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Journal articles on the topic '3-Gamma imaging'

Author: Grafiati

Published: 14 September 2024

Last updated: 27 July 2025

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1

Haefner, Andrew, Ross Barnowski, Paul Luke, Mark Amman, and Kai Vetter. "Handheld real-time volumetric 3-D gamma-ray imaging." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 857 (June 2017): 42–49. http://dx.doi.org/10.1016/j.nima.2016.11.046.

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Hu, Yifan, Zhenlei Lyu, Peng Fan та ін. "A Wide Energy Range and 4π-View Gamma Camera with Interspaced Position-Sensitive Scintillator Array and Embedded Heavy Metal Bars". Sensors 23, № 2 (2023): 953. http://dx.doi.org/10.3390/s23020953.

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(1) Background: Gamma cameras have wide applications in industry, including nuclear power plant monitoring, emergency response, and homeland security. The desirable properties of a gamma camera include small weight, good resolution, large field of view (FOV), and wide imageable source energy range. Compton cameras can have a 4π FOV but have limited sensitivity at low energy. Coded-aperture gamma cameras are operatable at a wide photon energy range but typically have a limited FOV and increased weight due to the thick heavy metal collimators and shielding. In our lab, we previously proposed a 4

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Vetter, Kai, Ross Barnowksi, Andrew Haefner, Tenzing H. Y. Joshi, Ryan Pavlovsky, and Brian J. Quiter. "Gamma-Ray imaging for nuclear security and safety: Towards 3-D gamma-ray vision." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 878 (January 2018): 159–68. http://dx.doi.org/10.1016/j.nima.2017.08.040.

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Chmeissani, Mokhtar, Machiel Kolstein, Gerard Ariño-Estrada, José Gabriel Macias-Montero, Carles Puigdengoles, and Jorge García. "Tracking a moving point source using triple gamma imaging." Journal of Instrumentation 19, no. 01 (2024): P01001. http://dx.doi.org/10.1088/1748-0221/19/01/p01001.

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Abstract With positron emission tomography (PET), the positron of a β + emitter radioisotope annihilates with a nearby electron producing a pair of back-to-back 511 keV gamma rays that can be detected in a scanner surrounding the point source. The position of the point source is somewhere along the Line of Response (LOR) that passes through the positions where the 511 keV gammas are detected. In standard PET, an image reconstruction algorithm is used to combine these LORs into a final image. This paper presents a new tomographic imaging technique to locate the position of a β + emitting point

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Zhang, Jipeng, Xiong Xiao, Ye Chen, et al. "A Portable Three-Layer Compton Camera for Wide-Energy-Range Gamma-ray Imaging: Design, Simulation and Preliminary Testing." Sensors 23, no. 21 (2023): 8951. http://dx.doi.org/10.3390/s23218951.

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(1) Background: The imaging energy range of a typical Compton camera is limited due to the fact that scattered gamma photons are seldom fully absorbed when the incident energies are above 3 MeV. Further improving the upper energy limit of gamma-ray imaging has important application significance in the active interrogation of special nuclear materials and chemical warfare agents, as well as range verification of proton therapy. (2) Methods: To realize gamma-ray imaging in a wide energy range of 0.3~7 MeV, a principle prototype, named a portable three-layer Compton camera, is developed using the

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Li, Hui, and Wenbiao Chen. "Unintended findings: Therapeutic effects of hormones or gamma globulins on Lentiform Fork sign in 3 diabetic uremic patients: Case report/case series." Medicine 102, no. 34 (2023): e34819. http://dx.doi.org/10.1097/md.0000000000034819.

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Introduction: The lentiform fork sign (LFS) is a unique magnetic resonance imaging (MRI) finding characterized by a bright hyperintense rim delineating the lentiform nucleus as a fork associated with metabolic acidosis in end-stage renal disease. Patient concerns: We report 3 cases of LFS in diabetic uremic patients. In one case of uremia, intensive hemodialysis treatment was not effective. Given our poor understanding of LFS, it was regarded as bilateral basal ganglia pathology, and pulse hormone and gamma globulins therapy was initiated. The patient neurological symptoms improved, and the pa

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Bower, Geoffrey C. "Millimeter VLBI Observations of the Gamma-Ray Blazar NRAO 530." International Astronomical Union Colloquium 164 (1998): 41–42. http://dx.doi.org/10.1017/s0252921100044432.

