Implementation of Beam Matching Concept for the New Installed Elekta Precise Treatment System Medical LINACs in Indonesia

Firmansyah, Okky Agassy; Firmansyah, Assef Firnando; Sunaryati, Sri Inang; Putri, Monica; Setiadi, A. R.; Akbar, O. A.; Arif, V.; Amelia, C.

doi:10.17146/aij.2021.1041

Cited by 5 publications

(4 citation statements)

References 13 publications

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“…4 Elekta has recently provided Accelerated Go Live (AGL) service. 5 The AGL aims to directly match the measured beam data to the beam model in Monaco TPS (Elekta, Stockholm, Sweden). This beam model is provided by the vendor and the gamma analysis with a 2% dose difference (DD) and a 2-mm distance to agreement (DTA) is employed to evaluate the agreement between the calculation and the measurement during the AGL workflow.…”

Section: Introductionmentioning

confidence: 99%

“…Elekta has recently provided Accelerated Go Live (AGL) service 5 . The AGL aims to directly match the measured beam data to the beam model in Monaco TPS (Elekta, Stockholm, Sweden).…”

Section: Introductionmentioning

confidence: 99%

“…This beam model is provided by the vendor and the gamma analysis with a 2% dose difference (DD) and a 2‐mm distance to agreement (DTA) is employed to evaluate the agreement between the calculation and the measurement during the AGL workflow. By using the AGL service, it was reported that the beam commissioning processes among multiple Elekta Precise linacs can be significantly accelerated, thus enabling faster clinical use 5 . However, dosimetric accuracy and variations of volumetric modulated arc therapy (VMAT) deliveries among multiple AGL‐matched Elekta linacs are still unknown.…”

Section: Introductionmentioning

confidence: 99%

“…By using the AGL service, it was reported that the beam commissioning processes among multiple Elekta Precise linacs can be significantly accelerated, thus enabling faster clinical use. 5 However, dosimetric accuracy and variations of volumetric modulated arc therapy (VMAT) deliveries among multiple AGL‐matched Elekta linacs are still unknown.…”

Section: Introductionmentioning

confidence: 99%

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Delivery accuracy of VMAT on two beam‐matched linacs provided by accelerated go live service

Tsuneda

Abe

Fujita

et al. 2023

J Applied Clin Med Phys

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Introduction Dosimetric accuracy is critical when a patient treated with volumetric modulated arc therapy (VMAT) is transferred to another beam‐matched linac. To evaluate the performance of Accelerated Go Live (AGL) service, the measured beam characteristics and patient specific quality assurance (QA) results between two AGL‐matched linacs were compared. Materials and Methods Two VersaHD linacs were installed using the AGL service. After the installation, the beam data such as percentage depth dose (PDD), lateral profiles and output factors for all photon beams were measured. Relative doses were also measured as a function of the multi‐leaf collimator (MLC) leaf gap width. Subsequently, VMAT plans were created for prostate, pelvis, head and neck, liver, lung cancers and multiple brain metastases. Dose distributions and point doses were measured by multi‐dimensional detectors and ionization chambers for patient specific quality assurance, and comparisons were made between the two linacs. Results Dose differences in PDDs were all within ± 1% except the entrance region, and the averaged gamma indices of the lateral profiles were within 0.3. The differences in doses as a function of the MLC leaf gap width between the two linacs were within ±0.5%. For all the plans, gamma passing rates were all higher than 95% with criteria of 2%/2 mm. The average and the SD of dose differences on the multi‐dimensional detector between both measurements was 0.06 ± 2.12%, and the average of point dose differences was −0.03 ± 0.33%. Conclusion We have evaluated the AGL performance in the context of beam characteristics and patient specific QA. It was demonstrated that the AGL service provides an accurate VMAT treatment reproducibility for many tumor sites with gamma pass rates greater than 95% under criteria of 2%/2 mm.

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Section: Introductionmentioning

confidence: 99%

“…Elekta has recently provided Accelerated Go Live (AGL) service 5 . The AGL aims to directly match the measured beam data to the beam model in Monaco TPS (Elekta, Stockholm, Sweden).…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Delivery accuracy of VMAT on two beam‐matched linacs provided by accelerated go live service

Tsuneda

Abe

Fujita

et al. 2023

J Applied Clin Med Phys

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3D gamma analysis between treatment plans for nominally beam‐matched medical linear accelerators using PyMedPhys

Guan,

Donahue,

Biggs

et al. 2024

Precision Radiation Oncology

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Beam‐matched linear accelerators (linacs) enable flexible patient scheduling and efficient treatment delivery in the event of unexpected machine downtime. The purpose of this study was to test the feasibility of 3D gamma index as an additional metric beyond standard measurement‐based comparisons for more efficient evaluation of treatment plans between linacs with nominally matched beam models to ensure safe patient transfer. Seventeen 3D conformal radiotherapy (3DCRT) plans and thirty‐six volumetric‐modulated radiation therapy (VMAT) plans for different disease sites were selected from the original linac. An in‐house script was used to automatically create new plans for the target linac and calculate dose using parameters of the original plans. 3D gamma analysis was performed to compare plan dose distributions between the target and original linacs using PyMedPhys. The 2%/2 mm gamma pass (γ≤1) rate was >99.99% for all 3DCRT plans. The median 1%/1 mm pass rate was 99.86% but two cases failed (< 90%). For VMAT plans, the median and minimum 2%/2 mm gamma pass rates were 99.43% and 93.81%. For 1%/1 mm, the median pass rate was 92.02% but ten cases failed. The results indicated using 3D gamma index can enhance the confidence and add an extra layer for safe patient transfer.

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Evaluation of patient-specific quality assurance for fractionated stereotactic treatment plans with 6 and 10MV photon beams in beam-matched linacs

Kannan,

Saminathan,

Chandraraj

et al. 2024

Radiol Phys Technol

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Implementation of Beam Matching Concept for the New Installed Elekta Precise Treatment System Medical LINACs in Indonesia

Cited by 5 publications

References 13 publications

Delivery accuracy of VMAT on two beam‐matched linacs provided by accelerated go live service

Delivery accuracy of VMAT on two beam‐matched linacs provided by accelerated go live service

3D gamma analysis between treatment plans for nominally beam‐matched medical linear accelerators using PyMedPhys

Evaluation of patient-specific quality assurance for fractionated stereotactic treatment plans with 6 and 10MV photon beams in beam-matched linacs

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