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Journal articles on the topic 'Collimated beam test'

Author: Grafiati

Published: 20 August 2021

Last updated: 29 July 2025

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1

Damayanti, Oktarina, and Indra Gunawan. "Uji Kesesuaian Berkas Cahaya Kolimasi pada Pesawat Sinar-X di Politeknik Al-Islam Bandung." Jurnal Imejing Diagnostik (JImeD) 7, no. 2 (2021): 111–13. http://dx.doi.org/10.31983/jimed.v7i2.6596.

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Background : Suitability test for light collimation are tests to ensure that x-ray aircraft meet radiation safety requirements and provide precise and accurate diagnostic or diagnostic information. Suitability test for light collimation is carried out on x-ray aircraft at Al-Islam Bandung Politeknik.Methods: The research method used in quantitative experimental method. The suitability test was carried out with a collimator test tool and beam alignment test tool placed on the tape then performed an experiment using an exposure factor of 75 Kv, 200 mA and 8 mAs with FFD 100 cm.Results: Based on

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BAIWEN, LI, S. ISHIGURO, M. M. šKORIĆ, H. TAKAMARU, and T. SATO. "Acceleration of high-quality, well-collimated return beam of relativistic electrons by intense laser pulse in a low-density plasma." Laser and Particle Beams 22, no. 3 (2004): 307–14. http://dx.doi.org/10.1017/s0263034604223151.

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The mechanism of electron acceleration by intense laser pulse interacting with an underdense plasma layer is examined by one-dimensional particle-in-cell (1D-PIC) simulations. The standard dephasing limit and the electron acceleration process are discussed briefly. A new phenomenon, of short high-quality, well-collimated return relativistic electron beam with thermal energy spread, is observed in the direction opposite to laser propagation. The process of the electron beam formation, its characteristics, and the time-history inxandpxspace for test electrons in the beam, are analyzed and expose

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NOWAK, S., and A. OREFICE. "Quasi-optical description of reflection, focusing and plasma cut-offs of electron cyclotron Gaussian beams." Journal of Plasma Physics 57, no. 2 (1997): 349–61. http://dx.doi.org/10.1017/s0022377896004850.

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In the analysis of the propagation of electromagnetic waves in the electron cyclotron frequency range, in both isotropic media and magnetoactive plasmas, the role of diffractive effects, which are not accounted for by geometrical optics, may no longer be neglected when highly collimated beams are to be employed. Moreover, when lenses, mirrors, refractive gradients and/or wave cut-offs are placed along the beam trajectory, the very concept of independent optical rays tends to introduce singularities, which do not always correspond to physical features. A quasi-optical approach has previously be

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4

Dozier, Charles M., and Noureddine Anibou. "An innovative EDXRD verification probe." Powder Diffraction 24, no. 2 (2009): 102–6. http://dx.doi.org/10.1154/1.3131802.

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Verification of materials is an increasingly important need in pharmaceutical distribution. XStream Systems, Inc. has developed an energy dispersive X-ray diffraction (EDXRD) system which can quickly verify crystalline pharmaceuticals in the distribution cycle. Materials may be in solid or powder form and the technique is nondestructive. Unlike angular X-ray diffraction (AXRD), a “white” X-ray beam between 20 and 80 keV is used. This energetic beam can penetrate through relatively thick materials, diffracting from crystallites within the samples. Materials can be observed even when they are lo

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5

Ogawa, I., Y. Kawashima, T. Hiraiwa, et al. "Development of the laser isotope separation method to study for the neutrino-less double beta decay of ⁴⁸Ca." Journal of Physics: Conference Series 2147, no. 1 (2022): 012012. http://dx.doi.org/10.1088/1742-6596/2147/1/012012.

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Abstract Search for the ultra-rare process, neutrino-less double beta decay, is a powerful tool to test the Majorana nature of neutrinos. Among the potential double beta decay nuclei, 48Ca has the largest Q-value, hence we can expect the measurement with least background. On the other hand, due to its low natural abundance, isotope enrichment is essential to achieve the sensitivity in the region of interest (inverted/normal mass hierarchy of neutrinos). We have been developing a laser isotope separation method using a tunable semiconductor laser that can excite only a specific isotope (48Ca).

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Gavlina, A. E., D. A. Novikov, and M. V. Askerko. "Orthogonal ray scheme: a method for processing interference patterns and reconstructing the shape of a test convex mirror." Journal of Physics: Conference Series 2127, no. 1 (2021): 012066. http://dx.doi.org/10.1088/1742-6596/2127/1/012066.

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Abstract This report is devoted to the processing of the interference pattern of the tested mirror, obtained using the orthogonal ray scheme, where the convex testing surface is illuminated by a collimated beam, which is perpendicular to the optical axis of the surface. The interference pattern is created by two wavefronts, one of which is reflected from the mirror, while the other wavefront bypasses the mirror and travels directly to the detector plane. The result of interference pattern processing is a topography map formed by several tangential profiles. The proposed method is suited for la

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Korytár, D., P. Vagovič, K. Végsö, et al. "Potential use of V-channel Ge(220) monochromators in X-ray metrology and imaging." Journal of Applied Crystallography 46, no. 4 (2013): 945–52. http://dx.doi.org/10.1107/s0021889813006122.

