Relevant bibliographies by topics / Collimatori multi-slit

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  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Collimatori multi-slit'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Collimatori multi-slit"

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CALCINES, A., R. L. LÓPEZ, and M. COLLADOS. "MuSICa: THE MULTI-SLIT IMAGE SLICER FOR THE EST SPECTROGRAPH." Journal of Astronomical Instrumentation 02, no. 01 (September 2013): 1350009. http://dx.doi.org/10.1142/s2251171713500098.

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Integral field spectroscopy (IFS) is a technique that allows one to obtain the spectra of all the points of a bidimensional field of view simultaneously. It is being applied to the new generation of the largest night-time telescopes but it is also an innovative technique for solar physics. This paper presents the design of a new image slicer, MuSICa (Multi-Slit Image slicer based on collimator-Camera), for the integral field spectrograph of the 4-m aperture European Solar Telescope (EST). MuSICa is a multi-slit image slicer that decomposes an 80 arcsec2 field of view into slices of 50 μm and reorganizes it into eight slits of 0.05 arcsec width × 200 arcsec length. It is a telecentric system with an optical quality at diffraction limit compatible with the two modes of operation of the spectrograph: spectroscopic and spectro-polarimetric. This paper shows the requirements, technical characteristics and layout of MuSICa, as well as other studied design options.
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Metzler, Scott D., Roberto Accorsi, Ahmet S. Ayan, and Ronald J. Jaszczak. "Slit-Slat and Multi-Slit-Slat Collimator Design and Experimentally Acquired Phantom Images From a Rotating Prototype." IEEE Transactions on Nuclear Science 57, no. 1 (February 2010): 125–34. http://dx.doi.org/10.1109/tns.2009.2033989.

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Chang, Jina, Siyong Kim, Doh-Yun Jang, and Tae-Suk Suh. "A static multi-slit collimator system for scatter reduction in cone-beam CT." Journal of Applied Clinical Medical Physics 11, no. 4 (September 2010): 196–205. http://dx.doi.org/10.1120/jacmp.v11i4.3269.

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van Roosmalen, Jarno, Freek J. Beekman, and Marlies C. Goorden. "Comparison of fan beam, slit-slat and multi-pinhole collimators for molecular breast tomosynthesis." Physics in Medicine & Biology 63, no. 10 (May 16, 2018): 105009. http://dx.doi.org/10.1088/1361-6560/aabfa3.

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Kagi, Hiroyuki. "High-pressure neutron beamline at J-PARC and applications to earth sciences." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C393. http://dx.doi.org/10.1107/s2053273314096065.

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Construction of the high-pressure dedicated beamline, PLANET, in Japan Proton Accelerator Research Complex (J-PARC) has been completed in 2012 and scientific programs for general users have just started in 2014. The PLANET beamline has a focusing mirror for incident neutron and two 900detector banks. Each bank has 160 pieces of Position Sensitive Detectors (PSDs) filled with 3He gas. Each bank has a detector coverage of 9001110against the incident beam in the horizontal direction and 001350in the vertical direction. Radial collimators are attached in front of the detector banks to reduce the background. The instrumental resolution is 0.6% in Δd/d. The accessible d-spacing is normally 0.2–4.2 Å and is doubled in a double-frame setup. The power of the proton beam is around 300 kW and will be increased to 600 kW in 2014. The most characteristic feature of the PLANET beamline is the multi-anvil apparatus with six independently acting 500-tonne rams (6-axis press called "ATSUHIME"). Using ATSUHIME, we successfully observed neutron diffraction patterns of hydrous minerals at high pressure and high temperature without any contamination from sample-surrounding materials such as pressure transmitting media, anvils, and so on. This clearly shows that the incident slit and radial collimator installed in the beamline are very effective to obtain the diffractions under high pressure. We focus on pressure-responses on the structure of materials with hydrogen- bonding networks through neutron diffraction measurements at high pressure. These results will contribute to fundamental understanding of hydrous materials in the deep earth and icy material in the planets. In the presentation, our recent achievements from PLANET beamline will be reported.
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Svensson, Björn, Björn Cederström, Magnus Åslund, Mats Lundqvist, and Max Teleman. "Variable height multi-slit collimator and optimized image reconstruction in a photon-counting system for digital mammography." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 648 (August 2011): S216—S219. http://dx.doi.org/10.1016/j.nima.2010.11.148.

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Mahmood, Shelan T., Kjell Erlandsson, Ian Cullum, and Brian F. Hutton. "The potential for mixed multiplexed and non-multiplexed data to improve the reconstruction quality of a multi-slit–slat collimator SPECT system." Physics in Medicine and Biology 55, no. 8 (March 30, 2010): 2247–68. http://dx.doi.org/10.1088/0031-9155/55/8/009.

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Ready, J., V. Negut, L. Mihailescu, and K. Vetter. "MO-FG-CAMPUS-JeP1-01: Prompt Gamma Imaging with a Multi-Knife-Edge Slit Collimator: Evaluation for Use in Proton Beam Range Verification." Medical Physics 43, no. 6Part31 (June 2016): 3717. http://dx.doi.org/10.1118/1.4957338.

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Kalef-Ezra, J. "A rebirth of radiation therapy with kV X-rays?" HNPS Proceedings 23 (March 8, 2019): 85. http://dx.doi.org/10.12681/hnps.1911.

