CROSS-SECTIONAL CLINICAL STUDY TO EVALUATE THE PTV (PLANNING TARGET VOLUME) MARGIN ERRORS HEAD, NECK, AND BREAST CANCER
Keywords:
breast cancer, head cancer, neck cancer, planning target volum, shifting marginsAbstract
Background: To provide quality assurance in patients receiving radiation therapy for different types of cancer, it is
critical to accurately assess the setup faults.
Aim: The current cross-sectional clinical study set out to evaluate the PTV (planning target volume) margin errors in
individuals with head, neck, and breast cancer in a random and systematic manner.
Methods: A total of 100 participants with breast cancer and 96 subjects with head and neck cancer were evaluated in this study. Treatment setup and radiation were carried out using EPIDs (electronic portal imaging). The treatment's mistakes were evaluated using the Herk formula, and conclusions were drawn.
Results: On the x, y, and z axes, PTV margin shifting error was 1.41, 2.31, and 1.48 mm for breast cancer and 2.77, 1.53, and 4.36 mm for head and neck cancer.For breast cancer, the random error was 0.64, 0.70, and 0.77 mm; for head and neck cancer, it was 0.80, 0.66, and 0.92 mm. On the x, y, and z-axes, the systematic error was, however, 0.87, 0.41, and 1.47 mm for head and neck cancer and 0.37, 0.72, and 0.36 mm for breast cancer.
Conclusion: Based on the study's limitations, it may be concluded that the location of tumors affects the setup mistakes in cancer. The current study highlights the potential benefits of utilising electronic portal imaging equipment to lower setup verification procedure uncertainty.