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AbstractWe present here 3 epochs of 3 and 7 millimeter wavelength VLBI observations and 2 epochs of lower frequency VLBA imaging of the gamma-ray blazar NRAO 530. These observations document the evolution of the parsec scale jet in this source during the brightest flare in 3 decades. New jet components were created during the flare and are probably related to an increase in gamma-ray activity. The components travel at superluminal velocities, further confirming the connection between superluminal sources and gamma-ray blazars. The rapid evolution of the source makes tracking of components diff

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Wonho Lee and D. K. Wehe. "3-D isotropic imaging of environmental sources using a compact gamma camera." IEEE Transactions on Nuclear Science 51, no. 5 (2004): 2267–72. http://dx.doi.org/10.1109/tns.2004.834714.

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Cervantes, Hernán J., Christianne C. Cavinato, Letícia L. Campos, and Said R. Rabbani. "Gamma Knife® 3-D Dose Distribution Mapping by Magnetic Resonance Imaging." Applied Magnetic Resonance 39, no. 4 (2010): 357–64. http://dx.doi.org/10.1007/s00723-010-0166-4.

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Son, J. M., G. Oh, J. S. Lee, et al. "Prompt-gamma tomographic imaging for range verification in pencil beam-scanning proton therapy." Journal of Instrumentation 20, no. 06 (2025): P06030. https://doi.org/10.1088/1748-0221/20/06/p06030.

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Abstract This study aimed to develop a prompt-gamma imaging system to verify the range of proton beams. We designed an optimized collimation system and calculated the proton range using the GATE nuclear-medicine simulation toolkit (v. 9.1). An initial system, which was devised using protons without including specific equipment models, was employed to assess proton beams with energy ranges of 80, 90, 100, 110, and 120 MeV. The gamma-camera system design does not interfere with the nozzle structure of the treatment equipment. It consists of a pinhole collimator and a BGO scintillator and has a 1

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Watanabe, Yoichi, Chung K. Lee, and Bruce J. Gerbi. "Geometrical accuracy of a 3-tesla magnetic resonance imaging unit in Gamma Knife surgery." Journal of Neurosurgery 105, Supplement (2006): 190–93. http://dx.doi.org/10.3171/sup.2006.105.7.190.

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ObjectThe authors sought to evaluate and improve the geometrical accuracy of a 3-tesla magnetic resonance (MR) imaging unit used for Gamma Knife surgery (GKS).MethodsTo evaluate the geometrical accuracy of a Siemens Magnetom Trio 3-tesla MR imaging unit, two phantoms were used. Both phantoms were imaged with computed tomography (CT), a 1.5-tesla MR imaging unit (Siemens Avanto), and the 3-tesla MR imaging unit. A pair of orthogonal films was obtained with a radiotherapy simulator to validate the spatial coordinates of the marker positions determined with CT. The coordinates of the markers were

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Vetter, Kai, Ross Barnowski, Joshua W. Cates, et al. "Advances in Nuclear Radiation Sensing: Enabling 3-D Gamma-Ray Vision." Sensors 19, no. 11 (2019): 2541. http://dx.doi.org/10.3390/s19112541.

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The enormous advances in sensing and data processing technologies in combination with recent developments in nuclear radiation detection and imaging enable unprecedented and “smarter” ways to detect, map, and visualize nuclear radiation. The recently developed concept of three-dimensional (3-D) Scene-data fusion allows us now to “see” nuclear radiation in three dimensions, in real time, and specific to radionuclides. It is based on a multi-sensor instrument that is able to map a local scene and to fuse the scene data with nuclear radiation data in 3-D while the instrument is freely moving thro

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Bhandari, Harish B., Vladimir Gelfandbein, Stuart R. Miller, et al. "Large-Area Crystalline Microcolumnar LaBr$_{3}$:Ce for High-Resolution Gamma Ray Imaging." IEEE Transactions on Nuclear Science 60, no. 1 (2013): 3–8. http://dx.doi.org/10.1109/tns.2012.2213612.

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Cappello, Salvatore, Calogero Pace, Aldo Parlato, Salvatore Rizzo, and Elio Tomarchio. "Gamma-ray irradiation tests of CMOS sensors used in imaging techniques." Nuclear Technology and Radiation Protection 29, suppl. (2014): 14–19. http://dx.doi.org/10.2298/ntrp140ss14c.

