. This segmentation allows the system to use the appropriate imaging mode for each specific task, avoiding unnecessary radiation exposure from using only high-dose stereographic imaging for all purposes.
2Measurement precision
If multiple radiographic images are captured to specify the biopsy region position, then the positioning accuracy is improved, but the examination time increases
Solution Approach 1:
The scout mode imaging is performed as a preliminary action to obtain an overview image and preliminarily identify the biopsy region before performing detailed stereographic imaging. This preliminary action reduces the need for multiple iterative stereographic images, thereby shortening the total examination time while maintaining positioning accuracy.
Solution Approach 2:
By combining scout mode and stereographic mode imaging capabilities in one apparatus, the system can efficiently transition between overview and detailed imaging without requiring separate devices or extensive repositioning, reducing overall examination time while achieving accurate 3D positioning.
3Device complexity
If the biopsy needle is held perpendicular to the radiation reception surface, then the imaging is simplified, but the biopsy needle overlaps with the biopsy region in the radiographic image
Solution Approach 1:
The patent introduces asymmetric positioning of the biopsy needle relative to the radiation reception surface. Instead of holding the needle perpendicular (symmetric) to the surface, it is positioned at an oblique angle. This asymmetric positioning prevents the needle from overlapping the biopsy region in the radiographic image, improving visibility of the biopsy region while maintaining manageable imaging complexity through coordinated movement mechanisms.
4Device complexity
If a grid is removed to simplify the imaging apparatus, then the device complexity is reduced, but the image quality deteriorates
Solution Approach 1:
The grid is designed to be movable rather than fixed, allowing it to be positioned only when needed for high-quality imaging and removed or retracted when not required. This dynamic configuration maintains image quality when the grid is in use while reducing device complexity and obstruction when the grid is removed, achieving a balance between both requirements.
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 the radiation dose and examination time while ensuring high-quality images for accurate biopsy region identification, allowing for more efficient and precise tissue sampling with reduced patient exposure.
Implementation Method 1
a radiation detector for detecting the radiation which has passed through the object and converting the detected radiation into a radiographic image
Implementation Method 2
a scintillator of a radiation detector converts radiation into light
Data Source
AI summary
A biopsy apparatus has a biopsy needle, which faces a radiation reception surface of a radiation detector and is held obliquely to the radiation reception surface by a biopsy needle holding mechanism. The biopsy apparatus includes a radiographic image capturing apparatus for capturing two radiographic images. One of the two radiographic images is produced according to a scout image capturing mode or a stereographic image capturing mode, and the other is produced according to the stereographic image capturing mode.