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While channel-cut crystals, in which the diffracting surfaces in an asymmetric cut are kept parallel, can provide beam collimation and spectral beam shaping, they can in addition provide beam compression or expansion if the cut is V-shaped. The compression/expansion ratio depends in this case on the total asymmetry factor. If the Ge(220) diffraction planes and a total asymmetry factor in excess of 10 are used, the rocking curves of two diffractors will have a sufficient overlap only if the second diffractor is tuned slightly with respect to the first one. This study compares and analyses sever

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Mutalik, Sunil, and Aditya Tadinada. "Assessment of relationship between extracranial and intracranial carotid calcifications—a retrospective cone beam computed tomography study." Dentomaxillofacial Radiology 48, no. 8 (2019): 20190013. http://dx.doi.org/10.1259/dmfr.20190013.

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Objectives: Cone beam CT scans in current day dental practice are highly collimated yet involve areas along the course of the extracranial carotid artery. Detecting an extracranial carotid calcification on small volume scans leaves the dentist with two questions: whether the patient is likely to have intracranial carotid calcifications and whether the patient warrants further medical attention. This study aimed to assess the presence of intracranial carotid artery calcifications (ICAC) in the presence of extracranial carotid artery calcifications (ECAC). Methods: 450 CBCT scans were retrospect

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Cantone, C., S. Ceravolo, F. Colao, et al. "R&D status for an innovative crystal calorimeter for the future Muon Collider." EPJ Web of Conferences 288 (2023): 02002. http://dx.doi.org/10.1051/epjconf/202328802002.

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The measurement of physics processes at new energy frontier experiments requires excellent spatial, time, and energy resolutions to resolve the structure of collimated high-energy jets. Calorimeters, as other detectors, must face this increasing performance demand. In a future TeV-scale Muon Collider, the beam-induced background (BIB) represents the main challenge in the design of the detectors and of the event reconstruction algorithms and can pose serious limitations to the physics performance. However, it is possible to reduce the BIB impact on the Muon Collider calorimeter by exploiting so

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Elhoushy, Ahmed A., Mohamed H. Hassan, Abdelfattah Y. Soliman, and Mohsen A. Abou Mandour. "Use of Gamma Ray Back Scattering Method for Corrosion Assessment in Insulated Pipes." Key Engineering Materials 786 (October 2018): 165–73. http://dx.doi.org/10.4028/www.scientific.net/kem.786.165.

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Corrosion of insulated pipes is a major problem in nuclear,petrochemical and other industries.This type of corrosion is difficult to measure by the available techniques of ultrasound and transmission gamma or x-ray radiography due to the presence of insulating material and limited accessibility to both sides. Gamma-ray backscattering technique is a non-contactmethod and is highly suitable for buried insulated pipes where access is limited to one side only.In the present work, MCNP5 code was used to simulate a case where pipe corrosion (i.e., wall thinning) was measured by gamma backscattered t

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11

Zhao, Huining, Wenjing Ding, Mengyao Fan, Haojie Xia, and Liandong Yu. "An optical method based auto-collimation for measuring five degrees of freedom error motions of rotary axis." Review of Scientific Instruments 93, no. 12 (2022): 125110. http://dx.doi.org/10.1063/5.0127199.

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The paper presents an optical method based on auto-collimation to simultaneously measure five degrees of freedom error motions of the rotary axis. The proposed method consists of the collimated lasers, beam splitters, focusing lens, quadrant photodiode detectors, a high-precision steel ball, and a special mirror fixed to the rotary axis. The mathematical model is established byoptical ray tracing, and the corresponding optical path is also simulated by OpticStudio. Meanwhile, an adjusting mechanism for X–Y micro-displacement, based on the elastic deformation of the material, is designed to adj

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Giovannini, Daniela, Cinzia De Angelis, Maria Denise Astorino, et al. "In Vivo Radiobiological Investigations with the TOP-IMPLART Proton Beam on a Medulloblastoma Mouse Model." International Journal of Molecular Sciences 24, no. 9 (2023): 8281. http://dx.doi.org/10.3390/ijms24098281.

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Protons are now increasingly used to treat pediatric medulloblastoma (MB) patients. We designed and characterized a setup to deliver proton beams for in vivo radiobiology experiments at a TOP-IMPLART facility, a prototype of a proton-therapy linear accelerator developed at the ENEA Frascati Research Center, with the goal of assessing the feasibility of TOP-IMPLART for small animal proton therapy research. Mice bearing Sonic-Hedgehog (Shh)-dependent MB in the flank were irradiated with protons to test whether irradiation could be restricted to a specific depth in the tumor tissue and to compare

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Grapperhaus, Michael, Raymond Schaefer, and Karl Linden. "Modeling of a new UV test cell for evaluation of lamp fluence rate effects in regard to water treatment, and comparison to collimated beam tests." Journal of Environmental Engineering and Science 6, no. 3 (2007): 271–76. http://dx.doi.org/10.1139/s06-064.

