Browse > Article

Feasibility study of using Halcyon LINAC for Double-target spine stereotactic body radiation therapy  

Jeong Hee Ju (Department of Radiation Oncology, Samsung Medical Center)
An Ye Chan (Department of Radiation Oncology, Samsung Medical Center)
Park Byung Suk (Department of Radiation Oncology, Samsung Medical Center)
Park Myung Hwan (Department of Radiation Oncology, Samsung Medical Center)
Park Yong Chul (Department of Radiation Oncology, Samsung Medical Center)
Publication Information
The Journal of Korean Society for Radiation Therapy / v.34, no., 2022 , pp. 51-60 More about this Journal
Abstract
Objectives: The purpose is to evaluate dosimetric performance and delivery efficiency of VMAT with Halcyon LINAC for double target spine SBRT Materials and Methods: 12 patients with spine oligometastases were retrospectively studied. Single-isocenter spine SBRT plans was established using Halcyon® with Dual Layer MLC and Truebeam® with High Definition MLC. All patients' plans were created in Eclipse TPS through the identical conditions and optimization. C.I, H.I, G.I (Gradient Index), maximal and volumetric doses to spinal cord and low dose area were evaluated for comparison of both plans. Also, total MU and BOT(Beam On Time) were evaluated. Results: Halcyon plans was no Statistical differences in C.I and H.I. However, the average of G.I was 4.64 for Halcyon, which decreased to 5.5% compared to Truebeam (P<0.001). Halcyon plans demonstrated statistically significant reduced G.I. The average of 50% and 25% isodose volume was 487.56 cc (-3.82%, P<0.001), 1859.45 cc (-4.75%, P<0.001) in Halcyon, respectively. Significantly reduced low dose spill were observed in Halcyon plans. In the evaluation of the spinal cord, the average of Dmean and V10 of Halcyon plans in the sample group with an overlap volume of less than 1 cc was 6.802 Gy (-3.504%, P=0.067), 5.766±1.683 cc (-8.199%, P=0.002), respectively. Halcyon plans demonstrated statistically significant reduced Dmean and V10. For delivery efficiency, MU and BOT(maximum dose rate for each machine), on average, increased in Halcyon plans. However, the average of BOT(800MU/min for each machine) was 648.33 sec for Halcyon (-1.74%, P<0.001). Conclusion: Halcyon plan for double-target spine SBRT demonstrated advantages in the low dose area with a steep dose gradient, while having dosimetrically equivalent target dose distribution and spinal cord protective effect. As a result, Halcyon LINAC produced a dosimetrically improved plan for double-target spine SBRT.
Keywords
Spine SBRT; SIMT-VMAT; Halcyon; Dual layer MLC; Truebeam; High definition MLC;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Samuel R, Hannah Yoon, Alexander S et al. Contemporary treatment with radiosurgery for spine metastasis and spinal cord compression in 2015. Radiation oncology journal, 2015, 33.1: 1 
2 Hiroaki O, Kei I, Takuya S et al. Re-irradiation for painful bone metastases using stereotactic body radiotherapy. Acta Oncologica, 2018, 57.12: 1700-1704    DOI
3 Sten M, Arjun S, Motohiro H et al. Reirradiation spine stereotactic body radiation therapy for spinal metastases: systematic review: International Stereotactic Radiosurgery Society practice guidelines. Journal of Neurosurgery: Spine, 2017, 27.4: 428-435    DOI
4 Antonio P, Luciana C, Fabiana B et al. Cumulative dose, toxicity, and outcomes of spinal metastases re-irradiation. Strahlentherapie und Onkologie, 2021, 197.5: 369-384    DOI
5 Joe HC, Franzcr AS, Renee K et al. Positional accuracy of treating multiple versus single vertebral metastases with stereotactic body radiotherapy. Technology in Cancer Research & Treatment, 2017, 16.2: 231-237    DOI
6 Orit G, Annette EK, Rojano K et al. Influence of rotations on dose distributions in spinal stereotactic body radiotherapy (SBRT). International Journal of Radiation Oncology* Biology* Physics, 2009, 73.5: 1596-1601    DOI
7 Peter CG, Ehud M, yoshiya Y. Radiotherapy and radiosurgery for metastatic spine disease: what are the options, indications, and outcomes?. Spine, 2009, 34.22S: S78-S92    DOI
8 Arjun S, David AL, Eric LC. Stereotactic body radiosurgery for spinal metastases: a critical review. International journal of radiation oncology, biology, physics, 2008, 71.3: 652-665    DOI
9 Stanley HB, Kamil MY, David F et al. Stereotactic body radiation therapy: the report of AAPM Task Group 101. Medical physics, 2010, 37.8: 4078-4101    DOI
10 Damodar P, Tanner T, Joseph S et al. Prostate SBRT using O-Ring Halcyon LINAC-Plan quality, delivery efficiency, and accuracy. Journal of Applied Clinical Medical Physics, 2021, 22.1: 68-75    DOI
11 Taoran L, Peyton I, Haisong L et al. Dosimetric performance and planning/delivery efficiency of a dual-layer stacked and staggered MLC on treating multiple small targets: A planning study based on single-isocenter multi-target stereotactic radiosurgery (SRS) to brain metastases. Frontiers in Oncology, 2019, 7 
12 Fang L, Jeonghoon P, Ron L et al. Is Halcyon feasible for single thoracic or lumbar vertebral segment SBRT?. Journal of Applied Clinical Medical Physics, 2022, 23.1: e13458