The results of this study suggest that high dose rate interstitial brachytherapy was appropriate for the treatment of early staged carcinoma of eye lid.
Introduction: Volumetric Arc Radiotherapy (VMAT) is an advanced technique. Calculations of VMATplans are not so accurate even with State-of-Art dose calculation algorithms due to their complexity.Hence pre-treatment patient specific Quality Assurance (QA) of each VMAT plan is required. In thepresent study Electronic Portal Imaging Device (EPID) based portal dosimetry system was used forpre-treatment patient specific QA. Material and Methods: A total of 50 patients were chosen inthis study. Verification plans of each patient were calculated for portal dosimetry then executed onthe EPID system to measure the spatial distribution of radiation dose. Calculated and measured dosedistribution were compared to evaluate Gamma Index (GI) passing criteria of Dose Difference (DD)of 3% and Distance–to-Agreement (DTA) of 3mm, Area Gamma (γ% ≤1) >95%, Average Gamma(gAve) <0.5% and Maximum Gamma (gMax) <3.5%. Results: The mean values of Area Gamma (γ%≤1) were observed to be varied from 99.14±0.23% to 99.87±0.18%. The Mean Values of AverageGamma (gAve) are found to vary from 0.19±0.05% to 0.15±0.04% and the mean values ofMaximum Gamma (gMax) found to be varied from 1.94±0.37% to 1.59±0.41%. All the plans werepassed the gamma index criteria with very good agreement. Thus the use of Portal Dosimetry forpre-treatment patient QA is found to be a very useful, quick, precise, efficient and effective pre-treatment patient specific QA tool for VMAT treatment. Conclusion: Portal Dosimetry can be utilizedfor routine use for patient specific quality assurance for Volumetric Arc Radiotherapy treatment.
Transitional cell carcinoma of the ovary is a rare variant of epithelial ovarian cancers(EOC).It has been described as a primary ovarian carcinoma with definite urothelial features but no benign, metaplastic and/or proliferating Brenner tumor (BT) identified. Recognition of such tumors is important because of its rarity, favorable response to chemotherapy and an improved patient survival. Treatment comprised multimodality approach using surgery, chemotherapy and radiotherapy. Surgery remains the mainstay of the treatment of this variant of EOC. Postoperative adjuvant radiotherapy improved local control in patients with adverse prognostic factors. Adjuvant radiotherapy improves outcome in patients with adverse factors.
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