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Mark-sweep or copying?: a "best of both worlds" algorithm and a hardware-supported real-time implementation
This paper introduces a novel mark-compact algorithm that combines the elegance and simplicity of Baker's copying algorithm with the memory efficiency of mark-sweep algorithms and presents a hardware-supported implementation for real-time applications in the framework of an object-based RISC architecture.
X-ray diffraction imaging system for the detection of illicit substances using pixelated CZT-detectors
The use of energy-dispersive X-ray diffraction (XRD) in security screening applications allows for highest detection and lowest false-alarm rates. So far, only Germanium-detectors have been used in
NuVISION: a Portable Multimode Gamma Camera based on HiSPECT Imaging Module
CZT detector spectral and imaging performance, the FPGA based 3D positioning and the list-mode image reconstruction technique used are described.
Studying Spatial Resolution of CZT Detectors Using Sub-Pixel Positioning for SPECT
CZT detectors are the basic building block of a variety of new SPECT systems. Their modularity allows adapting system architecture to specific applications such as cardiac, breast, brain or small
An autonomous CZT module for X-ray diffraction imaging
We present the development of a CZT-based detection module dedicated to X-ray diffraction imaging. This kind of application requires a good energy and spatial resolution in order to resolve Bragg
Evaluation of a CZT gamma-ray detection module concept for SPECT
A case study is proposed to investigate the system performance of a classical module dimensioning of 5 mm thick CZT with a segmented anode at a 2.5 ×2.5 mm pitch to open the discussion on SPECT collimation and architecture by demonstrating with simulations how a tomographical system dimensioning depends on detector performance.
Design and Evaluation of a Burst Assembly Unit for Optical Burst Switching on a Network Processor
Optical Burst Switching aims at cost-efficient and dynamic provisioning of sub-wavelength granularity by optimally combining electronics and optics to reduce the number of switching decisions in OBS core nodes.
A 256 energy bin spectrum X-ray photon-counting image sensor providing 8Mcounts/s/pixel and on-chip charge sharing, charge induction and pile-up corrections
A new pixel architecture for spectral imaging is presented, exhibiting a 256 bin spectrum per pixel in a single image duration, up to two orders of magnitude higher than previous works.
Exploiting the efficiency of generational algorithms for hardware-supported real-time garbage collection
This paper introduces a hardware write barrier that does not only detect inter-generational pointers, but also executes all related book-keeping operations entirely in hardware, so that the runtime overhead of generational garbage collection is reduced to near zero.
An FPGA-based algorithm to correct the instability of high-resolution and high-flux X-ray spectroscopic imaging detectors
The emergence of CdTe Photon Counting Detectors (PCD) with energy discrimination capabilities opens up new perspectives in X-ray imaging. Medical and security applications require very high fluxes