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Project
System Electronics
Application
Volumetric CT/PET/SPECT Diagnostic System
Customer Need
Electronics to detect and collect sensor data from a large photo-sensor array excited by X-rays. Unique requirements were pixel sizes eight times smaller than previous generation systems as well as a large XY array instead of the prior single slice.
AVID's Solution
In addition to the quantity and execution speed that pushed the electronic design, there were also major challenges from power, signal distribution, and thermal management that needed to be addressed. Advanced packaging was required to achieve the circuit density, and special consideration for the mechanical design included the ability to remove heat from the electronics. A mass amount of parallel signal processing was implemented as stand-alone subassemblies with dedicated ASICs, DSPs, communication interfaces to centralized memory arrays, and power conversion. The memory data on the rotor side was then organized and packed for transmission across the rotating interface and stored on the stator side for use by the post processing imaging engines. The front end processing subassemblies provided a means for modular testing and system maintenance.
Value Added or Technologies Applied
- Electronic System Requirements/Architecture
- Data Flow Diagrams. Memory Architecture and Management, Speed Performance Analysis
- Hardware Design; Advanced Packaging Concepts (Ceramic Carriers, COB, Rigid/Flex)
- In-Line Real-Time Signal Processing and Combination, VHDL and DSP Techniques
- Thermal Management; Fluid-Based and Thermo-Electric Cooling
- High-Speed Data Transfer Method (20GBps) Across a Rotating Interface
- Proof of Concept Modeling
- Manufacturing Techniques and Process Research/Definition
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