Interfractional Variations of Tumor Centroid Position and Tumor Regression during Stereotactic Body Radiotherapy for Lung Tumor

Figure 2

(a) shows the mean 3D shift of tumor centroid position over time. Horizontal lines represent the mean 3D shift of tumor centroid position. Vertical lines represent the 95% error bars. (b), (c), and (d) show the 3D vector shift vectors in upper, middle, and lower lobe tumors for each patient. Each color represents the interfractional variation of tumor position of one patient.

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