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Technologically-enhanced electronic image sensors are used in various fields as diagnostic techniques in medicine or space applications. In the latter case the devices can be exposed to intense radiation fluxes over time which may impair the functioning of the same equipment. In this paper we report the results of gamma-ray irradiation tests on CMOS image sensors simulating the space radiation over a long time period. Gamma-ray irradiation tests were carried out by means of IGS-3 gamma irradiation facility of Palermo University, based on 60Co sources with different activities. To reduce the do

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Liscak, Roman. "Gamma Knife Radiosurgery for Vestibular Schwannomas." An International Journal of Otorhinolaryngology Clinics 3, no. 1 (2011): 57–64. http://dx.doi.org/10.5005/jp-journals-10003-1054.

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ABSTRACT The current gamma knife radiosurgery technique involves the use of magnetic resonance imaging for targeting, the application of a low marginal dose (usually between 12 and 13 Gy) and highly conformal treatment planning using multiple small isocenters. This technique achieves an average tumor control rate of 95% and open surgery is needed in fewer than 2 to 3% of patients treated by gamma knife. Facial nerve function preservation is achieved in up to 99% of cases and chance of preserving serviceable hearing is usually between a 70 to 80%. The introduction of ventriculoperitoneal draina

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KUIKKA, J. T., M. TENHUNEN-ESKELINEN, J. JURVELIN, and H. KIILI??NEN. "Physical performance of the Siemens MultiSPECT 3 gamma camera." Nuclear Medicine Communications 14, no. 6 (1993): 490–97. http://dx.doi.org/10.1097/00006231-199306000-00013.

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Jaafar, Abdullah, Mohd Khairi Mohd Said, Nur Aira Abdul Rahman, et al. "Development of a Gamma-Ray Process Tomography System for Hydrodynamic Characterisation of Multiphase Reactors." Applied Mechanics and Materials 83 (July 2011): 41–47. http://dx.doi.org/10.4028/www.scientific.net/amm.83.41.

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Gamma-ray computed tomography (CT) is a powerful non-invasive imaging technique for viewing an object in 2-D or 3-D cross-section images without the need to physically section it. The invention of CT technique revolutionised the field of medical diagnostic imaging because it provides more detailed and useful information than any previous non-invasive imaging technique. The method is increasingly used in industrial fields. This paper describes the development of a gamma-ray computed tomography system for imaging and visualising of industrial multiphase reactors. The theoretical aspects of CT sc

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Mukai, Atsushi, Minato Kanda, Kenji Shimazoe та ін. "Development of Unmanned Remote System to Find Radiation Sources Based on 4π Gamma Imaging". Journal of Robotics and Mechatronics 36, № 1 (2024): 79–87. http://dx.doi.org/10.20965/jrm.2024.p0079.

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A prototype system based on a combination of 4π sensitive gamma imaging and simultaneous localization and mapping (SLAM) was developed to find unknown radiation source(s) rapidly. The system consisted of a spherical visible camera, a three-dimensional light detection and ranging, a CdTe pixel array detector for 4π gamma imaging, a portable battery, and a control laptop personal computer; these were mounted on an unmanned vehicle. In a search area of 16 × 16 m2 with a height of 3 m, the prototype system successfully demonstrated the finding of a 137Cs point source with an activity of 0.67 MBq i

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Das, Biswajit, R. Palit, R. Donthi, et al. "Development of a position-sensitive fast scintillator (LaBr₃(Ce)) detector setup for gamma-ray imaging application." EPJ Web of Conferences 253 (2021): 11005. http://dx.doi.org/10.1051/epjconf/202125311005.

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We have characterized a Cerium doped Lanthanum Bromide (LaBr3(Ce) ) crystal coupled with the position-sensitive photo-multiplier system for the gamma-ray imaging application. One can use this detector set-up for the scanning of high purity germanium detectors for pulse shape analysis in gamma-ray spectroscopy experiments and the image formation of an object by Compton back-scattering . The sensor has been tested for energy, timing and position information of the gamma-rays interacting within the detector crystal. The GEANT4 simulation results are consistent with the experimental results. We ha

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Zhang, Jun, Ziting Fan, Xile Zhang, Ruijie Yang, and Junhai Wen. "Development of an Electronic Portal Imaging Device Dosimetry Method." Diagnostics 11, no. 9 (2021): 1654. http://dx.doi.org/10.3390/diagnostics11091654.

