Intrafraction motion and impact of margin reduction for MR‐Linac ...

Magnetic Resonance Imaging–Guided vs Computed Tomography ...

Question Does the aggressive margin reduction allowed by magnetic resonance imaging (MRI) ... First, MRI-guided LINACs can monitor prostate motion ...

Intra-fractional geometric and dose/volume metric variations ... - phiRO

Based on post-treatment MRI, 5 fractions had CTV coverage lower than the acceptable constraint V95% <93 % due to the intrafraction motion. CTV ...

Impact of intrafraction changes in delivered dose of the day ... - tipsRo

Intrafraction motion observed during prostate SBRT treatment on the MR-Linac have dosimetric impacts on both the target and organs at risk. Post ...

Intrafraction motion tracking for MR-Linac prostate radiotherapy ...

... MR-Linac ... intrafraction motion, margin reduction below 4 mm require fast intrafraction plan adaptation methods. ... reduce the effect of intrafraction motion. In ...

Image-guided radiotherapy for prostate cancer - Dang

... the effect of intrafraction motion becomes more important. ... margins and electromagnetic tracking: assessing the impact of margin reduction study.

MR-LINAC, a New Partner in Radiation Oncology: Current Landscape

This technique allows for reduced uncertainties during treatment delivery due to the movement of critical structures and the tumor. Not only because of ...

Elekta Unity for Magnetic Resonance Radiation Therapy (MR/RT)

Evaluation of internal lung motion for respiratory-gated radiotherapy using MRI: Part II-margin reduction of ... MR-linac—quantifying the impact of the magnetic ...

Dosimetric effects of adaptive prostate cancer radiotherapy in an MR ...

However, there is a need for speed in the current MR-linac workflow to be able to shrink the conventional prostate cancer treatment margin. We ...

Empirical planning target volume modeling for high precision MRI ...

A PTV model parameterized by volumetric CTVfx coverage, proportion of fractions, and proportion of patients was developed. Intrafraction motion ...

Dosimetric effects of adaptive prostate cancer radiotherapy in an MR ...

... margin reduction. Keywords: Motion induced dose effects, MR-linac, Prostate radiotherapy, Intrafractional motion ... impact of anatomical changes for MR ...

MR-guided radiotherapy: where are we now and what does the ...

To minimize intrafraction motion, a necessity for such small margins, the Utrecht team developed a regime in which a new plan is created halfway ...

Dosimetric impact of prostate intrafraction motion during ...

errors, to control intrafraction motion, and to reduce CTV-to-PTV margins, even ... to integrate MRI with LINAC systems to facilitate adaptive treatments and ...

Assessment of intrafractional prostate motion and its dosimetric ...

The full non-gated motion extracted from the entire cine MRI was used to reconstruct the dose for a non-gated delivery, while the beam-on motion ...

Physics and Imaging in Radiation Oncology - Radboud Repository

Background and purpose: Strategies to limit the impact of intra-fraction motion during treatment are common in radiotherapy. Margin recipes ...

Radiotherapy and Oncology - DSpace

Background: Intrafraction motion during radiotherapy limits margin reduction and dose escalation. Magnetic resonance (MR)-guided linear ...

Simulating an intra-fraction adaptive workflow to enable PTV margin ...

PurposeThis study simulates a novel prostate SBRT intra-fraction re-optimization workflow in MRIgART to account for prostate intra-fraction motion and ...

Assessing the impact of intrafraction motion correction on PTV ...

PTV margins were determined using the van Herk formalism for each scenario and maximum and average deviations were assessed. The clinical ...

Real-time intrafraction motion monitoring in external beam ...

Besides photon RT, particle therapy is increasingly used to treat moving targets. However, transferring motion monitoring technologies from linacs to particle ...

Improved Ipsilateral Breast and Chest Wall Sparing With MR-Guided ...

An MRI that was acquired before each treatment was used for localization. When intrafractional motion of the lumpectomy cavity was evaluated, the mean margin ...

MRI-guided Radiation Therapy: An Emerging Paradigm in Adaptive ...

One of the main promises of the MRI-linac is to enable real-time intrafraction adaptive RT of tumors affected by motion without the need for ...