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14

Zhang, Yu, Da Xu, Bin Zhao, et al. "Multi-Partition Mapping Simulation Method for Stellar Spectral Information." Photonics 12, no. 6 (2025): 585. https://doi.org/10.3390/photonics12060585.

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Stellar radiation simulation is critical in the space industry; however, with the current simulation methods, only a single color temperature and magnitude can be modulated at a time. Furthermore, star sensors rely on star observation tests for accurate calibration; this seriously restricts their development. This paper presents a novel star spectral information multi-partition mapping simulation method to closely simulate real sky star map information, thus replacing non-scenario-specific field stargazing experiments. First, using the stellar spectral simulation principle, a multi-partition m

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15

Takei, Dai, Yoshiki Kohmura, Yasunori Senba, Haruhiko Ohashi, Kenji Tamasaku, and Tetsuya Ishikawa. "X-ray collimation by the parabolic cylinder mirror in SPring-8/BL29XUL." Journal of Synchrotron Radiation 23, no. 1 (2016): 158–62. http://dx.doi.org/10.1107/s1600577515019797.

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A combination of plane and threefold-shape X-ray mirrors was installed in SPring-8 BL29XUL. The second mirror has parabolic cylinder surfaces that collimate X-rays in the vertical direction. A performance test was conducted, yielding highly collimated 8 keV photon beams with an effective angular divergence of 0.4 µrad, below only 5% of that of the original beams. The double-mirror system preserved 70% of the total incident flux and nearly tripled the flux density at 988 m from the light source. The values of the observations were almost similar to those of our ray-tracing simulation. Based on

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16

Sanapo, Carlo, Sara Gonzalez Ruiz, Charline Fouchier, Sebastien Courtiaud, and Delphine Laboureur. "Velocity And Concentration Measurements Of Supersonic Underexpanded Jets." Proceedings of the International Symposium on the Application of Laser and Imaging Techniques to Fluid Mechanics 21 (July 8, 2024): 1–25. http://dx.doi.org/10.55037/lxlaser.21st.183.

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The release of high-speed gas jets due to a tank leakage can pose a substantial safety hazard, as it can give rise to flammable, explosive, or toxic mixtures. Hence, understanding jet dispersion in real-world conditions is crucial for designing effective safety measures. Existing targeted or traceable studies provide velocity field data, but limitations in source-driven-pressures, nozzle geometries, or cross-flow conditions restrict their representativeness under real conditions. Indeed, an exhaustive experimental dataset for supersonic underexpanded gas jet dispersion under the influence of a

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17

Sani, Elisa, Paola Sansoni, Daniela Fontani, Franco Francini, Luca Mercatelli, and David Jafrancesco. "Solar Divergence Collimators for Collector Tests." Advances in Science and Technology 74 (October 2010): 219–24. http://dx.doi.org/10.4028/www.scientific.net/ast.74.219.

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The use of solar divergence collimators is the key for reliable optical tests that reproduce the on-field collector operating conditions. Aiming to test small (<80 mm diameter/diagonal) and large concentrators (80-240 mm diameter/diagonal range), the collimator geometry should be evaluated because of some optical errors introduced by the need of bending the optical axis. This paper discusses the optical characteristics of the beams obtained with straight and bent collimators with solar divergence. The collimated beams are examined by ray tracing simulations, studying the aberrations as a fu

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Al Mashud, Md Abdullah, M. Tariquzzaman, M. Jahangir Alam, and GA Zakaria. "Photon beam commissioning of an Elekta Synergy linear accelerator." Polish Journal of Medical Physics and Engineering 23, no. 4 (2017): 115–19. http://dx.doi.org/10.1515/pjmpe-2017-0019.

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Abstract The aim of this study is to present the results of commissioning of Elekta Synergy linear accelerator (linac). The acceptance test and commissioning were performed for three photon beams energies 4 MV, 6 MV and 15 MV and for the multileaf collimator (MLC). The percent depth doses (PDDs), in-plane and cross-plane beam profiles, head scatter factors (Sc), relative photon output factors (Scp), universal wedge transmission factor and MLC transmission factors were measured. The size of gantry, collimator, and couch isocenter were also measured.

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Prasetya, I. Made Lana. "Development of Tools of the X-Ray Collimator (Dev-X)." Journal of Applied Health Management and Technology 2, no. 4 (2020): 137–44. http://dx.doi.org/10.31983/jahmt.v2i4.6386.

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Background: Technological developments, especially in the field of radiology, is growing rapidly. The radiology quality assurance system has also developed, one of which is the Collimator Test Tools. The method of testing x-ray beams using this tool has also been developed, such as using film and using IP. However, the development of this method has a drawback, namely that the examiner is required to have special skills in image post-processing. The development of Collimator Test Tools by utilizing the nature of x-rays which causes certain substances such as calcium tungstate or zinc sulfide t

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Fransiska, Enggel, Nehru Nehru, and Muhammad Ficky Afrianto. "UJI KESESUAIAN BERKAS SINAR-X DENGAN BERKAS KOLIMATOR PADA PESAWAT SINAR-X DI INSTALASI RADIOLOGI RSUD RADEN MATTAHER JAMBI." Komunikasi Fisika Indonesia 15, no. 1 (2018): 77. http://dx.doi.org/10.31258/jkfi.15.1.77-83.