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Support arm backscatter and off-axis effects of an electronic portal imaging device (EPID) are challenging for radiotherapy quality assurance. Aiming at the issue, we proposed a simple yet effective method with correction matrices to rectify backscatter and off-axis responses for EPID images. First, we measured the square fields with ionization chamber array (ICA) and EPID simultaneously. Second, we calculated the dose-to-pixel value ratio and used it as the correction matrix of the corresponding field. Third, the correction value of the large field was replaced with that of the same point in

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Madhok, Ricky, Douglas Kondziolka, John C. Flickinger, and L. Dade Lunsford. "GAMMA KNIFE RADIOSURGERY FOR FACIAL SCHWANNOMAS." Neurosurgery 64, no. 6 (2009): 1102–5. http://dx.doi.org/10.1227/01.neu.0000343743.20297.fb.

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Abstract OBJECTIVE Patients who have a schwannoma of the facial nerve (facial schwannoma, facial neuroma) can be managed with observation, surgical resection, stereotactic radiosurgery, or fractionated radiotherapy. Attempted complete resection is associated with facial weakness. The role of radiosurgery in these patients remains to be defined. METHODS We reviewed the clinical and imaging outcomes in patients who underwent gamma knife radiosurgery for a facial schwannoma. RESULTS Six patients had radiosurgery and were followed for a mean and median of 46.6 and 61.5 months, respectively (21–85

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Baek, Seung-Hyeop, Sang-Hyoun Choi, Moo-Jae Han, et al. "Clinical Efficacy of an Electronic Portal Imaging Device versus a Physical Phantom Tool for Patient-Specific Quality Assurance." Life 12, no. 11 (2022): 1923. http://dx.doi.org/10.3390/life12111923.

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Pre-treatment patient-specific quality assurance (QA) is critical to prevent radiation accidents. The electronic portal imaging device (EPID) is a dose measurement tool with good resolution and a low volume-averaging effect. EPIbeam—an EPID-based portal dosimetry software—has been newly installed in three institutions in Korea. This study evaluated the efficacy of the EPID-based patient-specific QA tool versus the PTW729 detector (a previously used QA tool) based on gamma criteria and planning target volume (PTV). A significant difference was confirmed through the R statistical analysis softwa

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Cussonneau, J. P., J. M. Abaline, S. Acounis, et al. "3$\gamma $ Medical Imaging with a Liquid Xenon Compton Camera and $^{44}$Sc Radionuclide." Acta Physica Polonica B 48, no. 10 (2017): 1661. http://dx.doi.org/10.5506/aphyspolb.48.1661.

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Brown, Steven T., David Goodman, Jiyang Chu, Bennett Williams, Martin R. Williamson, and Zhong He. "Time-Encoded Gamma-Ray Imaging Using a 3-D Position-Sensitive CdZnTe Detector Array." IEEE Transactions on Nuclear Science 67, no. 2 (2020): 464–72. http://dx.doi.org/10.1109/tns.2019.2953182.

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Liu, Xiao, Hui Liu, Li Cheng, et al. "A 3-dimensional stationary cascade gamma-ray coincidence imager." Physics in Medicine & Biology 66, no. 22 (2021): 225001. http://dx.doi.org/10.1088/1361-6560/ac311b.

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Shehaby, Amr El, Jeremy C. Ganz, Wael A. Reda, and Ayman Hafez. "Temporary symptomatic swelling of meningiomas following gamma knife surgery." Journal of Neurosurgery 102, Special_Supplement (2005): 293–96. http://dx.doi.org/10.3171/sup.2005.102.s_supplement.0293.

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✓ In two patients in whom gamma knife surgery was performed for meningiomas clinically significant volume increases were observed in the first 3 months after treatment. Clinical examination and various imaging studies form the basis of the report in these patients. In each case, the volume increase was temporary.

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Scopinaro, Francesco, Roberto Pani, Alessandro Soluri, et al. "Detection of Sentinel Node in Breast Cancer: Pilot Study with the Imaging Probe." Tumori Journal 86, no. 4 (2000): 329–31. http://dx.doi.org/10.1177/030089160008600420.

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The commonly used gamma probes are easy to use but also give rough information when employed in radioisotope-guided surgery. When images are required for exact localization, a gamma camera as well as a probe have to be used. Position-sensitive photomultipliers have contemporaneously allowed high-resolution scintigraphy and miniaturization of gamma cameras. We have assembled a miniature gamma camera with a 1-square-inch field of view and an intrinsic resolution of about 1 mm. When the minicamera is collimated with a large-holed, highly sensitive collimator, it acquires a spatial resolution of 3

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Zulkafal, Hafiz Muhibb ullah, Allah Ditta Khalid, Sajid Anees Minhas, et al. "RapidArc treatment planning quality assurance using electronic portal imaging device for cervical cancer." Journal of Radiotherapy in Practice 19, no. 2 (2019): 139–44. http://dx.doi.org/10.1017/s1460396919000542.

