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18 results on '"Arfelli"'

2. Study of gain, noise, and collection efficiency of GaAs SAM-APDs single pixel

Author

Colja, M., primary, Cautero, M., additional, Menk, R.H., additional, Palestri, P., additional, Gianoncelli, A., additional, Antonelli, M., additional, Biasiol, G., additional, Zilio, S.D., additional, Steinhartova, T., additional, Nichetti, C., additional, Arfelli, F., additional, De Angelis, D., additional, Driussi, F., additional, Bonanni, V., additional, Pilotto, A., additional, Gariani, G., additional, Carrato, S., additional, and Cautero, G., additional

Published
2022
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5. A novel approach to separate absorption, refraction and scattering in analyzer based lung imaging

Author

C. Petris, Sandro Donato, Fulvia Arfelli, Ralph H Menk, L. Rigon, Luca Brombal, Menk, R. H., Rigon, L., Brombal, L., Donato, S., Petris, C., and Arfelli, F.

Subjects
X-ray detector, X-ray monochromator, Spectrum analyzer, Materials science, Photon, business.industry, Scattering, X-ray detectors, Medical-image reconstruction methods and algorithms, computer-aided software, X-ray monochromators, Xray radiography and digital radiography (DR), Refraction, Electromagnetic radiation, Optics, Medical-image reconstruction methods and algorithm, Lung imaging, Absorption (electromagnetic radiation), business, Instrumentation, Mathematical Physics
Abstract

In analyzer based imaging (ABI) scattering can be efficiently separated from refraction and absorption effects by acquiring three images of the sample. In the scattering image the lungs appear as areas of high intensity signal (area contrast), which is modulated by the local thickness of the scattering tissue intersecting the X-ray path. The scattering signal is also included in the so-called apparent absorption image, where it adds to the absorption contrast thanks to the extinction of rays which are deviated outside the analyzer crystal's acceptance window. The presence of scattering can be emphasized in the ratio between two images acquired with a strongly detuned and a perfectly tuned analyzer crystal, respectively: we name this ratio as the amplified scatter image. In this paper we present ABI scattering methods applied to postmortem mouse lung imaging to assess their diagnostic value. For this purpose images have been acquired at the SYRMEP beamline of the ELETTRA synchrotron in Trieste (Italy) with the Argus time delay integration CCD detector at a photon energy of 25 keV . Subsequently the parametric images, including the amplified scatter image have been obtained, and contrast and signal-to-noise ratio have been evaluated. It is noteworthy that images have been acquired with a radiation dose of some mGy, thus are compatible with dose restricted medical imaging settings such as mammography.

Published
2020
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7. Effects of p doping on GaAs/AlGaAs SAM-APDs for X-rays detection

Author

Nichetti, C., primary, Steinhartova, T., additional, Antonelli, M., additional, Biasiol, G., additional, Cautero, G., additional, Angelis, D. De, additional, Pilotto, A., additional, Driussi, F., additional, Palestri, P., additional, Selmi, L., additional, Arfelli, F., additional, Danailov, M., additional, and Menk, R.H., additional

Published
2020
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9. Influence of δ p-doping on the behaviour of GaAs/AlGaAs SAM-APDs for synchrotron radiation

Author

Steinhartova, T., primary, Nichetti, C., additional, Antonelli, M., additional, Cautero, G., additional, Menk, R.H., additional, Pilotto, A., additional, Driussi, F., additional, Palestri, P., additional, Selmi, L., additional, Koshmak, K., additional, Nannarone, S., additional, Arfelli, F., additional, Zilio, S. Dal, additional, and Biasiol, G., additional

Published
2017
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11. Imaging study of a phase-sensitive breast-CT system in continuous acquisition mode

Author

Delogu, P., primary, Golosio, B., additional, Fedon, C., additional, Arfelli, F., additional, Bellazzini, R., additional, Brez, A., additional, Brun, F., additional, Lillo, F. Di, additional, Dreossi, D., additional, Mettivier, G., additional, Minuti, M., additional, Oliva, P., additional, Pichera, M., additional, Rigon, L., additional, Russo, P., additional, Sarno, A., additional, Spandre, G., additional, Tromba, G., additional, and Longo, R., additional

Published
2017
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12. Development of a fast read-out system of a single photon counting detector for mammography with synchrotron radiation

Author

Diego Dreossi, Edoardo Castelli, Anna Bergamaschi, Fulvia Arfelli, Bernd Schmitt, L. Rigon, Renata Longo, E. Vallazza, F. Lopez, R. C. Chen, Lopez, FRANCES CAROLINE, Rigon, Luigi, Longo, Renata, Arfelli, Fulvia, Bergamaschi, A., Chen, R. C., Dreossi, Diego, Schmitt, B., Vallazza, E., and Castelli, Edoardo

Subjects
X-ray detector, medicine.medical_specialty, Controller (computing), X-ray mammography and scinto- and MRI-mammography, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Synchrotron radiation, Optics, Data acquisition concept, medicine, Mammography, Medical physics, Instrumentation, Mathematical Physics, Physics, medicine.diagnostic_test, business.industry, Dynamic range, Detector, Data acquisition concepts, Instrumentation for synchrotron radiation accelerators, X-ray detectors, Frame rate, Beamline, business
Abstract

A single-photon counting detector read-out system for mammography with synchrotron radiation has been developed with the aim to meet the needs of the mammographic imaging station of the SYRMEP beamline at ELETTRA. The system called PICASSO (Phase Imaging for Clinical Application with Silicon detector and Synchrotron radiatiOn) is a modular detector that implements a read-out system with MYTHEN II ASICs, an embedded Linux-based controller board and a Scientific Linux acquisition workstation. The system architecture and characteristics are herein presented. The system was tested at the SYRMEP beamline and achieved a frame rate of 33 Hz for 8448 channels at 24-bit dynamic range, and it is capable of continuously acquiring up to 2000 frames. Standard mammographic phantoms were imaged and good quality images were obtained at doses comparable with what is delivered in conventional full field mammographic systems.

Published
2011
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13. Edge-illumination X-ray phase contrast imaging: matching the imaging method to the detector technology

Author

Endrizzi, M., primary, Diemoz, P.C., additional, Hagen, C.K., additional, Vittoria, F.A., additional, Munro, P.R.T., additional, Rigon, L., additional, Dreossi, D., additional, Arfelli, F., additional, Lopez, F.C.M., additional, Longo, R., additional, Marenzana, M., additional, Delogu, P., additional, Vincenzi, A., additional, Ruvo, L. De, additional, Spandre, G., additional, Brez, A., additional, Bellazzini, R., additional, and Olivo, A., additional

Published
2014
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