Comparison between DCA - SSO - VDR and VMAT dose delivery techniques for 15 SRS/SRT patients

Tas, B.; Durmuş, İsmail

doi:10.1063/1.5026015

Cited by 1 publication

(2 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They compared the plan quality between DCA with single arc, DCA with five noncoplanar arc and VMAT and reported that VMAT is superior to DCA-single arc and DCA-5 arc. 2 5 7 This could be because of the inverse optimization of the VMAT plans that adjusts the dose to the target ( Figs. 4 and 5 ).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

The Optimal Choice of Technique for Stereotactic Radiosurgery—A LINAC-Based Dosimetric Study between DCA, DCA-SSO, DCA-SSO-VDR, and VMAT

Venugopal

Sowmya

Tiwari

et al. 2022

Asian Journal of Oncology

View full text Add to dashboard Cite

Introduction Advanced radiation therapy delivery techniques require greater understanding of various planning sequences and methods. The aim of this study is to determine a class solution that finds the best possible technique to deliver for stereotactic radiosurgery between dynamic conformal arc (DCA) techniques using various options such as DCA, DCA + SSO (segment shape optimization), and DCA + SSO + VDR (variable dose rate) using noncoplanar beam arrangement and volumetric modulated arc therapy (VMAT) using coplanar beams. Materials and Methods In this dosimetric study, 11 brain cases were retrospectively planned for various techniques and analyzed for the Paddick conformity index (CI), Radiation Therapy Oncology Group homogeneity index (HI), Paddick gradient index (GI), treatment time in terms of monitor units (MU) and normal brain dose (V12Gy). The paired t-test was performed to know the statistical significance between the techniques. Results In terms of CI, GI, and control of the normal brain dose, the VMAT plan was superior to other techniques. But, HI was found to be better with DCA. Above all, VMAT delivered higher MU than any other technique. The p-values between DCA + SSO and DCA, DCA + SSO + VDR and DCA + SSO, and VMAT and DCA + SSO + VDR are as follows: CI: 0.0004, 0.015, and 0.03; GI: 0.03, 0.33, and 0.29; HI: 0.008, 0.04, and 0.06; V12 Gy of normal brain: 0.1, 0.01, 0.38. VMAT requires approximately 41 ± 17% more MU than DCA + SSO + VDR. Conclusion VMAT using coplanar beams is preferable among all the techniques, considering the dosimetric parameters studied. If VMAT is not available in the facility, DCA + SSO + VDR technique using non coplanar beams can be used to deliver SRS treatment.

show abstract

Section: Discussionmentioning

confidence: 99%

“…There are various techniques by which SRS can be delivered such as dynamic conformal arc (DCA) and VMAT. 5 Both DCA and VMAT are rotational techniques. DCA is a forward planning technique where the user defines Gantry start and stop angle, collimator and couch angle.…”

Section: Introductionmentioning

confidence: 99%