CT Combined Phantom Positioning Using Topogram-Based Z Alignment
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Solution Overview
Problem
Existing CT systems require manual alignment of phantoms in the Z direction, leading to increased workload for service engineers during software updates and production line adjustments.
Innovation Solution
A method for determining the longitudinal position of a combined phantom using a topogram, involving scanning, identifying phantoms, smoothing channel quantities, and averaging to automatically align the phantom position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual alignment of phantoms in Z direction is performed, then alignment accuracy can be achieved, but service engineer workload increases
Solution Approach 1:
The system performs automatic phantom alignment by utilizing the topogram data and channel quantity analysis to self-determine the longitudinal position, eliminating the need for manual intervention by service engineers while maintaining alignment accuracy
Solution Approach 2:
The manual mechanical alignment process is replaced with an automated computational method that uses topogram scanning, channel quantity calculation, and curve smoothing algorithms to automatically determine and achieve the correct phantom position
2Ease of operation
If automatic alignment is implemented, then service engineer workload is reduced, but alignment precision may be compromised
Solution Approach 1:
The system uses feedback from the topogram scanning and channel quantity analysis to iteratively determine the longitudinal position, with curve smoothing and threshold comparison providing continuous refinement until the alignment precision requirement is met
Solution Approach 2:
The system performs preliminary scanning and data analysis to establish the topogram and channel quantity curves before final position determination, ensuring that all necessary information is gathered and processed to achieve accurate alignment
3Manufacturing precision
If manual alignment is performed on production line, then alignment quality can be ensured, but production efficiency decreases
Solution Approach 1:
The phantom alignment process performs self-service through automated topogram analysis and position determination, eliminating manual intervention requirements and enabling continuous operation without service engineer involvement
Solution Approach 2:
The manual alignment operation is completely replaced by an automated system that scans the topogram, processes channel quantity data, and automatically positions the phantom, transforming a labor-intensive process into an efficient automated operation
Data Source
AI summary
A method for determining a longitudinal position of a combined phantom, a computer readable storage medium, and a CT device. The method includes: scanning the combined phantom to obtain a topogram thereof. The combined phantom is fixed to a table top, protrudes beyond the table top, is axially parallel to the longitudinal direction, and includes a plurality of phantoms, one of which is a slice phantom. The method further includes identifying the plurality of phantoms on the topogram, and using an axial center of the slice phantom as the longitudinal position of the combined phantom. The longitudinal position is determined by using the topogram of the combined phantom, and a phantom position is aligned automatically.