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The collimator test is one of the X-ray Quality Control (QC) program, one of the central point beam testing and the area of the collimator beam using the RMI unit. The purpose of the collimator test is to find out the suitability of the broad field of collimator with the area of X-ray beam in tolerance of ≤ 2% Focus Film Distance (FFD) and the correspondence of the X-ray center point in tolerance Ɵ = 3˚ as determined by the Minister of Health Decree No . 1250 / SK / XII / 2009. The study was conducted using variations of FFD at 100 Cm, 90 Cm, 80 Cm, on three X-ray radiation radiology radiation

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Sudarsih, Kesawa, Nanik Suraningsih, and Mega Indah Puspita. "Pengujian Kolimator Pada Pesawat Sinar-X Mobile Unit Merek Siemens Di Instalasi Radiologi RSUD K.R.M.T Wongsonegoro Semarang." Journal of Health 5, no. 2 (2018): 67–71. http://dx.doi.org/10.30590/vol5-no2-p67-71.

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The quality control program includes several tests, including collimator testing. According to Kepmenkes No.1250 Year 2009, collimator testing is done once a month or after repair. Radiology Installation RSUD K.R.M.T Wongsonegoro Semarang, when examined baby gram and thoraks using aircraft X-ray mobile unit with wide field settings according to object size, the result of the resulting radiograph cut off. This X-ray plane was used in 2006. During the use, no collimator testing has been performed. This study aims to determine the results of the suitability of light beam collimator. His typ

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Saputra, Yoga, and Marido Bisra. "CONFORMITY TEST OF THE COLLIMATOR BEAM TO X-RAY ON DIAGNOSTIC X-RAY MACHINE AT THE RADIOLOGY INSTALLATION OF ARIFIN ACHMAD HOSPITAL, RIAU." Medical Imaging and Radiation Protection Research (MIROR) Journal 1, no. 1 (2021): 1–7. http://dx.doi.org/10.54973/miror.v1i1.59.

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Conformity test needs to be done in order to avoid deviation of X-rays photo. One of the test is conformity test collimator beam to X-ray. It aims to make sure angle and distance shift does not occur. This study was done at Radiology Installation of Arifin Achmad Hospital, Riau. This study is quantitative with experimental design by using collimator test tool. Tests were be done three times to each big and small focal spot. Based on Ministry of Health No. 1250 on 2009, deviation tolerance limit value is ≤ 2% FFD for conformity test of collimator beam and being ≤ 3° for the center point conform

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Yuniarti, Sri, Yohannes Sardjono, and Bilalodin Bilalodin. "Design Collimator and Dosimetry of in Vitro and in Vivo Test Using MCNP-X Code." Indonesian Journal of Physics and Nuclear Applications 1, no. 1 (2016): 14. http://dx.doi.org/10.24246/ijpna.v1i1.14-19.

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Studies were carried out to collimator modelling and dosimetry BNCT of in vitro and in vivo test using MCNP-X code. Collimator modelling performed to obtain neutron beam as required by the International Atomic Energy Agency (IAEA). Dosimetry calculations performed to obtain the results of the dose calculation (dosimetry) in the application of BNCT. Collimator modelling and dosimetry simulations performed with MCNPX program. Neutron sources used for simulation, namely cyclotrons HM-30, energy 30 MeV, the current is 1.1 mA. Collimator modelling utilizes to program MCNPX covers cells target as be

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Carra, F., C. Accettura, A. Bertarelli, et al. "Beam-Impact Validation of HL-LHC Collimator Materials: The “MultiMat-2” Experiment." Journal of Physics: Conference Series 2687, no. 8 (2024): 082036. http://dx.doi.org/10.1088/1742-6596/2687/8/082036.

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Abstract In 2017, a proton-impact test on HL-LHC collimator materials was carried out in the HiRadMat facility at CERN. The experiment, called “MultiMat”, enabled the testing of uncoated and coated material composites and alloys, in most of the cases developed at CERN, for different beam collimation functionalities. Manufacturing of these materials was then passed to industry, leading to a series production for use in the collimators installed in the LHC during Long Shutdown 2 (LS2). The industrial versions of bulk and coating materials were tested in HiRadMat in 2021 in the “MultiMat-2” exper

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van Roosmalen, A. H., M. J. H. Anthonissen, W. L. IJzerman, and J. H. M. ten Thije Boonkkamp. "Freeform design of a two-reflector system to collimate and shape a point source distribution." EPJ Web of Conferences 255 (2021): 02002. http://dx.doi.org/10.1051/epjconf/202125502002.

