Results 61 to 70 of about 801,823 (212)

Assessing the role of plan complexity and target geometry through multi‐institutional gel based end‐to‐end QA in multi‐focal single isocenter stereotactic radiosurgery

Journal of Applied Clinical Medical Physics, Volume 27, Issue 10, October 2026.
Abstract Background Single‐isocenter stereotactic radiosurgery enables efficient treatment of multiple brain metastases (SI‐MBM SRS), but demands high geometric accuracy. Plan complexity metrics are increasingly used as indicators for quality assurance (QA) performance, however their applicability to SRS remains uncertain, particularly in the context ...
Despoina Stasinou, Kalliopi Platoni, Vasiliki Margaroni, Kyveli Zourari, Emmanouil Zoros, Niko Papanikolaou, Evangelos Pappas   +6 more
wiley   +1 more source

Characterization of a prototype MR-compatible Delta4 QA-system in a 1.5 tesla MR-linac [PDF]

, 2018
To perform patient plan quality assurance (QA) on a newly installed MR-linac (MRL) it is necessary to have an MR-compatible QA device. An MR compatible device (MR-Delta4) has been developed together with Scandidos AB (Uppsala, Sweden).
Houweling, Anette, Wolthaus, Jochem W H, Seravalli, Enrica, van Rooij, Rob, de Vries, Wilfred J H, Woodings, Simon J, Raaymakers, Bas W, Lagendijk, JJW   +7 more
core   +1 more source

Case Report: MR-Guided Adaptive Radiotherapy, Some Room to Maneuver

Frontiers in Oncology, 2022
BackgroundA magnetic resonance linear accelerator (MR-Linac) provides superior soft tissue contrast to evaluate inter- and intra-fraction motion and facilitate online adaptive radiation therapy (ART).
Winnie Li, Winnie Li, Jeff Winter, Jeff Winter, Jerusha Padayachee, Jennifer Dang, Vickie Kong, Vickie Kong, Peter Chung, Peter Chung   +9 more
doaj   +1 more source

Seeing radiation: Applications of an imaging survey meter in radiation oncology

Journal of Applied Clinical Medical Physics, Volume 27, Issue 10, October 2026.
Abstract Background and purpose Radiation shielding surveys require location and evaluation of radiation hotspots in shielding barriers. This process is normally done by using a conventional survey meter and slowly moving the survey meter manually across the face of the barrier.
Patrick N. McDermott, Robert C. Halford, Brayden Halvorson, Ian Lake, Jian Liang, Akin Ogretici, Avery Peterson, Evelyn Sebastian, Xiangkun Xu   +8 more
wiley   +1 more source

Ionization chamber correction factors for MR-linacs

Physics in Medicine & Biology, 2018
Previously, readings of air-filled ionization chambers have been described as being influenced by magnetic fields. To use these chambers for dosimetry in magnetic resonance guided radiotherapy (MRgRT), this effect must be taken into account by introducing a correction factor k B.
Stefan, Pojtinger, Oliver Steffen, Dohm, Ralf-Peter, Kapsch, Daniela, Thorwarth   +3 more
openaire   +2 more sources

MRI commissioning of 1.5T MR-linac systems – a multi-institutional study [PDF]

, 2019
Background: Magnetic Resonance linear accelerator (MR-linac) systems represent a new type of technology that allows for online MR-guidance for high precision radiotherapy (RT).
Paulson, Eric S., Dubec, Michael, Wetscherek, A, Chugh, B, Paulson, ES, van der Heide, Uulke A., van der Heide, UA, Dubec, M, Chugh, Brige, Tijssen, RHN, Wang, Jihong, Wetscherek, Andreas, Wang, J, Philippens, Marielle E.P., Tijssen, Rob H.N., Glitzner, Markus, Glitzner, M, Philippens, MEP   +17 more
core   +2 more sources

Dosimetric comparison of MR-linac-based IMRT and conventional VMAT treatment plans for prostate cancer

Radiation Oncology, 2021
Background The aim of this study was to evaluate and compare the performance of intensity modulated radiation therapy (IMRT) plans, planned for low-field strength magnetic resonance (MR) guided linear accelerator (linac) delivery (labelled IMRT MRL plans)
Vanessa Da Silva Mendes, Lukas Nierer, Minglun Li, Stefanie Corradini, Michael Reiner, Florian Kamp, Maximilian Niyazi, Christopher Kurz, Guillaume Landry, Claus Belka   +9 more
doaj   +1 more source

Investigations on particle dynamics in a high intensity heavy ion linac for inertial fusion [PDF]

, 2005
Die Physik intensiver Ionenstrahlen wird zur Zeit für verschiedene neue Hochstrom- und Hochenergie-Beschleunigeranlagen untersucht. Ein kritischer Punkt ist dabei die Minimierung der Strahlverluste, um die Aktivierung der Beschleunigerstruktur zu ...
Parisi, Giovanni
core  

Development and evaluation of a water‐profile‐based calibration method for 2D ionization chamber arrays in medical linear accelerator quality assurance

Journal of Applied Clinical Medical Physics, Volume 27, Issue 10, October 2026.
Abstract Purpose To develop and evaluate a water‐profile‐based (WP) calibration method for two‐dimensional (2D) ionization chamber arrays used in medical linear accelerator (linac) quality assurance (QA), and to compare its accuracy, efficiency, and cross‐energy applicability with the manufacturer‐provided wide‐field (WF) calibration method.
Kihong Pak, Sung‐woo Kim, Byungchul Cho, Jungwon Kwak, Seonghoon Jeong, Kyeongyun Park, Jisoo Kim, Jonghan Park, Si Yeol Song, Seonyeong Noh, Jongin Oh, Seokjin Kang, Chiyoung Jeong   +12 more
wiley   +1 more source

3D star shot analysis using MAGAT gel dosimeter for integrated imaging and radiation isocenter verification of MR‐Linac system

, 2022
PURPOSE: This study aims to investigate a star shot analysis using a three‐dimensional (3D) gel dosimeter for the imaging and radiation isocenter verification of a magnetic resonance linear accelerator (MR‐Linac).
Park, Jong Min, Jung‐in Kim, Hwang, Ui‐Jung, Jung, Seongmoon, Ui‐Jung Hwang, Shin, Wook‐Geun, Seongmoon Jung, Chang Heon Choi, Bitbyeol Kim, Hwang, Ui-Jung, Kim, Jung-in, Jeong Ho Kim, Jaeman Son, Shin, Wook-Geun, Wook‐Geun Shin, Jong Min Park, Kim, Bitbyeol, Kim, Jeong Ho, Choi, Chang Heon, Kim, Jung‐in, Son, Jaeman   +20 more
core   +1 more source