Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"semiconductor detector"”.
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Room temperature semiconductor detector performance enhancement for multi-energy spect imaging system development and its application in alpha emitter radiopharmaceutical therapy
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01
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Evaluation of room-temperature semiconductor detectors for ultrahigh resolution pet imaging
The evaluation of a room-temperature semiconductor detector for ultrahigh resolution positron emission tomography (PET) imaging is presented. The approach is based on the use of a CdTe semiconductor detector. The detector is a 2mm thick cadmium telluride (CdTe) detector with a pixel pitch of 350μm …
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Photoproduction of pi�� mesons from He3 with 340 MeV bremsstrahlung
… The recoil nuclei were observed with silicon semiconductor detectors. At least one gamma ray from the pion decay was detected with a lead glass Cherenkov counter. A coincidence between a semiconductor detector and the Cherenkov counter triggered an oscilloscope on which all pulses were then …
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A Novel Neutron Recoil Spectrometer Concept Utilizing Heavy-Ion Recoils and Time- and Spatially-Resolved Sensor
… are then measured on a time- and space-resolved semiconductor detector. Using this time and location information, coupled with the equations governing the mechanics of elastic collisions, one can determine the energy of the neutron that scattered the ion. This thesis considers the many …
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A PATTERN RECOGNITION APPROACH TO LEARNING TRACKS OF HEAVY-ION PARTICLES IN TIMEPIX DETECTORS
The rapid development in semiconductor detector technology at CERN has provided the capability to develop an active personal dosimeter for use in space radiation environments. The work reported here is based on the Timepix chip, which when coupled with an Si sensor, can function as an active …
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Characterization of single-sided cadmium zinc telluride strip detectors for high energy astrophysics applications
… or CZT) was introduced as a new room temperature semiconductor detector due to its good energy resolution, high atomic number, high density and good stopping power in the early 1990s. UNH has focused on developing CZT strip detector designs for astrophysical measurement applications in the 0.05 to …
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Fisher Information in X-ray/Gamma-ray Imaging Instrumentation Design
… in a photon-counting x-ray/gamma-ray imaging detector is a complex process resulting in detector signals governed by multiple random effects. Recovering maximum possible information about event attributes of interest requires a systematic collection of calibration data and analysis provided by …
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Breath hydrogen studies of lactose malabsorption in children resident in New Zealand, Cook Islands and Western Samoa
… lactose load. A portable gas chromatograph and a semiconductor detector, designed and constructed for use in the Pacific Islands is described. Following verification on known malabsorber and. normal subjects, the technique was used to determine the prevalence of LM in Europeans at Auckland and …
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Development of novel emission tomography system
… Since the image quality strongly depends on the detector properties, both scintillation and semiconductor detectors are under active investigation for high resolution X-ray and gamma ray photon detection. The desired detector properties include high intrinsic spatial resolution, high energy …
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Examining Thin Film AlSb for Room Temperature Gamma Detectors
A thin film semiconductor device was grown by MBE methods, characterized for material quality and evaluated for suitability as a room temperature gamma radiation detector. The objective was to produce a device that was superior to current semiconductor detectors, namely HPGe and CZT which have …
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Multi-pixel charge sharing energy reconstruction (MCSER) algorithm with application in small-pixel semiconductor detectors
Small-pixel CdTe/CZT semiconductor detectors have shown great potential in medical imaging. However, most of current CZT detectors used in medical imaging applications still suffer serious performance degradation partially due to incomplete charge-collection. In this paper, we discuss a multi-pixel …
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Development of the MRC-SPECT-II system: a MR-compatible small-animal SPECT system based on semiconductor imaging spectrometers and a Synthetic Compound-Eye gamma camera design
… still mainly based on cumbersome scintillation detectors, characterized by poor energy and spatial resolution, the demand of high-performance SPECT instrumentation continues to rise. We have designed and fully developed the second-generation of a Magnetic Resonance (MR)-Compatible SPECT system, …
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Inverted compound eye camera for second generation MRI compatible SPECT system
… de-magnifying geometry that requires a reduced detector volume, compared to typical pinhole SPECT system that relies on magnifying geometry to achieve a high spatial resolution. This offers the practical benefit of potentially lower construction cost. In this study, we used Monte Carlo studies …
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Towards simultaneous single emission microscopy and magnetic resonance imaging
… system is constructed with 40 small pixel CdTe detector modules assembled in a fully stationary ring SPECT geometry. Series of experiments have demonstrated that this system is capable of providing an imaging resolution of <500μm, when operated inside MR scanners. The ultrahigh resolution …