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We present a method to design a freeform two-reflector system to collimate and shape a beam from a point source. An important generalization compared to previous research is that the output beam can be in an arbitrary direction. The design problem is based on a generalized Monge-Ampère equation. This equation is solved using a least-squares algorithm for non-quadratic cost functions. We test our algorithm on two cases, first, uniform source and target distributions, and second, an elliptic Gaussian intensity of a laser diode to a ring-shaped illuminance. We are able to obtain good solutions in

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Payudan, Aniti, Aris Haryadi, and Farzand Abdullatif. "OPTIMIZATION OF COLLIMATOR NEUTRON DESIGN FOR BORON NEUTRON-CAPTURE CANCER THERAPY (BNCT) BASED CYCLOTRON 30 MeV." Indonesian Journal of Physics and Nuclear Applications 2, no. 3 (2017): 128. http://dx.doi.org/10.24246/ijpna.v2i3.128-136.

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<span>This research in BNCT has a goal to design a collimator that can be used for cancer therapy. Simulations were carried out by MCNPX software. A collimator is designed by cyclotron 30 MeV as a neutron generator. Independent variables varied were material and thickness of each collimator’s component to get five of IAEA’s standard of the neutron beam. The result is two collimator designs that can pass all IAEA’s standard. Those designs are cyclotron collimator I and cyclotron collimator II. Collimator designs obtained are tube collimator consisting of a cylindrical target </span>

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Sarkar, Biplab, and Anirudh Pradhan. "Choice of appropriate beam model and gantry rotational angle for low-dose gradient-based craniospinal irradiation using volumetric-modulated arc therapy." Journal of Radiotherapy in Practice 16, no. 1 (2016): 53–64. http://dx.doi.org/10.1017/s146039691600042x.

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AbstractObjectivesWe aimed to assess the impact of advanced multileaf collimator (MLC) models and flattening filter-free (3F) beam in volumetric-modulated arc therapy (VMAT)-based craniospinal irradiation (CSI).MethodsCT scans of five medulloblastoma patients who previously received CSI at our hospital were used for the present study. Patients were planned for a prescription dose of 35 Gy to craniospinal axis. A three-dimensional conformal radiotherapy (3DCRT) plan and a VMAT plan using 1 cm MLC leaf width were generated as the gold standard (reference arm). Test VMAT plans were generated usin

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Amirkhanyan, Z., N. Aftab, G. Adhikari, et al. "Comparison of measurements and simulation results of dose for the flash radiation therapy beamline at PITZ." Journal of Physics: Conference Series 2687, no. 9 (2024): 092015. http://dx.doi.org/10.1088/1742-6596/2687/9/092015.

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Abstract The high-brightness electron beam at the Photo Injector Test facility at DESY in Zeuthen (PITZ) is now also used for FLASHlab@PITZ: an R.&D platform for studying radiation biology and the FLASH effect in radiation therapy. The available parameter space of the electron beam with a momentum of 22 MeV/c allows bunch charges from 1 pC up to 5 nC, bunch durations of 0.160 ps and bunch train lengths up to 1 ms. The number of bunches in the single train can currently be varied between 1 and 1000 bunches, with an upgrade to 4500 foreseen in 2023. Radiation biology studies require accurate

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Sagehashi, Hidenori. "Development of Remote-Controlled Collimator System for Neutron Beam and 2-Dimensional Movement Stand for Beam Test of Neutron Detectors." hamon 13, no. 4 (2003): 221–22. http://dx.doi.org/10.5611/hamon.13.221.

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Begum, M., AS Mollah, MA Zaman, and AKMM Rahman. "Quality Control Tests in Some Diagnostic X-Ray Units in Bangladesh." Bangladesh Journal of Medical Physics 4, no. 1 (2013): 59–66. http://dx.doi.org/10.3329/bjmp.v4i1.14688.

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Regular implementation of quality control in diagnostic x-ray facilities is essential to provide good quality images which lead to proper diagnoses with minimum hazard and distress. Important performance tests in diagnostic radiology in Bangladesh are carried out according to a quality control protocol and the measured parameter values are compared to the relevant acceptance limits. In this work, beam alignment, field congruence, nominal focal spot, film-screen contact and half value layer for diagnostic x-ray facilities are measured by using beam alignment test tool, RMI/Victoreen collimator

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Karadöller, E., S. Uzun Duran, U. Kılıç, et al. "METU-DBL: a cost effective proton irradiation facility." Journal of Instrumentation 18, no. 06 (2023): T06010. http://dx.doi.org/10.1088/1748-0221/18/06/t06010.

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Abstract The Middle East Technical University Defocusing Beamline (METU-DBL) is designed to deliver protons with selectable kinetic energies between 15–30 MeV, and proton flux between 106–1010 protons/cm2/s, on a maximum 21.55 to 15.40 cm target region with a beam uniformity within ±6%, in accordance with the ESA ESCC No. 25100 specification for single event effects (SEEs) tests in the low energy range. The achieved high proton fluences, allow users to test space-grade materials; electronic circuits, ASICs, FPGAs, optical lenses, structural elements, and coating layers for LEO, GEO, and interp

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Kozicki, Marek, and Piotr Maras. "An Optical Reusable 2D Radiochromic Gel-Based System for Ionising Radiation Measurements in Radiotherapy." Molecules 29, no. 11 (2024): 2558. http://dx.doi.org/10.3390/molecules29112558.

