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Fig. 2 | Radiation Oncology

Fig. 2

From: Efficacy and safety of MR-guided adaptive simultaneous integrated boost radiotherapy to primary lesions and positive lymph nodes in the neoadjuvant treatment of locally advanced rectal cancer: a randomized controlled phase III trial

Fig. 2

The difference between online adaptive contouring on MR images and using the original contour from planning CT images. (A) The upper image demonstrates the transfer of the planning CT by rigid alignment to the MR scanned prior to daily radiotherapy, highlighting the ability of adaptive radiotherapy to adjust to anatomical changes on the same day. (B) The dose‒volume histogram (DVH) displays the relevant organs at risk (OAR) and tumor targets in corresponding colors using dashed lines for the original plan based on CT and solid lines for the optimized plan based on MR. The optimized plan improves target coverage while reducing the dose to the OAR

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Radiation Oncology

ISSN: 1748-717X

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