Gantry Rotation and Cooling for Radiological Imaging
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Solution Overview
Problem
Conventional radiological imaging devices face challenges in performing high-quality total body scans due to limitations in radiation absorption, parasitic radiation, and complex construction, leading to poor image quality and increased costs.
Innovation Solution
A radiological imaging device with a gantry rotation apparatus, a cooling system, and a source tilting device, which enables continuous rotation and dynamic scanning, minimizing slippage and heat buildup, and optimizing radiation focus for improved image quality and reduced exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If flat panel sensors are used for total body scanning, then the detection surface area is increased, but the image quality deteriorates due to inability to continuously absorb radiation
Solution Approach 1:
The detector is divided into multiple independent detector elements arranged in a matrix configuration. Each detector element can independently detect radiation and can be individually read out, allowing continuous scanning without requiring the entire large-area detector to be read out simultaneously. This segmentation enables the system to maintain high detection surface area while achieving continuous radiation absorption capability.
Solution Approach 2:
The patent implements dynamic scanning where the radiation source and detector move relative to the patient during image acquisition. The system transitions from static full-frame capture to dynamic line-by-line or region-by-region scanning, enabling continuous radiation absorption while maintaining image quality through temporal integration of multiple detector readings.
2Reliability
If anti-diffusion grids are added to reduce parasitic radiation, then image quality improves, but the radiation dose increases
Solution Approach 1:
The patent applies local quality optimization by using collimators that shape the radiation beam to match the specific anatomical region being scanned. Instead of using broad anti-diffusion grids that attenuate all scattered radiation uniformly, the system selectively directs radiation only where needed, reducing overall radiation dose while maintaining image quality in the region of interest through precise spatial control.
Solution Approach 2:
The patent replaces mechanical anti-diffusion grids with computational methods for scatter correction. Software algorithms process the detected radiation signals to mathematically remove the effects of scattered radiation, eliminating the need for physical grids that increase radiation dose while achieving the same image quality improvement.
3Area of stationary object
If conventional flat panel sensors are used for total body scans, then the detection coverage is extended, but the reconstruction quality deteriorates due to approximation requirements
Solution Approach 1:
The patent implements continuous scanning where the radiation source and detector move smoothly through the patient's body, acquiring data continuously rather than in discrete sequential frames. This continuous data acquisition, combined with overlapping detector fields of view, eliminates gaps between successive images and provides sufficient redundant information for high-quality reconstruction without approximation artifacts.
Solution Approach 2:
The patent transitions from two-dimensional flat panel detection to three-dimensional volumetric scanning by adding the temporal dimension of continuous motion. The moving source-detector system acquires projection data from multiple angles and positions, creating a three-dimensional dataset that enables superior image reconstruction through tomographic techniques, eliminating the approximation problems inherent in sequential 2D imaging.
4Productivity
If the gantry rotation speed is increased for faster scanning, then productivity improves, but slippage increases reducing measurement precision
Solution Approach 1:
The patent implements feedback control for gantry rotation where encoders or other sensing devices continuously monitor the actual rotation position and speed of the gantry. This information is fed back to the control system, which adjusts the motor drive in real-time to compensate for slippage and maintain precise rotational positioning, enabling fast scanning speeds without sacrificing measurement accuracy.
Solution Approach 2:
The patent replaces mechanical slip-prone transmission systems with direct-drive or magnetic coupling mechanisms for gantry rotation. These alternative mechanical approaches eliminate or significantly reduce slippage between driving and driven components, allowing the gantry to rotate at high speeds while maintaining precise positional accuracy through direct force transmission without intermediate friction interfaces.
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
The solution enables high-quality, efficient total body scanning with reduced radiation exposure and lower operational costs, while simplifying the scanning process and improving image reconstruction.
Implementation Method 1
a source suitable to emit radiation on command, such as X-rays
Implementation Method 2
a detector suitable to receive the radiation after it has traversed the portion of the patient to be analyzed and to send a signal suitable to permit visualization
Implementation Method 3
a cooling system configured to cool the source during rotation of the source and the receiving device
Data Source
AI summary
A radiological imaging device includes a gantry defining an analysis zone in which at least a part of a patient is placed, a source that emits radiation that passes through the part of the patient, a detector that receives the radiation when performing at least one of tomography, fluoroscopy, radiography, and multimodality and generates data signals based on the radiation received, and a fluid-fed cooling system adapted to provide cooling for components that generate heat within the gantry.