Results 31 to 40 of about 4,563 (171)

One-Dimensional Beam Scanning Transmitarray Lens Antenna Fed by Microstrip Linear Array

IEEE Access, 2019
This paper proposed a one-dimensional beam scanning transmitarray lens antenna fed by a microstrip linear array antenna which owns a wide pattern in the plane orthogonal to the array axis and a narrow pattern in the plane that includes the array axis ...
Na Kou, Shixing Yu, Zhao Ding, Zhengping Zhang   +3 more
doaj   +1 more source

Determination of Integral Depth Dose in Proton Pencil Beam Using Plane-parallel Ionization Chambers [PDF]

International Journal of Particle Therapy, 2022
Purpose: This study aimed to determine the integral depth-dose curves and assess the geometric collection efficiency of different detector diameters in proton pencil beam scanning.
Phatthraporn Thasasi, MSc, Sirinya Ruangchan, PhD, Puntiwa Oonsiri, MSc, Sornjarod Oonsiri, PhD   +3 more
doaj   +1 more source

Innovations and the Use of Collimators in the Delivery of Pencil Beam Scanning Proton Therapy [PDF]

International Journal of Particle Therapy, 2021
The development of collimating technologies has become a recent focus in pencil beam scanning (PBS) proton therapy to improve the target conformity and healthy tissue sparing through field-specific or energy-layer-specific collimation. Given the growing popularity of collimators for low-energy treatments, the purpose of this work was to summarize the ...
Daniel E. Hyer, PhD, Laura C. Bennett, MS, Theodore J. Geoghegan, MS, Martin Bues, PhD, Blake R. Smith, PhD   +4 more
openaire   +3 more sources

Inter-comparison of Dose Distributions Calculated by FLUKA, GEANT4, MCNP, and PHITS for Proton Therapy

EPJ Web of Conferences, 2017
The dose distributions from proton pencil beam scanning were calculated by FLUKA, GEANT4, MCNP, and PHITS, in order to investigate their applicability in proton radiotherapy.
Yang Zi-Yi, Tsai Pi-En, Lee Shao-Chun, Liu Yen-Chiang, Chen Chin-Cheng, Sato Tatsuhiko, Sheu Rong-Jiun   +6 more
doaj   +1 more source

Beam Position Projection Algorithms in Proton Pencil Beam Scanning. [PDF]

Cancers (Basel)
Beam position uncertainties along the beam trajectory arise from the accelerator, beamline, and scanning magnets (SMs). They can be monitored in real time, e.g., through strip ionization chambers (ICs), and treatments can be paused if needed. Delivery is more reliable and accurate if the beam position is projected from monitored nozzle parameters to ...
Nesteruk KP, Bradley SG, Kooy HM, Clasie BM.   +3 more
europepmc   +3 more sources

Mapping initial and general recombination in scanning proton pencil beams

Physics in Medicine & Biology, 2020
Abstract The ion recombination is examined in parallel-plate ionization chambers in scanning proton beams at the Danish Centre for Particle Therapy and the Skandion Clinic. The recombination correction factor k s
J B Christensen, E Almhagen, L Stolarczyk, M Liszka, G G Hernandez, N Bassler, O Nørrevang, A Vestergaard   +7 more
openaire   +2 more sources

Collimating individual beamlets in pencil beam scanning proton therapy, a dosimetric investigation

Frontiers in Oncology, 2022
The purpose of this work is to investigate collimating individual proton beamlets from a dosimetric perspective and to introduce a new device concept, the spot scanning aperture (SSA).
Jason Holmes, Jiajian Shen, Samir H. Patel, William W. Wong, Robert L. Foote, Martin Bues, Wei Liu   +6 more
doaj   +1 more source

Pencil beam scanning proton therapy for pediatric intracranial ependymoma [PDF]

Journal of Neuro-Oncology, 2016
To assess the clinical outcome and late side effect profile of pencil beam scanning proton therapy (PT) delivered to children with intracranial ependymoma. Between July-2004 and March-2013, 50 patients with intracranial ependymoma (n = 46, grade 3) received involved-field PT at Paul Scherrer Institute (PSI).
Carmen Ares, Francesca Albertini, Martina Frei-Welte, Alessandra Bolsi, Michael A. Grotzer, Gudrun Goitein, Damien C. Weber   +6 more
openaire   +5 more sources

Successful Implementation of Image-Guided Pencil-Beam Scanning Proton Therapy in Medulloblastomas

Diagnostics, 2023
Medulloblastoma is the most common malignant brain tumour in children, while much rarer in adults. Although the prognosis and outcomes have greatly improved in the era of modern multidisciplinary management, long-term treatment-induced toxicities are ...
Anindita Das, Utpal Gaikwad, Ganapathy Krishnan, Adhithyan Rajendran, Sushama Patil, Preethi Subramaniam, Uday Krishna, Manoj G. Wakde, Srinivas Chilukuri, Rakesh Jalali   +9 more
doaj   +1 more source

Characterization and performance evaluation of the first-proton therapy facility in India

Journal of Medical Physics, 2020
Purpose: The purpose of this study is to evaluate the performance characteristic of volumetric image-guided dedicated-nozzle pencil beam-scanning proton therapy (PT) system.
Dayananda Sharma Shamurailatpam, A Manikandan, K Ganapathy, M P Noufal, Kartikeshwar C Patro, T Rajesh, R Jalali   +6 more
doaj   +1 more source