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AbstractPurpose:The main objective of this study is to assure the quality of cervical cancer treatment plans using an electronic portal imaging device (EPID) in RapidArc techniques.Materials and Methods:Fifteen cases of cervical cancer patients undergoing RapidArc technique were selected to evaluate the quality assurance (QA) of their treatment. The computed tomography (CT) of each patient was obtained with 3-mm-slice thickness and transferred to the Eclipse treatment planning system. The prescribed dose (PD) of 50·4 Gy with 1·8 Gy per fraction to planning target volume (PTV) was used for each

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Labagnoy, Yasmine Joy M., Sornjarod Oonsiri, Mananchaya Vimolnoch, and Sakda Kingkaew. "Assessment of the Dosimetric Performance of the Mobius3D against Portal Dose Measurements in Patient-specific Quality Assurance." Journal of Medical Physics 48, no. 4 (2023): 350–57. http://dx.doi.org/10.4103/jmp.jmp_19_23.

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Aim: The Mobius3D software addresses limitations lacking in measurement-based methods in patient-specific quality assurance (QA). The objective of this study was to validate its dosimetric performance against conventionally used portal dose measurements using gamma analysis and confidence limits. Materials and Methods: A total of 240 patient-specific QA plans for the Varian Halcyon linear accelerator were collected. The Mobius3D software was commissioned through beam data and plan verification. All plans underwent QA through the electronic portal imaging device, coupled with the Portal Dosimet

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Madsen, Jan L., Katarina Sjögreen-Gleisner, Dennis R. Elema, et al. "Gamma camera imaging for studying intestinal absorption and whole-body distribution of selenomethionine." British Journal of Nutrition 111, no. 3 (2013): 547–53. http://dx.doi.org/10.1017/s0007114513002559.

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Se metabolism in humans is not well characterised. Currently, the estimates of Se absorption, whole-body retention and excretion are being obtained from balance and tracer studies. In the present study, we used gamma camera imaging to evaluate the whole-body retention and distribution of radiolabelled selenomethionine (SeMet), the predominant form of Se present in foods. A total of eight healthy young men participated in the study. After consumption of a meal containing 4 MBq [75Se]l-SeMet ([75Se]SeMet), whole-body gamma camera scanning was performed for 45 min every hour over a 6 h period, ev

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Shi, Wei-Qun, Jun-Chen Dong, Yu-Fen Zhao, and Yan-Mei Li. "Hydroxylation of 3-Nitrotyrosine and Its Derivatives by Gamma Irradiation." Radiation Research 166, no. 4 (2006): 639–45. http://dx.doi.org/10.1667/rr0612.1.

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Qi, Mingying, Guozhong Wu, Shimou Chen, and Yaodong Liu. "Gamma Radiolysis of Ionic Liquid 1-Butyl-3-methylimidazolium Hexafluorophosphate." Radiation Research 167, no. 5 (2007): 508–14. http://dx.doi.org/10.1667/rr0727.1.

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Acerbi, Fabio, Aramis Raiola, Cyril Alispach, et al. "Compact and Handheld SiPM-Based Gamma Camera for Radio-Guided Surgery and Medical Imaging." Instruments 9, no. 2 (2025): 14. https://doi.org/10.3390/instruments9020014.

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In the continuous pursuit of minimally invasive interventions while ensuring a radical excision of lesions, Radio-Guided Surgery (RGS) has been for years the standard for image-guided surgery procedures, such as the Sentinel Lymph Node biopsy (SLN), Radio-guided Seed Localization (RSL), etc. In RGS, the lesion has to be identified precisely, in terms of position and extension. In such a context, going beyond the current one-point probes, introducing portable but high-resolution cameras, handholdable by the surgeon, would be highly beneficial. We developed and tested a novel compact, low-power,

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Maraghechi, Borna, Jack Davis, Shyam Badu, Andre Fleck, Johnson Darko, and Ernest Osei. "Retrospective analysis of portal dosimetry pre-treatment quality assurance of prostate volumetric-modulated arc therapy (VMAT) plans." Journal of Radiotherapy in Practice 17, no. 1 (2017): 44–52. http://dx.doi.org/10.1017/s1460396917000486.

