X-ray CT Detector Segmentation for Resolution and Noise Trade-offs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional X-ray CT systems cannot simultaneously acquire both high-resolution and normal-resolution data in a single scan, limiting their ability to balance image noise and processing speed.
Innovation Solution
An X-ray CT apparatus with a scan controller that switches between high-resolution and normal-resolution modes by grouping detection elements, allowing for the simultaneous acquisition of high-resolution and normal-resolution data in one scan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-resolution detection elements are used, then image resolution is improved, but image noise increases and processing speed decreases
Solution Approach 1:
The detection element array is segmented into multiple independent groups, where each group can be independently controlled to operate in either high-resolution mode (individual element reading) or normal-resolution mode (grouped element reading). This segmentation allows different regions of the detector to serve different functional purposes simultaneously.
Solution Approach 2:
The system dynamically switches between high-resolution and normal-resolution modes for different detection element groups based on imaging requirements. The reading-out controller can change the grouping configuration in real-time during a single scan, enabling adaptive resolution adjustment without physical hardware changes.
2Measurement precision
If high-resolution detection elements are used, then image resolution is improved, but processing speed decreases
Solution Approach 1:
The detection element array is segmented into multiple independent groups, where each group can be independently controlled to operate in either high-resolution mode (individual element reading) or normal-resolution mode (grouped element reading). This segmentation allows different regions of the detector to serve different functional purposes simultaneously.
Solution Approach 2:
Instead of processing all detection elements at high resolution, the system applies high-resolution reading only to necessary regions while using normal-resolution reading for other regions. This partial application of high-resolution processing maintains image quality where needed while reducing overall processing burden and improving scan efficiency.
3Measurement precision
If multiple scans are performed to acquire both high-resolution and normal-resolution data, then data quality is improved, but imaging time increases
Solution Approach 1:
The system merges the functions of multiple separate scans into a single scan by simultaneously acquiring both high-resolution data (from individual detection elements) and normal-resolution data (from grouped detection elements) in one imaging operation. This is achieved through the reading-out controller's ability to switch between reading modes for different element groups during the same scan.
Solution Approach 2:
The X-ray detection device is designed with multi-functionality, where the same physical detector array can serve dual purposes: acquiring high-resolution images and acquiring normal-resolution images simultaneously. The reading-out controller provides universal access to both resolution levels from a single detector hardware configuration.
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
Enables the acquisition of both high-resolution and normal-resolution data in a single scan, reducing imaging time and X-ray dose while improving data quality and noise reduction.
Implementation Method 1
a scintillator layer having a planar light guide plate attached to an upper surface of the planar light guide plate
Implementation Method 2
an optical waveguide including a light guide plate and a planar light guide plate
Data Source
AI summary
In one embodiment, an X-ray CT apparatus includes: an X-ray detector equipped with a plurality of detection elements each of which is configured to output an X-ray signal in accordance with X-rays passing through an object; and a scan controller configured to acquire X-ray signals in each of a first mode and a second mode in one scan by switching between the first mode and the second mode, the first mode being a mode of acquiring high-resolution data which are respective X-ray signals outputted from the plurality of detection elements, the second mode being a mode of acquiring normal-resolution data in which X-ray signals outputted from some of the plurality of detection elements are integrated.