CT Image Overlay for Inner Sleeve Tip Position in Biopsy
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Solution Overview
Problem
Existing methods for CT-guided biopsies require manual distance measurement each time the positional relationship between the distal end of the outer sleeve and the target changes, which is time-consuming.
Innovation Solution
An image processing apparatus that superimposes and displays a virtual position of the inner sleeve's distal end on the radiation image based on predetermined distance information, using labeling and edge processing to automate the detection of the biopsy needle region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual distance measurement is performed on the radiation image each time the positional relationship changes, then the position of the inner sleeve distal end can be determined, but the process becomes time-consuming
Solution Approach 1:
The patent creates a virtual copy of the inner sleeve protrusion distance and superimposes it on the radiation image. Instead of manually measuring the distance each time, the system generates a virtual position indicator that replicates the expected distal end position based on the outer sleeve position and predetermined protrusion distance, thereby eliminating repeated manual measurements while maintaining accuracy
Solution Approach 2:
The system performs preliminary calculation of the inner sleeve distal end position based on the outer sleeve position and stored protrusion distance information before the user needs to determine the position. By pre-computing and displaying the virtual position, the system eliminates the need for time-consuming manual measurements when the positional relationship changes
2Productivity
If automated detection of biopsy needle region is implemented, then the measurement process is accelerated, but the device complexity increases
Solution Approach 1:
The patent introduces an image processing apparatus as an intermediary between the radiation image and the user. This intermediary automatically detects the biopsy needle region, calculates the inner sleeve distal end position, and displays the virtual position indicator. The automated detection and calculation processes are handled by the intermediary system, which manages the complexity internally while providing simplified results to the user
Solution Approach 2:
The patent replaces manual mechanical measurement processes with automated image processing and computational methods. Instead of physically measuring distances on the image, the system uses pixel coordinate detection, predetermined distance information, and computational geometry to automatically determine positions, thereby increasing productivity while managing complexity through software-based solutions
Data Source
AI summary
A controller performs processing of superimposing and displaying on a CT image a virtual position reached by a distal end of an inner sleeve, based on predetermined distance information from an outer sleeve to the distal end of the inner sleeve in a case where the inner sleeve protrudes from the outer sleeve.