BrainPET Insert Electronics Extraction for MRI Noise Reduction
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Solution Overview
Problem
Integrated PET-MRI systems face challenges with electronics generating heat and electromagnetic noise, reducing MRI bore diameter and interfering with imaging, especially when retrofitting existing MRI systems for simultaneous brain imaging.
Innovation Solution
A BrainPET System comprising a PET insert with a receive and transmit coil within a PET ring, allowing the electronics to be positioned outside the MRI bore, connected via copper cabling, and a workstation for signal processing outside the MRI room, minimizing exposure to the magnetic field and reducing noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If electronics are positioned inside the MRI bore to amplify and process PET detector signals, then signal processing capability is improved, but electromagnetic noise interference with MRI imaging increases
Solution Approach 1:
The patent extracts the electronics from the MRI bore and positions them in an external equipment rack. This separation removes the source of electromagnetic noise from the sensitive MRI imaging environment while maintaining all necessary signal processing functions through cabled connections.
Solution Approach 2:
The patent introduces copper cabling as an intermediary to transmit PET detector signals from inside the MRI bore to the external electronics. This mediator enables signal processing outside the bore without requiring physical presence of electronics in the magnetic field, thus eliminating electromagnetic interference.
2Power
If electronics are positioned inside the MRI bore, then signal amplification and digitization can be performed, but heat generation requires additional cooling systems
Solution Approach 1:
The patent extracts the heat-generating electronics from the confined MRI bore environment and relocates them to an external equipment rack with adequate space for thermal management. This allows the use of simpler cooling methods such as air cooling with fans instead of requiring complex liquid cooling systems within the bore.
3Device complexity
If electronics are positioned inside the MRI bore, then signal processing is integrated, but the bore diameter available for patients is reduced
Solution Approach 1:
The patent removes the electronics from the MRI bore, thereby maximizing the bore diameter available for patient positioning and comfort. All signal processing functions are maintained through external equipment connected via cabling, eliminating the space occupation issue.
Solution Approach 2:
The patent segments the PET-MRI system into distinct functional modules: the PET detector ring inside the bore, the MRI system, and the electronics in an external rack. This segmentation allows each component to be optimized independently, with the bore diameter determined solely by imaging requirements rather than electronics space requirements.
4Measurement precision
If a PET system with smaller inner bore size is built for retrofitting, then spatial resolution for brain imaging is improved, but the system cannot be integrated with existing MRI systems
Solution Approach 1:
The patent extracts the electronics from the integrated system architecture, allowing the PET detector ring to be independently configured with optimal dimensions for brain imaging. The cabled connection approach enables the PET system to be retrofitted to existing MRI systems without requiring a completely integrated design.
Solution Approach 2:
The patent creates a flexible, adaptable system where the PET detector ring can be independently positioned and configured within the MRI bore. The external electronics can be connected via cables of appropriate length, allowing the system to adapt to different MRI system configurations and patient positioning requirements.
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 simultaneous MRI and PET brain imaging with improved spatial resolution and sensitivity, allowing for flexible use of existing MRI systems and reducing the impact of magnetic fields on PET scanner functionality.
Implementation Method 1
a transmit coil and a receive coil positioned within a PET ring
Implementation Method 2
a transmit coil and a receive coil positioned within a PET ring
Implementation Method 3
electronic data acquisition systems are used to convert the analog output of the PET pixels into digital outputs
Data Source
AI summary
In order to improve both spatial resolution and sensitivity for brain research and clinical activity, we have designed a combined PET/MRI insert for brain scanning, referred to herein as a “BrainPET insert” that can be fit onto and into a suitable MRI system. The BrainPET Insert comprises, in order, a receive (Rx) coil positioned within and adjacent to a transmit (Tx) coil and a PET ring, wherein both the Rx coil and the Tx coil are within the PET ring.