Setup and intra-fractional motion measurements using surface scanning in head and neck cancer radiotherapy– A feasibility study

Essers, Marion; Mesch, Lennart; Beugeling, Maaike; Dekker, Janita; de Kruijf, Willy

doi:10.1016/j.phro.2024.100563

Physics and Imaging in Radiation Oncology

2024

DOI: 10.1016/j.phro.2024.100563

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Setup and intra-fractional motion measurements using surface scanning in head and neck cancer radiotherapy– A feasibility study

Marion Essers,

Lennart Mesch,

Maaike Beugeling

et al.

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2024

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Dosimetric Comparison between the HyperArc and Conventional VMAT in Cervical Spine Stereotactic Radiosurgery

Park,

Kim

2024

JCM

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Background: This research aims to evaluate the usability of the HyperArc (HA) technique in stereotactic radiosurgery for cervical spine metastasis by comparing the dosimetry of the target and organs at risk, specifically the spinal cord, between HA and VMAT and conventional volumetric modulated arc therapy (VMAT). Methods: A RANDO® phantom and QFix EncompassTM and support system were used to simulate three target types (A, B, and C) based on RTOG0631 guidelines. Treatment plans included one VMAT and two HyperArc techniques with different SRS NTO values (100 and 250). Dosimetric parameters such as conformity index (CI), homogeneity index (HI), R50, and spinal cord sparing were analyzed. Gamma analysis was performed using portal dosimetry to validate the dose delivery accuracy. Results: HyperArc plans demonstrated higher conformity, sharper dose fall-off, and improved quality assurance (QA) results compared to VMAT plans. HA with SRS NTO 250 showed even better results in terms of conformity, dose fall-off, and spinal cord dose reduction (V10 and Dmax) compared to HA with SRS NTO 100. Although the mean gamma passing rates were slightly lower, all plans achieved rates above 95%. Conclusion: The findings suggest that HA provides superior dosimetric benefits over VMAT and could be effectively utilized for cervical spine radiation therapy.

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Dosimetric Comparison between the HyperArc and Conventional VMAT in Cervical Spine Stereotactic Radiosurgery

Park,

Kim

2024

JCM

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Setup and intra-fractional motion measurements using surface scanning in head and neck cancer radiotherapy– A feasibility study

Cited by 1 publication

References 35 publications

Dosimetric Comparison between the HyperArc and Conventional VMAT in Cervical Spine Stereotactic Radiosurgery

Dosimetric Comparison between the HyperArc and Conventional VMAT in Cervical Spine Stereotactic Radiosurgery

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