IEEE Symposium Conference Record Nuclear Science 2004., 2004
The I-Imas (Intelligent Imaging Sensors) is an EU project whose objective is to design and develo... more The I-Imas (Intelligent Imaging Sensors) is an EU project whose objective is to design and develop intelligent imaging sensors and evaluate their use within an adaptive medical imaging system specifically tailored to Mammography and Dental Radiology. The system will employ an in line scanning technology approach and proposes the use of CMOS active pixels sensors. The I-Imas sensor will have
ABSTRACT The uniformity of response of CVD diamond radiation detectors produced from high quality... more ABSTRACT The uniformity of response of CVD diamond radiation detectors produced from high quality diamond film, with crystallite dimensions of >100 mm, has been studied using ion beam induced charge imaging. A micron-resolution scanning alpha particle beam was used to produce maps of pulse height response across the device. The detectors were fabricated with a single-sided coplanar electrode geometry to maximise their sensitivity to the surface region of the diamond film where the diamond crystallites are highly ordered. High resolution ion beam induced charge images of single crystallites were acquired that demonstrate variations in intra-crystallite charge transport and the termination of charge transport at the crystallite boundaries. Cathodoluminescence imaging of the same crystallites shows an inverse correlation between the density of radiative centres and regions of good charge transport. r 2002 Elsevier Science B.V. All rights reserved.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2010
ABSTRACT 14C ions (290 keV) have been detected with chemically vapour deposited diamond. Potentia... more ABSTRACT 14C ions (290 keV) have been detected with chemically vapour deposited diamond. Potential benefits of diamond detectors are radiation hardness, high charge collection and very fast response time/high bandwidth.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2007
We have developed a 1.5D CMOS active pixel sensor to be used in conjunction with a scintillator f... more We have developed a 1.5D CMOS active pixel sensor to be used in conjunction with a scintillator for X-ray imaging. Within the Intelligent Imaging Sensors (I-ImaS) project, multiple sensors will be aligned to form a line-scanning system and its performance evaluated with respect to existing sensors in other digital radiography systems. Each sensor contains a 512×32 array of pixels and
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2001
Studies have been made of the performance of polycrystalline CVD diamond for use as a radiation d... more Studies have been made of the performance of polycrystalline CVD diamond for use as a radiation detector in high temperature or high radiation environments. In this work, we have fabricated a coplanar CVD diamond detector consisting of inter-digitated metal electrodes deposited only on the ‘growth’ side of the diamond film. This device geometry produces lateral electric field distributions close to
AbstractWe investigated the performance of synthetic high purity monocrystalline diamond radiati... more AbstractWe investigated the performance of synthetic high purity monocrystalline diamond radiation detectors fabricated with TiW, Cr/Au and a novel metallization technique utilising diamond-like carbon tunnelling junction and Pt/Au as electrical contacts. The ...
To survey end-user opinions on dental digital sensor characteristics for the design of a new X-ra... more To survey end-user opinions on dental digital sensor characteristics for the design of a new X-ray imaging sensor. 100 questionnaires were sent out to dentists and dental radiologists. The questionnaire consisted of six parts related to dental sensors. A: Details about the respondent; B: Prioritization of most important aspects of digital sensors; C: Rating advantages and D: disadvantages of digital sensors; F: Dental features that need to be enhanced by digital sensors; G: End-user comments. Fifty-six questionnaires were returned. Contrast resolution and imaging time were assessed as the most and the least important aspects, respectively. Aspects considered as advantages by approximately 80% of respondents were: optimal contrast resolution, increased specificity, increased discrimination between diseased and healthy tissue, increased sensitivity, lower dose to the patient by more than 20%; as a disadvantage, increased patient dose was given. Dental features considered important by over 80% of the respondents were for intraoral radiographs: the visibility of caries, periapical, periodontal, and bone lesions; for panoramic radiographs: reduction of ghost images, image sharpness and bone. Bone and soft tissues on cephalograms and bone on temporomandibular joint (TMJ) tomograms were mentioned by over 70%. The most desired characteristic for a new sensor is contrast resolution. Dose saving is not considered as important unless it is more than 20%. Examination time is not a major issue. Caries, periapical and periodontal, and bone lesions for intraoral radiographs, reduction of ghost images, image sharpness and bone for panoramic radiographs were the most frequently mentioned dental features that should be enhanced by digital sensors.
IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Record, Nov 2011
We report on novel radiation hard imaging detectors based on diamond electronics. The proposed de... more We report on novel radiation hard imaging detectors based on diamond electronics. The proposed detectors can be operated at room temperature and are able to detect deep UV photons, X-rays, gamma rays, charged particles and neutrons for a wide range of industrial and research applications as: particle tracking at CERN, beam conditions monitoring for synchrotrons and LINACS, radiotheraphy imaging, excimer laser beam diagnostics etc. State of the-art commercially available photon and particle beam imaging and position detectors are mainly based on silicon, despite its intrinsic limitations. Main limitation of silicon devices is in the analysis of high-power sources as high energy particle and photon beams: the maximum density of energy that can be transferred to the detector without radiation damage is quite low, and the detectors lifetime is limited. To limit radiation damage, a reduced signal to noise ratio and high leakage current, silicon detectors need to be cooled down and cannot operate at room temperature; moreover, silicon detectors are also forced to use attenuators and/or wavelength converters (i.e. fluorescent crystals), so introducing loss factors in terms of spatial resolution.
