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Figure 6: Error histograms of differences in leaf positions determined from trajectory log record and electronic portal imaging device images for A Bank and B Bank for all five fields of an intensity-modulated radiation therapy case (Color indicates frame number) (a) Field 1 Bank A (b) Field 1 Bank B (c) Field 2 Bank A (d) Field 2 Bank B (e) Field 3 Bank A (f) Field 3 Bank B (g) Field 4 Bank A (h) Field 4 Bank 4 (i) Field 5 Bank A (j) Field 5 Bank B

Figure 6: Error histograms of differences in leaf positions determined from trajectory log record and electronic portal imaging device images for A Bank and B Bank for all five fields of an intensity-modulated radiation therapy case (Color indicates frame number) (a) Field 1 Bank A (b) Field 1 Bank B (c) Field 2 Bank A (d) Field 2 Bank B (e) Field 3 Bank A (f) Field 3 Bank B (g) Field 4 Bank A (h) Field 4 Bank 4 (i) Field 5 Bank A (j) Field 5 Bank B