Comparison of dosimetry parameters of three-dimensional conformational radiation therapy and volumetric modulated arc therapy on the example of treatment of a patient with salivary gland adenocarcinoma

2021 ◽  
Vol 59 (1) ◽  
pp. 25-30
Author(s):  
A. Rakhimov ◽  
M. Zekebayev ◽  
A. Kuatbek ◽  
V. Dyachkov
Keyword(s):  
Radiation Therapy ◽  
Salivary Gland ◽  
Volumetric Modulated Arc Therapy ◽  
Three Dimensional ◽  
Optimal Choice ◽  
International Standards ◽  
Salivary Gland Cancer ◽  
Conformal Radiation Therapy ◽  
Dose Load ◽  
Arc Therapy

An optimal choice of radiation therapy method is the main prerequisite for successful completion of treatment. Continuous analysis of radiation therapy methods’ advantages and comparing their parameters and dose load in typical cases will increase the treatment efficacy and reduce the unavoidable load on critical organs. The purpose was to check the plans of treatment by volumetric modulated arc therapy (VMAT) and three-dimensional conformal radiation therapy (3D-CRT) methods, make their comparison and identify the advantages using an example of a treatment design for a patient treated at the Daily Radiotherapy Hospital of the Kazakh Institute of Oncology and Radiology (Almaty, Kazakhstan). Results: The presented illustrations of the process planning and the numerical analysis of the dose load on critical organs show VMAT advantages for radiation therapy of salivary gland cancer: optimal coverage, sparing load on critical organs and healthy tissues, gradient decay at the borders of the neoplasm. Conclusion: The variability of radiation therapy methods ensures the most acceptable coverage that keeps the dose load within international standards’ ranges. Mastering these methods will improve the effectiveness of radiation therapy for various cancer cases

scholarly journals Comparison of dosimetry parameters of three-dimensional conformational radiation therapy and volumetric modulated arc therapy on the example of treatment of a patient with salivary gland adenocarcinoma

2021 ◽  
Vol 59 (1) ◽  
pp. 25-30
Author(s):  
Adil Rakhimov ◽  
Miras Zekebayev ◽  
Aray Kuatbek ◽  
Vyacheslav Dyachkov
Keyword(s):  
Radiation Therapy ◽  
Salivary Gland ◽  
Volumetric Modulated Arc Therapy ◽  
Three Dimensional ◽  
Optimal Choice ◽  
International Standards ◽  
Salivary Gland Cancer ◽  
Conformal Radiation Therapy ◽  
Dose Load ◽  
Arc Therapy

Relevance: An optimal choice of radiation therapy method is the main prerequisite for successful completion of treatment. Continuous analysis of radiation therapy methods’ advantages and comparing their parameters and dose load in typical cases will serve to increase the treatment efficacy and reduce the unavoidable load on critical organs. Purpose: To check the plans of treatment by volumetric modulated arc therapy (VMAT) and three-dimensional conformal radiation therapy (3D-CRT) methods, make their comparison, and identify the advantages using an example of a treatment design for a patient treated at the Daily Radiotherapy Hospital of the Kazakh Institute of Oncology and Radiology (Almaty, Kazakhstan). Results: The presented illustrations of the process planning and the numerical analysis of the dose load on critical organs show VMAT advantages for radiation therapy of salivary gland cancer: optimal coverage, sparing load on critical organs and healthy tissues, gradient decay at the borders of the neoplasm. Conclusion: The variability of radiation therapy methods ensures the most acceptable coverage that keeps the dose load within international standards’ ranges. Mastering these methods will improve the effectiveness of radiation therapy for various cancer cases.

Patterns of radiation therapy technology use in the treatment of bone metastases.

2016 ◽  
Vol 34 (26_suppl) ◽  
pp. 211-211
Author(s):  
Matthew Chan ◽  
Robert Anton Olson ◽  
Shilo Lefresne ◽  
Michael R. McKenzie
Keyword(s):  
British Columbia ◽  
Radiation Therapy ◽  
Bone Metastases ◽  
Technology Use ◽  
Volumetric Modulated Arc Therapy ◽  
Three Dimensional ◽  
Conformal Radiation Therapy ◽  
Lung Cancers ◽  
Significant Difference ◽  
3D Crt

211 Background: In recent years, there has been a transition from two-dimensional radiation therapy (2DRT) planning towards more advanced techniques such as three-dimensional conformal radiation therapy (3D-CRT), volumetric modulated arc therapy (VMAT), and stereotactic body radiation therapy (SBRT). Our study aim was to analyze these trends in the treatment of bone metastases. Methods: All patients aged 18 and older who had received palliative intent RT for bone metastases between 2009-2014 and referred to any 1 of 6 regional cancer centers in British Columbia, Canada were reviewed. Summary statistics were used to describe radiation technique patterns. Logistic regression modeling was used to assess the influence of demographic, clinical, and health services variables on receipt of types of RT. Results: We identified 8,059 patients and 15,832 courses of RT; overall, 97.9% of courses were achieved by 2DRT and 2.1% by 3D-CRT, VMAT, or SBRT. Despite the low overall use of advanced techniques, its use was significantly higher in all subsequent years compared to 2009 (p < 0.05 for all years). The median age for patients treated with 2DRT was 67.0 (19-99) versus 66.0 years (19-93) for advanced techniques. There did not appear to be a statistically significant difference in age at the time of treatment start (OR 0.99; 95% CI 0.981-1.00, p < 0.05). Compared to lung cancers, thyroid (OR 9.9; 95% CI 5.197-18.724, p < 0.001) and kidney cancers (OR 3.9; 95% CI 2.508-5.911, p < 0.001) were significantly more likely to be treated with advanced techniques, while breast (OR 0.90; 95% CI 0.621-1.306, p = 0.58) and prostate cancers (OR 0.93; 95% CI 0.613-1.410, p = 0.73) were not any more likely. Compared to the Vancouver center, all other treatment centers in the province were utilizing advanced techniques less frequently. Patients were also more likely to complete RT with 2DRT than with advanced techniques (98.3% versus 95.8%, p < 0.05). Conclusions: The vast majority of treatment of bone metastases is still done by 2DRT in British Columbia. Despite these overall statistics though, a trend towards increasing use of more advanced techniques was observed.

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