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AbstractBackgroundElectronic portal imaging device (EPID) offers high-resolution digital image that can be compared with a predicted portal dose image. A very common method to quantitatively compare a measured and calculated dose distribution that is routinely used for quality assurance (QA) of volumetric-modulated arc therapy (VMAT) and intensity-modulated radiation therapy treatment plans is the evaluation of the gamma index. The purpose of this work was to evaluate the gamma passing rate (%GP), maximum gamma (γmax), average gamma (γave), maximum dose difference (DDmax) and the average dose

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Fang, Ke, Francis Halzen, and Dan Hooper. "Cascaded Gamma-Ray Emission Associated with the KM3NeT Ultrahigh-energy Event KM3-230213A." Astrophysical Journal Letters 982, no. 1 (2025): L16. https://doi.org/10.3847/2041-8213/adbbec.

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Abstract A neutrino-like event with an energy of ∼220 PeV was recently detected by the KM3NeT/ARCA telescope. If this neutrino comes from an astrophysical source or from the interaction of an ultrahigh-energy cosmic ray in the intergalactic medium, the ultrahigh-energy gamma rays that are coproduced with the neutrinos will scatter with the extragalactic background light, producing an electromagnetic cascade and resulting in emission at GeV-to-TeV energies. In this Letter, we compute the gamma-ray flux from this neutrino source considering various source distances and strengths of the intergala

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Payne, Bryan Rankin, Dheerendra Prasad, György Szeifert, Melita Steiner, and Ladislau Steiner. "Gamma surgery for intracranial metastases from renal cell carcinoma." Journal of Neurosurgery 92, no. 5 (2000): 760–65. http://dx.doi.org/10.3171/jns.2000.92.5.0760.

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Object. The goal of this study was to evaluate the effectiveness and limitations of gamma surgery (GS) in the treatment of renal cell carcinoma that has metastasized to the brain.Methods. The authors performed a retrospective analysis of a consecutive series of 21 patients with 37 metastatic brain deposits from renal cell carcinoma who were treated with GS at the University of Virginia from 1990 to 1999.Clinical data were available in all patients. No patient died of progression of intracranial disease or deteriorated neurologically following GS. Eight patients clinically improved. Follow-up i

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Abbene, Leonardo, Fabio Principato, Antonino Buttacavoli, et al. "Potentialities of High-Resolution 3-D CZT Drift Strip Detectors for Prompt Gamma-Ray Measurements in BNCT." Sensors 22, no. 4 (2022): 1502. http://dx.doi.org/10.3390/s22041502.

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Recently, new high-resolution cadmium–zinc–telluride (CZT) drift strip detectors for room temperature gamma-ray spectroscopic imaging were developed by our group. The CZT detectors equipped with orthogonal anode/cathode collecting strips, drift strips and dedicated pulse processing allow a detection area of 6 × 20 mm2 and excellent room temperature spectroscopic performance (0.82% FWHM at 661.7 keV). In this work, we investigated the potentialities of these detectors for prompt gamma-ray spectroscopy (PGS) in boron neutron capture therapy (BNCT). The detectors, exploiting the measurement of th

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Monkhoev, R., M. Ternovoy, I. Astapov, et al. "Geant4 simulation of the Tunka-Grande experiment." Journal of Physics: Conference Series 2103, no. 1 (2021): 012001. http://dx.doi.org/10.1088/1742-6596/2103/1/012001.

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Abstract The Tunka-Grande array is part of a single experimental complex, which also includes the Tunka-133 and TAIGA-HiScORE (High Sensitivity COsmic Rays and gamma Explorer) wide-angle Cherenkov arrays, TAIGA-IACT array (Imaging Atmospheric Cherenkov Telescope) and TAGA-MUON scintillation array. This complex is located in the Tunka Valley (Buryatia Republic, Russia), 50 km from Lake Baikal. It is designed to study the energy spectrum and the mass composition of charged cosmic rays in the energy range 100 TeV - 1000 PeV, to search for diffuse gamma rays above 100 TeV and to study local source

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Egarievwe, Stephen U., Utpal N. Roy, Carmella A. Goree, Benicia A. Harrison, Jeanette Jones, and Ralph B. James. "Ammonium Fluoride Passivation of CdZnTeSe Sensors for Applications in Nuclear Detection and Medical Imaging." Sensors 19, no. 15 (2019): 3271. http://dx.doi.org/10.3390/s19153271.