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This work describes the development of a reusable 2D detector based on radiochromic reaction for radiotherapy dosimetric measurements. It consists of a radiochromic gel dosimeter in a cuboidal plastic container, scanning with a flatbed scanner, and data processing using a dedicated software package. This tool is assessed using the example of the application of the coincidence test of radiation and mechanical isocenters for a medical accelerator. The following were examined: scanning repeatability and image homogeneity, the impact of image processing on data processing in coincidence tests, and

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Fajar, Fathul, Muhammad Ridha Makruf, Andjar Pudji, and Achmad Rizal. "Experimental Measurement and Analysis: Collimation and Illumination for Conformity Measuring Instrument Design in X-ray Modality." Indonesian Journal of Electronics, Electromedical Engineering, and Medical Informatics 5, no. 2 (2023): 66–72. http://dx.doi.org/10.35882/ijeeemi.v5i2.273.

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Each radiology or X-ray device is required to perform a functional or performance test of an X-ray aircraft in accordance with the radiation safety standards of the International Nuclear Energy Agency (IAEA). The suitability test has several parameters and parts. In the X-ray Aircraft Suitability Test, there are X-ray beam collimation tests, X-ray generators and tubes, and AEC. However, the illumination and collimation test still uses the manual method. The purpose of this research is to develop the simplest method, which is to measure the illumination at four points simultaneously and store t

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Pérez Curbelo, Javier, Rogelio Diaz Moreno, and Roberto Caballero Pinelo. "Test cases for commissioning an add-on micro multi-leaf collimator Apex for stereotactic radiosurgery treatments." Revista Brasileira de Física Médica 14 (December 6, 2020): 533. http://dx.doi.org/10.29384/rbfm.2020.v14.19849001533.

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Two comprehensive test cases are presented for dosimetric commissioning of a radiosurgery system, in a hospital where dedicated phantoms are not available. The system consisted of an Elekta Precise linear accelerator, an Apex micro multi-leaf collimator, and a Monaco treatment planning system (TPS). The purpose of Test I was to assess the dose accuracy with coplanar arc beams. Test II was an end-to-end type test, a rigid Leksell stereotactic frame was fixed to a watermelon phantom and Ergo++ TPS was used for stereotactic coordinates definition. The purpose of Test II was to assess the dose acc

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Ansorge, Martin, Jan Novák, Mitja Majerle, and Ján Kozic. "The characterization of the collimated beams of fast neutrons with the clid detection system." Acta Polytechnica CTU Proceedings 37 (December 6, 2022): 10–15. http://dx.doi.org/10.14311/app.2022.37.0010.

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A new detection device for the measurements of light ions (p, d, t, α) emitted as the products of the nuclear reactions induced by fast neutrons (5-33 MeV) was recently developed at the Nuclear Physics Institute of the Czech Academy of Sciences. The main objective of the Chamber-for-Light-Ion-Detection (CLID) is to produce new differential nuclear data of high interest for the material applications related to fusion and aerospace technologies and to potentially test and validate models of nuclear reactions. Hereby the experimental set-up for the measurements with the CLID is described in detai

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Cao, Miao, Yanyu Su, and Luyao Tian. "Research on zero position measurement technology of infrared thermal imager based on CCD imaging technology." Journal of Physics: Conference Series 3009, no. 1 (2025): 012049. https://doi.org/10.1088/1742-6596/3009/1/012049.

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Abstract The infrared thermal imager zero momentum of the detection method is currently in the stage of subjective measurement, and the detection efficiency and detection accuracy are not high. This paper starts from the theory of zero position measurement of an infrared thermal imager with a new five-hole target and infrared long wave collimator. It is simulated to the infinite distant beat and combined with CCD imaging and image processing technology, and the zero position of the infrared thermal imager and beat momentum test system is designed. The experimental results show that the zero-de

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Nurcahyo, Panji, and Asri Indah Aryani. "Pelaksanaan Quality Control Pesawat Sinar X di Pelayanan Radiodiagnostik." JRI (Jurnal Radiografer Indonesia) 6, no. 2 (2023): 61–64. http://dx.doi.org/10.55451/jri.v6i2.152.

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Background: Quality Control can be used as a monitoring of the reliability of X-Ray Unit during the validity period of the Conformity Test Certificate. During the use of X-ray Unit, there is the potential for damage to components during the validity period of the certificate of passing the Compliance Test. If the X-Ray Unit Reliability Test is only carried out during the Compliance Test, then if there is a decrease in the quality and safety of the X-ray Unit it cannot be immediately known. This has the potential to endanger patients, radiation workers and the public. In Banyumas Regency, there

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Yang, S. W., S. K. Park, and K. H. Kim. "Feasibility assessment of polycrystalline CsPbI₃ relative dosimeters in photon and electron beam radiotherapy." Journal of Instrumentation 19, no. 04 (2024): P04022. http://dx.doi.org/10.1088/1748-0221/19/04/p04022.

