Review Article

Technical Advances and Pitfalls in Head and Neck Radiotherapy

Figure 3

(a): Patient with locally advanced nasopharyngeal cancer showing CT simulation planning CT and a corresponding daily CBCT localization scan acquired during week 4 of treatment. Primary tumor is outlined in red. Note the interval tumor regression evident on CBCT. (b): Superimposed planning CT and CBCT demonstrating obvious anterior-posterior misalignment before then after image-guided correction.
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(a)
597467.fig.003b
(b)