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. 2020 Mar 5;15:55. doi: 10.1186/s13014-020-01503-9

Fig. 1.

Fig. 1

Clinical target volume (CTV) contour on the CT acquired at weeks 0 (planning CT) a for a typical patient enrolled in the passive scattering proton therapy (PSPT) group, who received adaptive radiotherapy (ART) at week 4. The deformed contour (red dash line) was compared with the clinical approved contour on the CT acquired at week 4 b