525 research outputs found
Prys-versen, behelzende: Den mensch, door Adams val, gebragt in slaeverny; gerukt door 's Heylands dood uyt satans heerschappy. Wacken 1806.
No full textBernardus Coucke fungeert als ' geheymschryver' .. - Ook bijdragen van: Char. Broeckaert; Fr. Stichelbaut; J.-J. Catulle; M.-D. Coen; J. De Pestel; J. De Vligere; J.-B. Huys; C. Minnens; J.-A. Van Lancker; Colpaert; Van den Poele; Van den Haute, Anselme; etc.. - Prijzen gewonnen door: Petronella Moens (Bergen op Zoom); Leo D' hulster (Tielt); J.B.J. Hoffman (Kortrijk); Jean Jos. Soenen (Deinze);J-B. Hoffmans, J.B.F. (Aalst); David de Simpele (Hooglede); Mahan; Lambin; Jacobs.Vanderhaeghen, F. Bib. gantoise 808
Application of the HICAM camera for imaging of prompt gamma rays in measurements of proton beam range
No full textThe HICAM gamma camera is an imaging device recently developed in the framework of a European project, based on Silicon Drift Detectors (SDDs) as photodetectors. Although originally designed for low-energy gamma-ray imaging in nuclear medicine (140 keV of 99mTc), in this work we attempt to use the camera, suitably modified, to image high energy prompt gamma rays (2 to 7 MeV) emitted by a target irradiated by protons. The final objective of our experiment is to assess the feasibility of proton beam range measurements by prompt gamma imaging with a slit camera, and the HICAM camera was chosen for a first prototype. Although a SDD-based camera would not be fast enough for real treatment conditions, the prototype here employed benefited from the camera modularity, compactness, high resolution and low noise. The camera here employed is composed of 25 SDDs of 1 cm 2 active area each, arranged in a 5x5 format, already used in clinical and research environments with a high intrinsic spatial resolution (∼1 mm). The SDD matrix has been coupled to a LYSO crystal (1cm thickness), to improve efficiency with high-energy gammas, and has been characterized preliminarily with a 60Co source. Good imaging performances have been obtained in this test. Moreover, results of a first test of the camera to detect prompt gammas emitted with a proton beam impinging on a plastic target are presented in this work. © 2011 IEEE.SCOPUS: cp.pinfo:eu-repo/semantics/publishe
Properties of b-Quark Production at the Tevatron
No full textThis report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Distributio
[catalog] Catalogue d'une collection de livres, estampes, dessins et tableaux, délaissés par Mr. Jean-Antoine Stichelbaut [...].
No full textVente: 27 Décembre 1814 et jours suivansVanderhaeghen, F. Bib. gantoise 7063Bijzondere collectiesEuropeana-GoogleBook
Prompt gamma imaging of a proton pencil beam at clinical current intensities: First test on a prototype and development of a full-size camera
No full textTreatments delivered by proton therapy are affected by uncertainties on the range of the beam within the patient. To reduce these margins and improve feedback on treatment delivery, different projects are investigating real-time range control by imaging prompt gammas emitted along the proton tracks in the patient. This study supports the development of a prompt gamma camera using a knife-edge slit collimator to produce a reversed 1-dimensional projection of the beam path on a scintillation detector for treatments delivered in pencil beam scanning mode. The ability of this camera design to detect modifications of the beam penetration depth in a PMMA target was already demonstrated down to 1 mm accuracy for doses compatible with single pencil beams at low proton beam currents thanks to the HiCam photo-detection system. In order to fulfill the very demanding count rate capability required for prompt gamma imaging at clinical beam currents, a new, dedicated, cost-effective photo-detection system was designed. This 1-dimensional, high-energy gamma imaging device relies on two rows of 20 LYSO crystal slabs, directly coupled to SiPMs' arrays and readout by 40 independent acquisition channels in fast counting mode. A first prototype limited to 20 channels was implemented to benchmark the performances of various components and validate the adequate combination of crystal material, surface treatment, optical coupling and SiPMs. This prototype was tested during proton irradiation at the West German Proton Therapy Centre in Essen at clinical beam currents of several nA at nozzle exit
Prompt gamma imaging with a slit camera for real-time range control in proton therapy: Experimental validation up to 230 MeV with HICAM and development of a new prototype
No full textTreatments delivered by proton therapy are affected by uncertainties on the range of the beam within the patient. To reduce these margins and deliver safer treatments, different projects are currently investigating real-time range control by imaging prompt gammas emitted along the proton tracks in the patient. This study reports on the development and test of a prompt gamma camera using a slit collimator to obtain a 1-dimensional projection of the beam path on a scintillator detector. A first prototype slit camera using the HICAM gamma detector, originally developed for low-energy gamma-ray imaging in nuclear medicine and modified for this purpose, was tested successfully up to 230 MeV beam energy. Results now confirm the potential of this concept for real-time range monitoring with millimeter accuracy in pencil beam scanning mode for the whole range of clinical energies. With the experience gained, a new prototype is under study for clinical beam currents. In this work, we present both the profiles obtained at 230 MeV using HICAM and the description of the new gamma camera prototype design
- …
