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A high voltage mixed signal ASIC is described that provides multiple fully programmable clock outputs capable of driving large format CCD capacitive electrodes. The COMET ASIC provides 6 independent clock buffering channels each with individually programmable rising/falling current drive and high/low voltage levels. Output voltage levels are controlled with integrated fast response regulators that...
A 128-channel event-driven ASIC is described which reads out the R3B (Reactions with Relativistic Radioactive Beams) silicon micro vertex tracker. Ionizing particles with energies in the range of 40keV-50MeV are detected, digitized and read out with 12 bit resolution, and time stamped with up to 5ns precision. The ASIC copes with signal charges and detector leakage currents of both polarities and...
A segmentation algorithm that assists material analysis in multi-energy computed tomography is presented. Segmentation is typically used in conjunction with quantitative material analysis algorithms (known as material decomposition) to increase the total number of materials which can be discriminated and quantified. The algorithm illustrated here identifies voxels (in the image domain) with one of...
Simultaneous dual-tracer brain imaging has the potential to shorten patient pathways in the diagnosis of neurodegenerative diseases, but the poor spectral resolution of conventional gamma cameras limits the utility of this technique. Solid state detectors offer improved capability to distinguish between two radioisotopes, but the technology has yet to be fully evaluated in the field of scintigraphic...
Modern smart phones are now capable of gathering information about a user's social interactions. The authors have developed and deployed Nodobo, a suite of social sensor software for Android. Our first study group is a class of senior high school students, each using a Google Nexus One mobile phone running Nodobo, which we use to capture their device usage patterns and social interactions. We provide...
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