IEEE Symposium Conference Record Nuclear Science 2004., 2004
The I-Imas (Intelligent Imaging Sensors) is an EU project whose objective is to design and develo... more The I-Imas (Intelligent Imaging Sensors) is an EU project whose objective is to design and develop intelligent imaging sensors and evaluate their use within an adaptive medical imaging system specifically tailored to Mammography and Dental Radiology. The system will employ an in line scanning technology approach and proposes the use of CMOS active pixels sensors. The I-Imas sensor will have
ABSTRACT The uniformity of response of CVD diamond radiation detectors produced from high quality... more ABSTRACT The uniformity of response of CVD diamond radiation detectors produced from high quality diamond film, with crystallite dimensions of >100 mm, has been studied using ion beam induced charge imaging. A micron-resolution scanning alpha particle beam was used to produce maps of pulse height response across the device. The detectors were fabricated with a single-sided coplanar electrode geometry to maximise their sensitivity to the surface region of the diamond film where the diamond crystallites are highly ordered. High resolution ion beam induced charge images of single crystallites were acquired that demonstrate variations in intra-crystallite charge transport and the termination of charge transport at the crystallite boundaries. Cathodoluminescence imaging of the same crystallites shows an inverse correlation between the density of radiative centres and regions of good charge transport. r 2002 Elsevier Science B.V. All rights reserved.
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2010
ABSTRACT 14C ions (290 keV) have been detected with chemically vapour deposited diamond. Potentia... more ABSTRACT 14C ions (290 keV) have been detected with chemically vapour deposited diamond. Potential benefits of diamond detectors are radiation hardness, high charge collection and very fast response time/high bandwidth.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2007
We have developed a 1.5D CMOS active pixel sensor to be used in conjunction with a scintillator f... more We have developed a 1.5D CMOS active pixel sensor to be used in conjunction with a scintillator for X-ray imaging. Within the Intelligent Imaging Sensors (I-ImaS) project, multiple sensors will be aligned to form a line-scanning system and its performance evaluated with respect to existing sensors in other digital radiography systems. Each sensor contains a 512×32 array of pixels and
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2001
Studies have been made of the performance of polycrystalline CVD diamond for use as a radiation d... more Studies have been made of the performance of polycrystalline CVD diamond for use as a radiation detector in high temperature or high radiation environments. In this work, we have fabricated a coplanar CVD diamond detector consisting of inter-digitated metal electrodes deposited only on the ‘growth’ side of the diamond film. This device geometry produces lateral electric field distributions close to
AbstractWe investigated the performance of synthetic high purity monocrystalline diamond radiati... more AbstractWe investigated the performance of synthetic high purity monocrystalline diamond radiation detectors fabricated with TiW, Cr/Au and a novel metallization technique utilising diamond-like carbon tunnelling junction and Pt/Au as electrical contacts. The ...
To survey end-user opinions on dental digital sensor characteristics for the design of a new X-ra... more To survey end-user opinions on dental digital sensor characteristics for the design of a new X-ray imaging sensor. 100 questionnaires were sent out to dentists and dental radiologists. The questionnaire consisted of six parts related to dental sensors. A: Details about the respondent; B: Prioritization of most important aspects of digital sensors; C: Rating advantages and D: disadvantages of digital sensors; F: Dental features that need to be enhanced by digital sensors; G: End-user comments. Fifty-six questionnaires were returned. Contrast resolution and imaging time were assessed as the most and the least important aspects, respectively. Aspects considered as advantages by approximately 80% of respondents were: optimal contrast resolution, increased specificity, increased discrimination between diseased and healthy tissue, increased sensitivity, lower dose to the patient by more than 20%; as a disadvantage, increased patient dose was given. Dental features considered important by over 80% of the respondents were for intraoral radiographs: the visibility of caries, periapical, periodontal, and bone lesions; for panoramic radiographs: reduction of ghost images, image sharpness and bone. Bone and soft tissues on cephalograms and bone on temporomandibular joint (TMJ) tomograms were mentioned by over 70%. The most desired characteristic for a new sensor is contrast resolution. Dose saving is not considered as important unless it is more than 20%. Examination time is not a major issue. Caries, periapical and periodontal, and bone lesions for intraoral radiographs, reduction of ghost images, image sharpness and bone for panoramic radiographs were the most frequently mentioned dental features that should be enhanced by digital sensors.
IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Record, Nov 2011
We report on novel radiation hard imaging detectors based on diamond electronics. The proposed de... more We report on novel radiation hard imaging detectors based on diamond electronics. The proposed detectors can be operated at room temperature and are able to detect deep UV photons, X-rays, gamma rays, charged particles and neutrons for a wide range of industrial and research applications as: particle tracking at CERN, beam conditions monitoring for synchrotrons and LINACS, radiotheraphy imaging, excimer laser beam diagnostics etc. State of the-art commercially available photon and particle beam imaging and position detectors are mainly based on silicon, despite its intrinsic limitations. Main limitation of silicon devices is in the analysis of high-power sources as high energy particle and photon beams: the maximum density of energy that can be transferred to the detector without radiation damage is quite low, and the detectors lifetime is limited. To limit radiation damage, a reduced signal to noise ratio and high leakage current, silicon detectors need to be cooled down and cannot operate at room temperature; moreover, silicon detectors are also forced to use attenuators and/or wavelength converters (i.e. fluorescent crystals), so introducing loss factors in terms of spatial resolution.
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Papers by Arnaldo Galbiati