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Abstract Volumetric modulated arc therapy represents the latest technology in radiotherapy. It involves continuous modification of the multi-leaf collimator spatial distribution, dose rate, and gantry rotational speed, necessitating a dosimeter with high spatial resolution and exceptional sensitivity per unit volume. In particular, cesium-based inorganic perovskites have been studied for various applications, spanning from photoconductor solar cells to radiation detectors. These perovskites are renowned for their outstanding attributes, including thermal stability, inorganic stability, and lig

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Piotrowski, Michał, Piotr Maras, and Marek Kozicki. "On the Use of the Fricke-Pluronic F-127 Gel Dosimeter for Radiation Isocenter Testing of a Medical Linear Accelerator." Materials 17, no. 7 (2024): 1521. http://dx.doi.org/10.3390/ma17071521.

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This work presents a Fricke-XO-Pluronic F-127 2D radiochromic dosimeter with a flat-bed scanner for 2D reading and a dedicated data processing software package as a tool for performing coincidence testing of the radiation and mechanical isocenter of a medical accelerator. The optimal irradiation parameters were determined as follows: monitor units per beam and multi-leaf collimator gap, which are ≤750–≤2500 MU and 2–5 mm, respectively, for a cuboidal container with dimensions of 12 × 12 × 0.3 cm3. Despite the diffusion of Fe3+ ions occurring during irradiation, 2D reading can be performed at l

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Rosenthal, M., D. Banerjee, J. Bernhard, et al. "Single-muon rate reduction for beam dump operation of the K12 beam line at CERN." International Journal of Modern Physics A 34, no. 36 (2019): 1942026. http://dx.doi.org/10.1142/s0217751x19420260.

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The Physics Beyond Colliders study investigates the feasibility of future projects and experiments using CERN facilities. In the scope of this study, a future operation of the NA62 experiment using the existing K12 beam line operated in beam dump mode is discussed. Such a setup allows for a search for dark sector particles, e.g. heavy neutral leptons, dark photons and axions. Production of these hypothetical particles requires the 400GeV/c proton beam extracted from the Super Proton Synchrotron (SPS) to be dumped on a massive dump collimator located in the first part of the K12 beam line. The

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Ike-Ogbonna, M. I., W. E. Mangset, and E. E. Ike. "COMPARISON OF QUALITY CONTROL PARAMETERS OF DIAGNOSTIC X-RAY MACHINES IN GOVERNMENT, MISSION AND PRIVATE OWNED FACILITIES IN JOS, NIGERIA." Open Journal of Medical Research (ISSN: 2734-2093) 1, no. 1 (2020): 20–27. http://dx.doi.org/10.52417/ojmr.v1i1.74.

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Due to the availability and frequent use of x-ray machine in the diagnoses of diseases and treatment of diseases in most of our hospitals and radio-diagnostic centers in Nigeria, the need to assess the quality control parameters and level of compliance of the x-ray machines cannot be over emphasized. The purpose of this research is to compare the result of four Quality Control test parameters of government (G1and G2), mission (M1 and M2) and private owned (P1and P2) x-ray machines of the radio-diagnostic facilities to ascertain the level of compliance among them with the set reference toleranc

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Andriani, Intan, and Novia Putri Tsania. "PENGUJIAN KOLIMATOR DI INSTALASI RADIOLOGI RSU QIM BATANG." Jurnal Kesehatan Tambusai 5, no. 4 (2024): 13678–84. https://doi.org/10.31004/jkt.v5i4.34106.

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Menurut KEPMENKES No. 1250 Tahun 2009 tentang pedoman kendali mutu (quality control) metode untuk uji kolimator menggunakan metode Collimator Beam Alligment Test Tool, dan frekuensi pengujian kolimator menurut (KMK_No_1250_Tahun_2009_ttg_Kendali_Mutu, 2009) adalah satu bulan sekali atau setelah perbaikan. Kolimator pesawat sinar-X pada bulan juni tahun 2024 belum dilakukan uji kolimasi. Tujuan dari penelitian ini adalah untuk mengetahui hasil uji kolimator pada pesawat sinar-X. Tahapan-tahapan penelitian yang dilakukan yaitu observasi, pengambilan data, pengolahan data dan analisis data. Peuba

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Jana, M. R., M. Chung, B. Freemire, et al. "Measurement of transmission efficiency for 400 MeV proton beam through collimator at Fermilab MuCool Test Area using Chromox-6 scintillation screen." Review of Scientific Instruments 84, no. 6 (2013): 063301. http://dx.doi.org/10.1063/1.4808275.

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Dasril, Dila Nelvo. "Pengujian Tabung Kolimator Pesawat Sinar-X Merk Toshiba Type E2739 di Laboratorium Radiologi Universitas Baiturrahmah Padang." JURNAL ILMU FISIKA | UNIVERSITAS ANDALAS 11, no. 2 (2019): 56–61. http://dx.doi.org/10.25077/jif.11.2.56-61.2019.

