Results 71 to 80 of about 4,599 (171)

Dynamic control of carbon‐ion radiation dose distribution amid respiratory motion challenges: A review of prediction research using geant4 and deep learning physics‐constrained models

Journal of Applied Clinical Medical Physics, Volume 27, Issue 11, November 2026.
Abstract Background Carbon ion radiotherapy (CIRT) offers superior dose conformity and biological effectiveness; however, its precision is highly sensitive to respiratory motion, leading to dose uncertainty and interplay effects that compromise treatment accuracy.
Jianhua Ding, Peng Li, Chai Hong Yeong
wiley   +1 more source

Experimental fluence‐modulated proton computed tomography by pencil beam scanning [PDF]

Medical Physics, 2018
PurposeThis experimental study is aimed at demonstrating, using a simple cylindrical water phantom, the feasibility of fluence‐modulated proton computed tomography (FMpCT) by pencil beam scanning (PBS) proton computed tomography (pCT).MethodsThe phase II pCT prototype of the Loma Linda U. and U. C. Santa Cruz was operated using the PBS beam line of the
Dedes, George, Johnson, Robert P, Pankuch, Mark, Detrich, Nick, Pols, Willemijn MA, Rit, Simon, Schulte, Reinhard W, Parodi, Katia, Landry, Guillaume   +8 more
openaire   +4 more sources

Proton microbeam radiotherapy with scanned pencil-beams – Monte Carlo simulations [PDF]

Physica Medica, 2015
Irradiation, delivered by a synchrotron facility, using a set of highly collimated, narrow and parallel photon beams spaced by 1 mm or less, has been termed Microbeam Radiation Therapy (MRT). The tolerance of healthy tissue after MRT was found to be better than after standard broad X-ray beams, together with a more pronounced response of malignant ...
Kłodowska, M., Olko, P., Waligórski, M.P.R.   +2 more
openaire   +2 more sources

In Vivo 31P‐MRS of the Human Orthotopic Kidney at 3 Tesla

NMR in Biomedicine, Volume 39, Issue 11, November 2026.
31P‐MRS of healthy human orthotopic kidneys at 3T yielded improved spectral quality within a clinically feasible scan time. The resulting summed spectrum characterizes normal renal phosphorus metabolism and may serve as a reference for detecting metabolic alterations associated with kidney disease and transplantation.
Eva Carlsson, Jan Weis, Maria K. Svensson, Maysam Jafar, Per Liss, Amir Sedigh   +5 more
wiley   +1 more source

SRS/SBRT commissioning process with a hybrid beam data model in new preconfigured CyberKnife system

Journal of Applied Clinical Medical Physics, Volume 27, Issue 10, October 2026.
Abstract Background A new preconfigured CyberKnife system was introduced to improve the SRS/SBRT commissioning efficiency. The vendor provides a reference beam data set, termed “beam data model (BDM)”, and recommends its validation and combination with measurement data to develop a hybrid beam data model (h‐BDM).
Mikoto Tamura, Yasumasa Nishimura, Tomohiro Matsuura, Yuta Inosaka, Yoshiyuki Sadahira, Ayano Akamine, Kyomi Inoue, Seiki Nishino, Hirokazu Mizuno, Iori Sumida, John M. Noll   +10 more
wiley   +1 more source

Proton beam therapy in paediatric radiation oncology: Defining the limitations, uncertainties and optimisation of treatment plans

EJC Paediatric Oncology
Proton Beam Therapy (PBT) is an increasingly utilised modality for treating tumours by utilising the physical properties of accelerated proton beams. This review explores the development of PBT, its dosimetric advantages over conventional x-ray-based ...
C.S.M. Gillies, P. Lim, C. Dunlea, B. Timmermann, C. Alapetite, S. Bolle, I.F. Kristensen, K. Seiersen, Y. Lassen-Ramshad   +8 more
doaj   +1 more source

Development of Optical Fiber Based Measurement System for the Verification of Entrance Dose Map in Pencil Beam Scanning Proton Beam

Sensors, 2018
This study describes the development of a beam monitoring system for the verification of entrance dose map in pencil beam scanning (PBS) proton therapy based on fiber optic radiation sensors (FORS) and the validation of this system through a feasibility ...
Jaeman Son, Se Byeong Lee, Youngkyung Lim, Sung Yong Park, Kwanho Cho, Myonggeun Yoon, Dongho Shin   +6 more
doaj   +1 more source

Tradeoffs in the design of a spaceborne scanning pencil beam scatterometer: application to SeaWinds

IEEE Transactions on Geoscience and Remote Sensing, 1997
SeaWinds is a spaceborne wind scatterometer to be flown on the second Japanese Advanced Earth Observing Satellite (ADEOS-II) in 1999. An important international element of NASA's Earth Observing System (EOS), SeaWinds is an advanced follow-on to the NASA scatterometer (NSCAT) on the first ADEOS platform.
Michael W. Spencer, Chialin Wu, David G. Long   +2 more
openaire   +3 more sources

Cardio-respiratory-gated proton pencil beam scanning for cardiac ablation: workflow and end-to-end validation

Frontiers in Oncology
BackgroundStereotactic Arrhythmia Radiotherapy (STAR) offers a non-invasive alternative for ventricular tachycardia ablation, yet motion management remains a critical challenge. While respiratory gating is established, cardiac gating requires a dedicated
Nicolas Depauw, Felicitas Bijari, Felicitas Bijari, Ethan Cascio, Evan Driscoll, Adriano Garonna, Jagdip Kang, Helen Deng, Hyeongseok Kim, Hyeongseok Kim, Marina Macdonald-Soccorso, Willian Nett, Marc Normandin, Matthieu Pellissier-Tanon, Rebecca Woodcock, Koushiar Yaghoubian, Georges El Fakhri, Robert Levine, H.Immo Lehmann, H.Immo Lehmann, Yen-Lin Chen, Kyung-Wook Jee   +21 more
doaj   +1 more source

Dose comparison of proton beam therapy with and without a multileaf collimator in the treatment of multiple hepatocellular carcinoma

Physics and Imaging in Radiation Oncology
Background and purpose: Proton beam therapy (PBT) offers dosimetric advantages over conventional photon-based radiation therapy in treating hepatocellular carcinoma (HCC) because it more effectively spares normal liver tissue. This study investigated the
Fang-Jing Li, Jen-Yu Cheng, Yu-Ming Wang, Meng-Wei Ho, Bing-Shen Huang   +4 more
doaj   +1 more source