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Novel clinical approaches using kV X-ray beams are currently under study, such as selective dose enhancement in malignant tissues due to the enhanced presence of atoms with high atomic number, Z, in tumors relative to normal tissues or the use of heavily spatially fractionated kV X-ray irradiation.Local dose enhancement by high Z atoms: A substantial dose gradient between normal and malignant tissues can be achieved by biologic targeting the cells to be “destroyed” with high Z atoms and its irradiation with photons in the energy region of tens of keV, such as synchrotron produced X-rays of energy above the K-edge. The selective accumulation of high Z atoms can be achieved by various techniques, such as by intravenous administration of a) contrast enhancement agents, b) some chemotherapeutic drugs c) nanoparticles and d) DNA precursors loaded with Z-atoms. Taking into account the limited availability and the high cost of GeV synchrotrons, brachytherapy sources could be used.Microbeam radiation therapy: Studies carried out in experimental models using spatially micro- fractionated beams have shown drastically elevated tissue radiation tolerance, with higher tissue sparing in healthy tissues than in malignant ones. This phenomenon is attributed by some investigators to the proliferation and migration of cells from the “low” dosed regions (~10 Gy) to the adjacent “heavily” dosed regions (many hundreds of grays). Multi-slit collimators allow for the production of X-ray microbeam arrays at 3rd generation synchrotron units. Monte Carlo simulations were tested versus direct dose measurements. Promising preclinical studies carried out so far, trigger studies on the development of alternative less expensive technologies.
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Fournier, Pauline, Iwan Cornelius, Mattia Donzelli, Herwig Requardt, Christian Nemoz, Marco Petasecca, Elke Bräuer-Krisch, Anatoly Rosenfeld, and Michael Lerch. "X-Tream quality assurance in synchrotron X-ray microbeam radiation therapy." Journal of Synchrotron Radiation 23, no. 5 (July 26, 2016): 1180–90. http://dx.doi.org/10.1107/s1600577516009322.

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Microbeam radiation therapy (MRT) is a novel irradiation technique for brain tumours treatment currently under development at the European Synchrotron Radiation Facility in Grenoble, France. The technique is based on the spatial fractionation of a highly brilliant synchrotron X-ray beam into an array of microbeams using a multi-slit collimator (MSC). After promising pre-clinical results, veterinary trials have recently commenced requiring the need for dedicated quality assurance (QA) procedures. The quality of MRT treatment demands reproducible and precise spatial fractionation of the incoming synchrotron beam. The intensity profile of the microbeams must also be quickly and quantitatively characterized prior to each treatment for comparison with that used for input to the dose-planning calculations. The Centre for Medical Radiation Physics (University of Wollongong, Australia) has developed an X-ray treatment monitoring system (X-Tream) which incorporates a high-spatial-resolution silicon strip detector (SSD) specifically designed for MRT. In-air measurements of the horizontal profile of the intrinsic microbeam X-ray field in order to determine the relative intensity of each microbeam are presented, and the alignment of the MSC is also assessed. The results show that the SSD is able to resolve individual microbeams which therefore provides invaluable QA of the horizontal field size and microbeam number and shape. They also demonstrate that the SSD used in the X-Tream system is very sensitive to any small misalignment of the MSC. In order to allow as rapid QA as possible, a fast alignment procedure of the SSD based on X-ray imaging with a low-intensity low-energy beam has been developed and is presented in this publication.
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Dissertations / Theses on the topic "Collimatori multi-slit"

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Morroni, Paolo. "Progettazione e sviluppo di un collimatore multi-slit per un sistema tomografico cone-beam con raggi X di alta energia." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/8351/.

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L'obiettivo di questo lavoro di tesi consiste nel progettare, realizzare e testare due collimatori multi-slit da applicare ad un sistema tomografico a raggi X con geometria cone-beam, caratterizzato da un voltaggio massimo di 320 kV. I collimatori che verranno realizzati sono un pre-collimatore e un post-collimatore entrambi multi-slit. Il fine ultimo è quello di riuscire ad avere un sistema di collimazione che permetta attraverso due sole tomografie di ottenere la ricostruzione dell'intero campione. L'abbattimento del tempo necessario per eseguire l'analisi costituisce il target su cui si basa questa tesi. Successivamente sulle immagini prodotte mediante questo nuovo sistema di collimazione saranno condotte delle specifiche analisi e i risultati saranno confrontati con quelli ottenuti mediante un sistema di collimazione a singola fenditura, anch'esso progettato in questa tesi e appositamente realizzato.
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Conference papers on the topic "Collimatori multi-slit"

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Park, Miran, Taewon Lee, and Seungryong Cho. "Bunched sparse-view CT using a moving multi-slit collimator." In 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference (2012 NSS/MIC). IEEE, 2012. http://dx.doi.org/10.1109/nssmic.2012.6551554.

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Zhang, Debin, Peng Fan, Wenzhuo Lu, Shi Wang, Yan Xia, Zhaoxia Wu, Yaqiang Liu, and Tianyu Ma. "Accurate Modeling of Multi Knife-edge Slit Collimator System Response for MeV Prompt Gamma Photons in Proton Therapy Monitoring." In 2018 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC). IEEE, 2018. http://dx.doi.org/10.1109/nssmic.2018.8824338.

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Lu, Wenzhuo, Peng Fan, Hui Liu, Zhaoxia Wu, Shi Wang, Yaqiang Liu, and Tianyu Ma. "Prompt gamma imaging with a multi-knife-edge slit collimator for large FOV monitoring of scanned proton pencil beams." In 2016 IEEE Nuclear Science Symposium, Medical Imaging Conference and Room-Temperature Semiconductor Detector Workshop (NSS/MIC/RTSD). IEEE, 2016. http://dx.doi.org/10.1109/nssmic.2016.8069396.

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