Linear X-ray Tube for In-Soil Root Imaging
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Solution Overview
Problem
Current methods for imaging plant roots are limited, as they cannot visualize roots in complex media like soil, and existing imaging technologies such as x-ray, MRI, and PET are not deployable in open agricultural fields, making it difficult to observe and characterize plant root phenotypes in situ.
Innovation Solution
A low-cost, stationary, three-dimensional x-ray computed tomography system using a linear x-ray tube with individually controlled x-ray sources and detectors, capable of imaging plant roots in their native soil environment, providing high-resolution images with large penetration depth and non-destructive measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If visible light cameras are used in rhizotrons to image plant roots, then roots near the glass wall can be observed, but the vast majority of plant roots remain invisible because visible cameras cannot see through soil
Solution Approach 1:
The patent uses x-ray technology as an intermediary that can penetrate through soil and complex media to visualize roots, overcoming the limitation of visible light cameras that cannot see through soil. The x-ray system acts as a mediator between the observer and the roots embedded in complex media.
Solution Approach 2:
The invention changes the imaging parameter from visible light to x-ray radiation, which has different penetration properties. This parameter change enables imaging through complex media like soil, water, and rock, allowing observation of roots in their natural environment without requiring them to be near a glass wall.
2Measurement precision
If x-ray imaging technology is used to image plant roots in soil, then roots can be visualized in complex media, but existing x-ray systems are not deployable in open agricultural fields
Solution Approach 1:
The patent divides the imaging system into separate components: an x-ray source unit and a detector array unit that can be positioned independently on opposite sides of the plant container. This segmentation allows the system to be deployed in field conditions where the source and detector can be placed at convenient locations without requiring a single integrated device.
Solution Approach 2:
The invention transitions from traditional single-sided imaging to a transmission geometry where the x-ray source and detector are positioned in different spatial dimensions (opposite sides of the container). This dimensional arrangement enables x-rays to penetrate through the entire plant-soil system, providing comprehensive root imaging capability suitable for field deployment.
3Reliability
If traditional imaging methods are used to observe plant roots, then non-destructive measurement is achieved, but the methods cannot image roots in their native soil environment
Solution Approach 1:
The patent employs x-ray radiation as an intermediary that can penetrate through soil and water without disturbing the plant root system. This allows non-destructive imaging of roots in their native soil environment, maintaining the reliability of non-destructive measurement while achieving in situ imaging capability.
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 efficient imaging and chemical analysis of plant roots in situ, allowing for the correlation of phenotypes with genetic markers, improving soil carbon accumulation, reducing greenhouse gas emissions, and enhancing water efficiency, with the ability to image hundreds of plants per cycle.
Implementation Method 1
a first one of the N x-ray sources may be activated to emit an x-ray beam
Implementation Method 2
a detector array comprising one or more M (M≥1) individual detectors configured to detect the one or more x-ray beams
Implementation Method 3
Even the best existing imaging modalities such as x-ray, MRI, and PET have limitations when imaging different components of complex media, such as soil containing plant roots, minerals, and rocks
Data Source
AI summary
A linear x-ray tube having one or more x-ray sources is configured for insertion into the soil in proximity to a root system of a plant for emission of an x-ray beam detected by a linear array of one or more x-ray detectors. The linear x-ray tube and detector array may be inserted into rhizotrons previously inserted into the soil. Various combinations of multiple x-ray tubes and/or detector arrays may be utilized to customize the x-ray imaging of the root system.