DİNESH KUMAR SAROJ, GOPA GHOSH, SHUCHİSHREE SHUKLA, SURESH YADAV, NEETU PALİWAL
Turkish Journal of Oncology - 2022;37(4):436-445
OBJECTIVE The study was conducted to compare the dosimetric superiority between the three-dimensional conformal radiation therapy (3DCRT), intensity-modulated radiation therapy (IMRT) and Rapid Arc in terms of treatment plan quality. METHODS We have taken 15 Patients of ca-esophagus for our study from our hospital database. Patients were already treated 3DCRT plan. Retrospectively additional IMRT and RA plans were created with Planning target volume (PTV) prescription dose of 50.4Gy in 28 fractions. Prescription dose of 95% of PTV was chosen for the comparison between three treatment planning strategies. Dose volume histogram was used to analyze and compare various plan quality index and doses to the organs at risk (OARs). RESULTS The D95% of PTV for 3DCRT plan was 47.85±0.78 Gy, which significantly got improved in IMRT (48.75±0.86 Gy) and RA (49.0±0.64 Gy) plans. The CI value for PTV coverage in 3DCRT was 0.96±0.04; however, the CI values in IMRT and RA plans were significant at 0.98±0.01 and 0.98±0.03, respectively. The 3DCRT plan had an HI of 1.09±0.03, which was significantly raised to 1.046±0.26 in the IMRT plan (p=0.01) and 1.06±0.02 in the RA plan (p=0.03). CONCLUSION An IMRT and RA plan gives greater conformity of dose to the PTV in comparison to 3DCRT. Lesser doses to the surrounding OARs are the major importance of the IMRT and RA planning technique. Dose escalation is possible with IMRT and RA plans.
