Skip to main content Accessibility help
×
Home

A dosimetric retrospective planning study comparing volumetric arc therapy (VMAT) and stereotactic body radiotherapy (SBRT) treatment plans for non-small cell lung cancer (NSCLC)

  • Maungwe Peter (a1) and Chamunyonga Crispen (a2)

Abstract

Purpose

A retrospective planning study comparing volumetric arc therapy (VMAT) and stereotactic body radiotherapy (SBRT) treatment plans for non-small cell lung cancer (NSCLC).

Methods and materials

Five randomly selected early stage lung cancer patients were included in the study. For each patient, four plans were created: the SBRT plan and three VMAT plans using different optimisation methodologies. A total of 20 different plans were evaluated. The dose parameters of dose conformity results and the target dose constraints results were compared for these plans.

Results

The mean planning target volume (PTV) for all the plans (SBRT and VMAT) was 18·3 cm3, with a range from 15·6 to 20·1 cm3. The maximum dose tolerance to 1 cc of all the plans was within 140% (84 Gy) of the prescribed dose, and 95% of the PTV of all the plans received 100% of the prescribed dose (60 Gy). In all the plans, 99% of the PTV received a dose >90% of the prescribed dose, and the mean dose in all the plans ranged from 67 to 72 Gy. The planning target dose conformity for the SBRT and the VMAT (0°, 15° collimator single arc plans and dual arc) plans showed the tightness of the prescription isodose conformity to the target.

Conclusions

SBRT and VMAT are radiotherapy approaches that increase doses to small tumour targets without increasing doses to the organs at risk. Although VMAT offers an alternative to SBRT for NSCLC and the potential advantage of VMAT is the reduced treatment times over SBRT, the statistical results show that there was no significant difference between the SBRT and VMAT optimised plans in terms of dose conformity and organ-at-risk sparing.

Copyright

Corresponding author

Correspondence to: Maungwe Peter, Christie Physics and Medical Engineering, The Christie NHS Foundation Trust, Wilmslow Road, Manchester, M20 4BX, UK. Tel: 0161 446 8181. E-mail: maungwe.peter@christie.nhs.uk

References

Hide All
1.Qiao, X, Tullgren, O, Lax, Iet al. The role of radiotherapy in treatment of stage I non-small cell lung cancer. Lung Cancer 2003; 41: 111.
2.Kunkler, I H, Audisio, R, Belkacemi, Yet al. Review of current best practice and priorities for research in radiation oncology for elderly patients with cancer: the International Society of Geriatric Oncology (SIOG) task force. Ann Oncol 2014; 10: 10871093.
3.Janssen-Heijnen, M, Smulders, S, Lemmens, Vet al. Effect of comorbidity on the treatment and prognosis of elderly patients with non-small cell lung cancer. Thorax 2004; 59 (7): 602607.
4.Brock, J, Bedford, J, Partridge, Met al. Optimising stereotactic body radiotherapy for non-small cell lung cancer with VMAT- a planning study. Clin Oncol 2012; 24 (1): 6875.
5.Palma, D, Vollans, E, James, Ket al. Volumetric modulated arc therapy for delivery of prostate radiotherapy: comparison with intensity-modulated radiotherapy and three-dimensional conformal radiotherapy. Int J Radiat Oncol Biol Phys 2008; 72: 9961001.
6.Coen, W H, Johan, P C, Frank, J Let al. Recommendations for implementing stereotactic radiotherapy in peripheral stage IA non-small cell lung cancer: report from the Quality Assurance Working Party of the randomised phase III ROSEL study. Radiat Oncol 2009; 4: 1.
7.Bedford, J L. Treatment planning for volumetric modulated arc therapy. Med Phys 2009; 36: 51285138.
8.Richmond, N, Green, J, Peedell, C, Shakespeare, D, Walker, C. Dosimetric evaluation of a conformal seven-field coplanar technique for planning lung stereotactic body radiotherapy. Clin Oncol (R Coll Radiol) 2012; 24 (1): 2430.
9.Bradley, J, Deasy, J O, Bentzen, S, El-Naqa, I. Dosimetric correlates for acute esophagitis in patients treated with radiotherapy for lung carcinoma. Int J Radiat Oncol Biol Phys 2004; 58 (4): 11061113.
10.Laed statistics. One way ANOVA, 2013. https://statistics.laerd.com/. Accessed on 20th June 2014.
11.Bertelsen, A, Hansen, O, Brink, C. Does VMAT for treatment of NSCLC patients increase the risk of pneumonitis compared to IMRT. Acta Oncol 2012; 51 (6): 752758.
12.Francis, K N, Purdie, T G, Dawson, L A. Incorporating heterogeneity correction and 4DCT in lung stereotactic body radiation therapy (SBRT), the effect on target coverage, organs at risk doses, and dose conformity. Med Dosim 2010; 35 (2): 101107.
13.Ping-Fang, T, Shih-Min, L, Shen-Hao, Let al. The feasibility study of using multiple partial volumetric-modulated arcs therapy in early stage left-sided breast cancer patients. J Appl Clin Med Phys 2012; 13: 5.
14.Matuszak, M M, Yan, D, Grills, I, Martinez, A. Clinical applications of volumetric modulated arc therapy. Int J Radiat Oncol Biol Phys 2010; 77 (2): 608616.

Keywords

A dosimetric retrospective planning study comparing volumetric arc therapy (VMAT) and stereotactic body radiotherapy (SBRT) treatment plans for non-small cell lung cancer (NSCLC)

  • Maungwe Peter (a1) and Chamunyonga Crispen (a2)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed