Fabrication and development of a thorax phantom to evaluate 3D CRT treatment planning techniques for post-mastectomy chest wall radiotherapy

Lobo, Dilson; Srinivas, C. R.; Banerjee, Sourjya; Putha, Suman Kumar; Saxena, PU Prakash; Holla, Raghavendra; Shreyas, R; Ravichandran, R

doi:10.1007/s13246-021-00992-6

Cited by 1 publication

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The design and fabrication of thorax phantom is as mentioned by Lobo D et al (Lobo et al, 2021). This phantom was fabricated locally to confirm the delivered dose to the target (chest wall) as well as the surface dose to the scar region with 3DCRT plans for PMRT patients.…”

Section: Design and Fabrication Of Thorax Phantommentioning

confidence: 99%

Estimation of Surface Dose in the Presence of Unwanted Air Gaps under the Bolus in Postmastectomy Radiation Therapy: A Phantom Dosimetric Study

Lobo

Challapalli

Sourjya

et al. 2022

Asian Pac J Cancer Prev

Self Cite

View full text Add to dashboard Cite

Background:The aim of this study is to design and fabricate a thorax phantom with irregularly shaped trapezoidal slots across the left side of the chest wall, allowing for the creation of unwanted air gaps under the bolus. Method: Surface dose (D surf ) measurements were made with Gaf Chromic EBT3 films at air gaps (0.0, 5.0, 10.0 and 15.0 mm) under gel bolus of thickness (5.0 mm & 10.0 mm), for 3DCRT technique (2 and 3 field) with clinical 6 MV photon beam under uniform and non-uniform air gap condition. The obtained values were compared with TPS estimated ones. Results: In the presence of 15.0 mm uniform air gap, the mean estimated and measured D surf values with two and three field techniques decreased by 14.0 % to 15.2% and 14.7% to 17.4% under 5.0 mm and 10.0 mm bolus applications respectively. In presence of non-uniform air gap condition, the effect on D surf was minimal (3 to 3.5%) compared with the uniform air gap condition. Conclusions: Based on the study's findings, it is recommended that when using bolus in clinical radiotherapy applications, special care be taken to avoid unwanted air gaps under the bolus in order to achieve a uniform surface dose across the treatment region, where a customized 3D printed bolus may be a better option.

show abstract

Section: Design and Fabrication Of Thorax Phantommentioning

confidence: 99%