Verification of patient specific quality assurance system for volumetric modulated arc therapy (VMAT)

Amoabeng, Kwame Anokye; Marthinsen, Anne Beate Langeland; Hasford, Francis; Tagoe, Samuel Nii Adu; Anaafi, Evelyn

doi:10.1007/s12553-022-00675-6

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…This plan orchestrates continuous adjustments to the spatial distribution of the multi-leaf collimator (MLC), dose rate, and gantry rotational speed, ensuring delivery of the optimized dose. To ensure such precision, the dose calculated by the TPS should be consistent with the dose applied to the patient [1][2][3][4]. To achieve this outcome, a dosimeter with high spatial resolution based on high sensitivity per unit volume is required [5].…”

Section: Introductionmentioning

confidence: 99%

Feasibility assessment of polycrystalline CsPbI₃ relative dosimeters in photon and electron beam radiotherapy

Yang,

Park,

Kim

2024

J. Inst.

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Volumetric modulated arc therapy represents the latest technology in radiotherapy. It involves continuous modification of the multi-leaf collimator spatial distribution, dose rate, and gantry rotational speed, necessitating a dosimeter with high spatial resolution and exceptional sensitivity per unit volume. In particular, cesium-based inorganic perovskites have been studied for various applications, spanning from photoconductor solar cells to radiation detectors. These perovskites are renowned for their outstanding attributes, including thermal stability, inorganic stability, and light absorption capacity. Despite such advantageous characteristics, CsPbI3 materials have only been investigated in radiodiagnostics, with limited exploration in radiotherapy. To address this gap, this study verified the viability of CsPbI3 materials, note for their outstanding radiation detection efficiency, as dosimeters capable of measuring the radiation detection performance for radiotherapy devices. The reproducibility, linearity, and percent depth dose (PDD) were evaluated under the application of photon and electron beams in linear accelerators. The reproducibility assessment revealed impressive results, with the relative standard deviation registering at 0.53%, 0.32%, and 0.38% under electron beam energies of 6, 9, and 12 MeV and 0.45%, and 0.89% under photon beam energies of 6 and 15 MV. Moreover, the linearity test revealed an R 2 value of 0.9999, indicating high linearity, at 6, 9, and 12 MeV and at 6 and 15 MV. The PDD graphs drawn for the CsPbI3 dosimeter fabricated in this study showed that the D max points were consistent. The novel CsPbI3 dosimeter demonstrated a level of detection performance that satisfied all criteria; reproducibility, linearity, and PDD. The results collectively indicated that the CsPbI3 dosimeter can be used for dosimeters in radiotherapy devices.

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Section: Introductionmentioning

confidence: 99%

Feasibility assessment of polycrystalline CsPbI₃ relative dosimeters in photon and electron beam radiotherapy

Yang,

Park,

Kim

2024

J. Inst.

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The State of Clinical Medical Physics and Education in Ghana

Yorke

Quaye

Hasford

et al. 2023

International Journal of Radiation Oncology*Biology*Physics

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Delta4-based Dosimetric Error Detection in Volumetric-modulated Arc Therapy: Clinical Significance and Implications

Udee,

Commukchik,

Khamfongkhruea

et al. 2024

Journal of Medical Physics

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Background: Volumetric-modulated arc therapy (VMAT) is an efficient method of administering intensity-modulated radiotherapy beams. The Delta4 device was employed to examine patient data. Aims and Objectives: The utility of the Delta4 device in identifying errors for patient-specific quality assurance of VMAT plans was studied in this research. Materials and Methods: Intentional errors were purposely created in the collimator rotation, gantry rotation, multileaf collimator (MLC) position displacement, and increase in the number of monitor units (MU). Results: The results show that when the characteristics of the treatment plans were changed, the gamma passing rate (GPR) decreased. The largest percentage of erroneous detection was seen in the increasing number of MU, with a GPR ranging from 41 to 92. Gamma analysis was used to compare the dose distributions of the original and intentional error designs using the 2%/2 mm criteria. The percentage of dose errors (DEs) in the dose-volume histogram (DVH) was also analyzed, and the statistical association was assessed using logistic regression. A modest association (Pearson’s R-values: 0.12–0.67) was seen between the DE and GPR in all intentional plans. The findings indicated a moderate association between DVH and GPR. The data reveal that Delta4 is effective in detecting mistakes in treatment regimens for head-and-neck cancer as well as lung cancer. Conclusion: The study results also imply that Delta4 can detect errors in VMAT plans, depending on the details of the defects and the treatment plans employed.

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Verification of patient specific quality assurance system for volumetric modulated arc therapy (VMAT)

Cited by 3 publications

References 19 publications

Feasibility assessment of polycrystalline CsPbI₃ relative dosimeters in photon and electron beam radiotherapy

Feasibility assessment of polycrystalline CsPbI₃ relative dosimeters in photon and electron beam radiotherapy

The State of Clinical Medical Physics and Education in Ghana

Delta4-based Dosimetric Error Detection in Volumetric-modulated Arc Therapy: Clinical Significance and Implications

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Verification of patient specific quality assurance system for volumetric modulated arc therapy (VMAT)

Cited by 3 publications

References 19 publications

Feasibility assessment of polycrystalline CsPbI3 relative dosimeters in photon and electron beam radiotherapy

Feasibility assessment of polycrystalline CsPbI3 relative dosimeters in photon and electron beam radiotherapy

The State of Clinical Medical Physics and Education in Ghana

Delta4-based Dosimetric Error Detection in Volumetric-modulated Arc Therapy: Clinical Significance and Implications

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Product

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Feasibility assessment of polycrystalline CsPbI₃ relative dosimeters in photon and electron beam radiotherapy

Feasibility assessment of polycrystalline CsPbI₃ relative dosimeters in photon and electron beam radiotherapy