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Telah dilakukan pengujian tabung kolimasi pesawat sinar-X konvensional. Tujuan dari penelitian ini adalah untuk mengetahui iluminensi lampu kolimator dan kesamaan berkas cahaya kolimasi pada pesawat tersebut. Penelitian dilakukan di laboratorium radiologi jurusan DIII Radiologi Universitas Baiturrahmah. Jenis penelitian yang digunakan yaitu penelitian kuantitatif experimental dengan langsung meneliti ke lapangan. Alat-alat yang digunakan dalam penelitian ini adalah Lux Meter, Collimator Alignment Test Tool dan Beam Alignment Test Tool, dengan menggunakan Focus Film Distace (FFD) 100 cm. Hasil

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Glebov, Alexei L., Michael G. Lee, and Kishio Yokouchi. "Fast Photonic Switches with Ferroelectric Films." Advances in Science and Technology 45 (October 2006): 2640–47. http://dx.doi.org/10.4028/www.scientific.net/ast.45.2640.

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Fir st prototypes of electrooptic (EO) planar deflector switches (PDS) are fabricated with hybrid integration on Si substrates. Planar optical modules, made in silica-on-silicon technology, consist of input and output waveguide microlenses facing each other and slab waveguides in between. The modules interconnect the input and output fibers with laterally collimated light beams less than 400 m in width at distances up to 100 mm with losses lower than 3 dB. Thin lead lanthanum zirconium titanate (PLZT) films with prism-shaped electrodes grown on SrTiO3 substrates form the deflector elements. Th

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Snyder, Jeffrey E., Joël St-Aubin, Sridhar Yaddanapudi, et al. "Reducing MRI-guided radiotherapy planning and delivery times via efficient leaf sequencing and segment shape optimization algorithms." Physics in Medicine & Biology 67, no. 5 (2022): 055005. http://dx.doi.org/10.1088/1361-6560/ac5299.

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Abstract Objective. Extended treatment session times are an operational limitation in magnetic resonance imaging guided adaptive radiotherapy (MRIgRT). In this study a novel leaf sequencing algorithm called optimal fluence levels (OFL) and an optimization algorithm called pseudo gradient descent (PGD) are evaluated with respect to plan quality, beam complexity, and the ability to reduce treatment session times on the Elekta Unity MRIgRT system. Approach. Ten total patients were evaluated on this Institutional Review Board approved study: three with prostate cancer, three with oligometastases,

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Yakovlev, Semyon V., Sergey A. Sadovnikov, and Oleg A. Romanovskii. "Mobile Airborne Lidar for Remote Methane Monitoring: Design, Simulation of Atmospheric Measurements and First Flight Tests." Remote Sensing 14, no. 24 (2022): 6355. http://dx.doi.org/10.3390/rs14246355.

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The results of modernization of a mobile lidar for the airborne monitoring of the methane content in the atmosphere are presented. The modernization was carried out on the basis of in situ tests, several engineering solutions, and preliminary numerical simulations. The in situ tests showed a possibility of sounding background tropospheric methane concentrations along a 500 m surface path. During the modernization, the airborne lidar for methane monitoring was supplemented with an off-axis mirror collimator, which made it possible to reduce the divergence of laser radiation by a factor of 4. Th

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Huang, Handan, Li Jiang, Yiyun Yao, Zhong Zhang, Zhanshan Wang, and Runze Qi. "Controlling Film Thickness Distribution by Magnetron Sputtering with Rotation and Revolution." Coatings 11, no. 5 (2021): 599. http://dx.doi.org/10.3390/coatings11050599.

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The laterally graded multilayer collimator is a vital part of a high-precision diffractometer. It is applied as condensing reflectors to convert divergent X-rays from laboratory X-ray sources into a parallel beam. The thickness of the multilayer film varies with the angle of incidence to guarantee every position on the mirror satisfies the Bragg reflection. In principle, the accuracy of the parameters of the sputtering conditions is essential for achieving a reliable result. In this paper, we proposed a precise method for the fabrication of the laterally graded multilayer based on a planetary

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Francis, Mr Geo, Dr. Arun K, and Mr Akash Paul Savio. "Study on Synthetic Aperture Focusing Technique (SAFT)." International Journal of Research Publication and Reviews 03, no. 12 (2022): 1616–20. http://dx.doi.org/10.55248/gengpi.2022.31296.

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The Synthetic Aperture Focussing Technique (SAFT) restores ultrasonic images obtained from either B or C scans having focusing distortion. With the help of SAFT, improvement in image resolution was obtained without the use of traditional ultrasonic lenses. The images from both the B and the C scans have a lateral resolution limited by the focus of ultrasonic transducers. The techniques commonly used to improve the lateral resolution include using additional lenses or by using synthetic focus. The use of lenses makes the beams more collimated but introduces a considerable loss in transmitted si

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Borissov, A., T. Neukirch, E. P. Kontar, J. Threlfall, and C. E. Parnell. "Particle acceleration with anomalous pitch angle scattering in 3D separator reconnection." Astronomy & Astrophysics 635 (March 2020): A63. http://dx.doi.org/10.1051/0004-6361/201936977.

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Context. Understanding how the release of stored magnetic energy contributes to the generation of non-thermal high energy particles during solar flares is an important open problem in solar physics. There is a general consensus that magnetic reconnection plays a fundamental role in the energy release and conversion processes taking place during flares. A common approach for investigating how reconnection contributes to particle acceleration is to use test particle calculations in electromagnetic fields derived from numerical magnetohydrodynamic (MHD) simulations of reconnecting magnetic fields

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