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Cadmium zinc telluride selenide (Cd1−xZnxTe1−ySey or CZTS) is one of the emerging CdTe-based semiconductor materials for detecting X- and gamma-ray radiation at or near room temperature (i.e., without cryogenic cooling). Potential applications of CZTS sensors include medical imaging, X-ray detection, and gamma-ray spectroscopy. Chemical passivation of CZTS is needed to reduce the conductivity of Te-rich surfaces, which reduces the noise and improves the device performance. In this study, we focus on the effect of surface passivation of CZTS using a 10% aqueous solution of ammonium fluoride. Th

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Song, Y., M. Zhang, B. J. Duan, et al. "A high-speed radiation imaging system based on liquid scintillator filled capillary arrays." Review of Scientific Instruments 93, no. 3 (2022): 033702. http://dx.doi.org/10.1063/5.0066686.

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A high-speed radiation imaging system based on an image converter of liquid scintillator filled capillary arrays has been developed, which is sensitive to x rays, gamma rays, and neutrons. This imaging system has advantages of both high spatial resolution and high sensitivity because increasing the thickness of the image converter only leads to little deterioration on imaging resolution. The capillary arrays have dimensions of 150 mm diameter and 50 mm thickness, with 100 µm diameter of each capillary. The fluorescence decay time of the filled liquid scintillator based on the mixture of p-xyle

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Maraghechi, Borna, Jack Davis, Nicholas Mitchell, et al. "The sensitivity of gamma index analysis to detect multileaf collimator (MLC) positioning errors using Varian TrueBeam EPID and ArcCHECK for patient-specific prostate volumetric-modulated arc therapy (VMAT) quality assurance." Journal of Radiotherapy in Practice 17, no. 1 (2017): 66–77. http://dx.doi.org/10.1017/s1460396917000425.

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AbstractBackgroundDue to the increased degree of modulation and complexity of volumetric-modulated arc therapy (VMAT) plans, it is necessary to have a pre-treatment patient-specific quality assurance (QA) programme. The gamma index is commonly used to quantitatively compare two dose distributions. In this study we investigated the sensitivity of single- and multi-gamma criteria techniques to detect multileaf collimator (MLC) positioning errors using the Varian TrueBeam Electronic Portal Imaging DeviceTM (EPID) dosimetry and the ArcCHECKTM device.Materials and methodsAll active MLC positions of

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NIIDA, H., Y. NAKAYAMA, and K. YAGI. "244. Investigation of Brain 3-D Surface Imaging using PRISM-3000 Three-Head Gamma Camera System." Japanese Journal of Radiological Technology 49, no. 8 (1993): 1269. http://dx.doi.org/10.6009/jjrt.kj00003324832.

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Kim, Myoung Hyoun, Seul-Gi Kim, and Dae-Weung Kim. "A novel dual-labeled small peptide as a multimodal imaging agent for targeting wild-type EGFR in tumors." PLOS ONE 17, no. 2 (2022): e0263474. http://dx.doi.org/10.1371/journal.pone.0263474.

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The epidermal growth factor receptor (EGFR) is over-expressed in various human cancer. The over-expression of EGFR in tumors is an excellent target for the development of cancer imaging agents. In the present study, we developed Tc-99m SYPIPDT-GHEG-ECG-K-tetramethylrhodamine (SYPIPDT-ECG-TAMRA) as a molecular imaging agent targeting wild-type EFGR (wtEGFR)-positive tumor cells, and verified its feasibility as molecular imaging agent. SYPIPDT-ECG-TAMRA was synthesized using Fmoc solid-phase peptide synthesis. The radiolabeling of SYPIPDT-ECG-TAMRA with Tc-99m was accomplished using ligand excha

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Jensen, Morten B., Peter Balling, Hans L. Riis, et al. "Characterisation and application of three-dimensional silicone-based radiochromic dosimetry in 1.5 T magnetic resonance imaging-guided radiotherapy." Journal of Physics: Conference Series 2630, no. 1 (2023): 012030. http://dx.doi.org/10.1088/1742-6596/2630/1/012030.

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Abstract The magnetic field in magnetic resonance imaging-guided radiotherapy (MRgRT) systems influences the three-dimensional (3D) dose deposition and hence the delivered dose distributions. The aim of this study was to investigate the dose-rate dependency and dose response of silicone-based radiochromic dosimeters for photon irradiation in the precense of a magnetic field using a 1.5 T MRgRT system. Additionally, the study aimed to provide a proof of the concept of radiotherapy treatment based on a treatment plan calculated on magnetic resonance imaging rather than a computed tomography (CT)

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Guo, Fanqing. "3-D treatment planning system—Leksell Gamma Knife treatment planning system." Medical Dosimetry 43, no. 2 (2018): 177–83. http://dx.doi.org/10.1016/j.meddos.2018.03.001.

