A Building Block for Nuclear Medicine Imaging Systems Data Acquisition

Lewellen, T.K.; DeWitt, Dawn E.; Miyaoka, Robert S.; Hauck, Scott

doi:10.1109/tns.2013.2295037

Cited by 12 publications

(5 citation statements)

References 22 publications

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“…The detector block will be based on a monolithic scintillator crystal coupled to a SiPM array in a row-column summing readout scheme. All the signals from the readout will be digitized and processed onto a single FPGA device ( figure 7) and their sum will be employed for energy calculation and timing pick-off [41]. In a complete PET system, an external clock is sent to the FPGAs through splitters to synchronize clock and start times for each FPGA [42].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of digital methods for energy calculation and timing pick-off in positron emission tomography

2018

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Traditionally, pulse processing in Positron Emission Tomography (PET) has been based on analog or discrete circuits forming a decentralized processing system. However, there is a convergence for digital and integrated implementations due to the characteristics of the modern electronic devices which are real-time processing capable, such as Application-Specific Integrated Circuit (ASIC) and Field Programmable Gate Array (FPGA) with fast Analog to Digital Converters (ADC). However, FPGA can provide fast implementation at relatively low cost and also enables the development of sophisticated digital pulse processing algorithms to improve energy, position and time resolutions in PET systems. Our group has developed and evaluated one energy calculation and three timing pick-off methods for implementation onto an FPGA-based system. For a typical PET detector setup, our charge integration method presents energy resolution similar to previously designed PET detectors. The best performance for timing pick-off was achieved by the Initial Rise Interpolation (IRI) method, where a coincidence time resolution of around 440 ps is suitable for Time of Flight (TOF) PET. Future works include embedding the proposed algorithms in a FPGA-based data acquisition system under development by our group which will be employed in a PET prototype.

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Section: Discussionmentioning

confidence: 99%

Evaluation of digital methods for energy calculation and timing pick-off in positron emission tomography

2018

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“…String compactifications with (2, 0) worldsheet supersymmetry, in general, do not need to possess an SO(10) GUT symmetry. The right-moving gauge symmetry may remain entirely unbroken; it can be broken to smaller subgroups; or it can be realised as a higher level Kac-Moody algebra [40]. In the case of the ten dimensional theories, it was argued in [3] that all the ten dimensional theories are indeed connected by interpolations or orbifolds.…”

Section: Lower Dimensional Constructionsmentioning

confidence: 99%

String phenomenology from a worldsheet perspective

Faraggi

2019

Eur. Phys. J. C

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I argue that the ten dimensional non-supersymmetric tachyonic superstrings may serve as good starting points for the construction of viable phenomenological vacua. Thus, enlarging the space of possible solutions that may address some of the outstanding problems in string phenomenology. A tachyon free six generation Standard-like Model is presented, which can be regarded as an orbifold of the SO(16) × E 8 heterotic-string in ten dimensions. I propose that any (2, 0) heterotic-string in four dimensions can be connected to a (2, 2) one via an orbifold or by interpolations and provide some evidence for this conjecture. It suggests that any Effective Field Theory (EFT) model that cannot be connected to a (2, 2) theory is necessarily in the swampland, and will simplify the analysis of the moduli spaces of (2

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“…Most of the analyses are within Kac-Moody level 1. Here one can achieve unified groups such as [99] SU (5), SO(10) or E(6). However, one does not have scalars in the adjoint representation to break the gauge symmetry.…”

Section: Unification In Stringsmentioning

confidence: 99%

A stronger case for superunification post Higgs boson discovery

Nath

Syed

2017

Phys. Scr.

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Supersymmetry and more specifically supergravity grand unification allow one to extrapolate physics from the electroweak scale up to the grand unification scale consistent with electroweak data. Here we give a brief overview of their current status and show that the case for supersymmetry is stronger as a result of the Higgs boson discovery with a mass measurement at ∼ 125 GeV consistent with the supergravity grand unification prediction that the Higgs boson mass lie below 130 GeV. Thus the discovery of the Higgs boson and the measurement of its mass provide a further impetus for the search for sparticles to continue at the current and future colliders. *

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A Building Block for Nuclear Medicine Imaging Systems Data Acquisition

Cited by 12 publications

References 22 publications

Evaluation of digital methods for energy calculation and timing pick-off in positron emission tomography

Evaluation of digital methods for energy calculation and timing pick-off in positron emission tomography

String phenomenology from a worldsheet perspective

A stronger case for superunification post Higgs boson discovery

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