Results 181 to 190 of about 649,932 (223)
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2023
MR-linacs have been implemented in the past with the capability to perform online adaptive radiotherapy. Because of the hybrid nature of an MR-linac, an adaptation of previous quality assurance (QA) procedures for conventional linacs is required in combination with new procedures for the imaging component.
Palacios, Miguel A., Brink, Carsten
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MR-linacs have been implemented in the past with the capability to perform online adaptive radiotherapy. Because of the hybrid nature of an MR-linac, an adaptation of previous quality assurance (QA) procedures for conventional linacs is required in combination with new procedures for the imaging component.
Palacios, Miguel A., Brink, Carsten
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Considerations for MR-linac bunker shielding design
Biomedical Physics & Engineering Express, 2023Abstract Purpose. To show the considerations followed for MR-linac in shielding design for the first MR-linac in Mexico following the national clinical necessities. Method. The National Council on Radiation Protection and Measurements (NCRP) 151 recommendations were followed for the shielding design for primary and ...
María del Sol Quintero Castelán +3 more
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Small‐field output factor dependence on the field size definition in MR‐Linac
Medical Physics (Lancaster)Radiation beam characteristics are primarily evaluated based on field size. However, in small fields, especially with magnetic fields used in new technology (MR‐Linac), the field size definition is altered. Typically, field size is defined by two methods:
Indra J. Das, A. Khan, Poonam Yadav
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Medical Physics (Lancaster), 2023
BACKGROUND Real-time motion monitoring (RTMM) is necessary for accurate motion management of intrafraction motions during radiation therapy (RT). PURPOSE Building upon a previous study, this work develops and tests an improved RTMM technique based on ...
H. Jassar +11 more
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BACKGROUND Real-time motion monitoring (RTMM) is necessary for accurate motion management of intrafraction motions during radiation therapy (RT). PURPOSE Building upon a previous study, this work develops and tests an improved RTMM technique based on ...
H. Jassar +11 more
semanticscholar +1 more source
Towards adaptive IMRT sequencing for the MR-linac
Physics in Medicine and Biology, 2015The MRI linear accelerator (MR-linac) that is currently being installed in the University Medical Center Utrecht (Utrecht, The Netherlands), will be able to track the patient's target(s) and Organ(s) At Risk during radiation delivery. In this paper, we present a treatment planning system for intensity-modulated radiotherapy (IMRT).
Kontaxis, C +3 more
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Radiotherapy and Oncology
BACKGROUND AND PURPOSE Radiation-induced pneumonitis (RP), diagnosed 6-12 weeks after treatment, is a complication of lung tumor radiotherapy. So far, clinical and dosimetric parameters have not been reliable in predicting RP.
R. Klaar +10 more
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BACKGROUND AND PURPOSE Radiation-induced pneumonitis (RP), diagnosed 6-12 weeks after treatment, is a complication of lung tumor radiotherapy. So far, clinical and dosimetric parameters have not been reliable in predicting RP.
R. Klaar +10 more
semanticscholar +1 more source
Medical Physics, 2015
The use of MRI in radiation therapy is rapidly increasing. Applications vary from the MRI simulator, to the MRI fused with CT, and to the integrated MRI+RT system. Compared with the standard MRI QA, a broader scope of QA features has to be defined in order to maximize the benefits of using MRI in radiation therapy.
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The use of MRI in radiation therapy is rapidly increasing. Applications vary from the MRI simulator, to the MRI fused with CT, and to the integrated MRI+RT system. Compared with the standard MRI QA, a broader scope of QA features has to be defined in order to maximize the benefits of using MRI in radiation therapy.
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MRI-LINEAR ACCELERATOR (MR-LINAC)
The intersection of magnetic resonance (MR) imaging and linear accelerators within hybrid treatment systems has ushered in a new era of clinical possibilities for MR-guided radiation therapy. This comprehensive study delves into the intricate technical blueprint of a sophisticated 0.35 T MR-Linac, illuminating its nuanced clinical applications ...Mr. Mayank Pal Singh +4 more
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British Journal of Radiology
OBJECTIVES Metallic implants cause artefacts and distortion on MRI. To ensure accurate dose delivery and plan adaptation on an MR Linac, there is a need to evaluate distortion caused.
L. McDaid +9 more
semanticscholar +1 more source
OBJECTIVES Metallic implants cause artefacts and distortion on MRI. To ensure accurate dose delivery and plan adaptation on an MR Linac, there is a need to evaluate distortion caused.
L. McDaid +9 more
semanticscholar +1 more source
Beam modeling and validation for a 1.5 T MR-linac in an alternative treatment planning system
Physics in Medicine and BiologyObjective. MR-guided adaptive radiotherapy (MRgART) is ideally suited to adjust the treatment plan for anatomical changes. The online nature of MRgART involves multiple process steps during each treatment fraction, which may greatly benefit from ...
R.G.J. Kierkels +4 more
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