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Figure 1 | Radiation Oncology

Figure 1

From: Retrospective feasibility study of simultaneous integrated boost in cervical cancer using tomotherapy: the impact of organ motion and tumor regression

Figure 1

Standardized guidelines on contouring the clinical target volume - simultaneous integrated boost (CTV-SIB) on the planning-CT and weekly MV-CTs. Guidelines were adapted from Viswanathan et al. Axial and sagittal view of weekly contouring in one of the patients. The CTV-SIB structures included were: In red: The cervix containing the tumor. In yellow: Parametriums were divided as: · If inner half invasion: Butterfly shape structure <2 cm from cervix edge. · If outer half invasion: Butterfly shape structure > 2 cm from cervix edge. In green (sagittal view): Corpus uteri. · If there was myometrial infiltration the entire corpus uteri was included. · If there was no myometrial infiltration, a 2-cm expansion was added from the proximal extend of the superior cervix edge or to a point at which volume expands (indicating presence of uterine tissue – where the uterine cavity appears). The vagina was contoured as a 2 cm expansion inferior to cervix edge.

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