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Kooshkabadi, Ali, L. Dade Lunsford, Daniel Tonetti, John C. Flickinger, and Douglas Kondziolka. "Gamma Knife thalamotomy for tremor in the magnetic resonance imaging era." Journal of Neurosurgery 118, no. 4 (2013): 713–18. http://dx.doi.org/10.3171/2013.1.jns121111.

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Object The surgical management of disabling tremor has gained renewed vigor with the availability of deep brain stimulation. However, in the face of an aging population of patients with increasing surgical comorbidities, noninvasive approaches for tremor management are needed. The authors' purpose was to study the technique and results of stereotactic radiosurgery performed in the era of MRI targeting. Methods The authors evaluated outcomes in 86 patients (mean age 71 years; number of procedures 88) who underwent a unilateral Gamma Knife thalamotomy (GKT) for tremor during a 15-year period tha

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Zwierzchowski, Grzegorz, Grzegorz Bieleda, and Janusz Skowronek. "Quality assurance procedures based on dosimetric, gamma analysis as a fast reliable tool for commissioning brachytherapy treatment planning systems." Radiology and Oncology 51, no. 4 (2017): 469–74. http://dx.doi.org/10.1515/raon-2017-0050.

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Abstract Background Fast and easily repeatable methods for commissioning procedures for brachytherapy (BT) treatment planning systems (TPS) are needed. Radiochromic film dosimetry with gamma analysis is widely used in external beam quality assurance (QA) procedures and planar film dosimetry is also increasingly used for verification of the dose distribution in BT applications. Using the gamma analysis method for comparing calculated and measured dose data could be used for commissioning procedures of the newly developed TG-186 and MBDCA calculation algorithms. The aim of this study was dosimet

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Pittori, Carlotta. "AGILE Highlights after Six Years in Orbit." Acta Polytechnica CTU Proceedings 1, no. 1 (2014): 157–62. http://dx.doi.org/10.14311/app.2014.01.0157.

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AGILE is an ASI space mission in collaboration with INAF, INFN and CIFS, dedicated to the observation of the gamma-ray Universe in the 30 MeV - 50 GeV energy range, with simultaneous X-ray imaging capability in the 18-60 keV band. The AGILE satellite was launched on April 23rd, 2007, and produced several important scientic results, among which the unexpected discovery of strong <br />ares from the Crab Nebula. This discovery won to the AGILE PI and the AGILE Team the Bruno Rossi Prize for 2012 by the High Energy Astrophysics division of the American Astronomical Society. Thanks to its sk

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Omori, Yasutaka, Atsuyuki Sorimachi, Manlaijav Gun-Aajav, et al. "ELEVATION OF GAMMA DOSE RATE BY CONSTRUCTION OF THE ASIAN HIGHWAY 3 (AH3) BETWEEN ULAANBAATAR AND SAINSHAND, MONGOLIA." Radiation Protection Dosimetry 184, no. 1 (2018): 127–34. http://dx.doi.org/10.1093/rpd/ncy173.

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Abstract The present study aimed at examining changes of gamma radiation level associated with road construction in Mongolia. A car-borne survey of gamma dose rate was made for a paved, ~450-km long part of the Asian Highway 3 between Ulaanbaatar and Sainshand. The gamma dose rates ranged from 48 to 173 nGy/h. Elevation of the gamma dose rates was observed only on a 86-km long segment of the survey route which was newly constructed from 2011 to 2013. The gamma dose rates over the newer paved segment were twice as high as those over the bare dirt surface alongside it. Outdoor measurements of ga

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Patt, Bradley E., Jan S. Iwanczyk, Martin P. Tornai, Craig S. Levin, and Edward J. Hoffman. "Development of a Mercuric Iodide Detector Array For In-Vivo X-Ray Imaging." Advances in X-ray Analysis 38 (1994): 615–24. http://dx.doi.org/10.1154/s0376030800018310.

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Abstract A nineteen element mercuric iodide (HgI2) detector array has been developed in order to investigate the potential of using this technology for in-vivo x-ray and gamma-ray imaging. A prototype cross-grid detector array was constructed with hexagonal pixels of 1.9 mm diameter (active area = 3.28 mm2) and 0.2 mm thick septa. The overall detector active area is roughly 65 mm2. A detector thickness of 1.2 mm was used to achieve about 100% efficiency at 60 keV and 67% efficiency at 140 keV The detector fabrication, geometry and structure were optimized for charge collection and to minimize

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