Figure 6From: Verifying 4D gated radiotherapy using time-integrated electronic portal imaging: a phantom and clinical studyPositions of the bronchial tree on TI-EPI during 26 end-inspiration phase gating fractions of patient 1 (left). Similarly, the positions on TI-EPI of both fiducial markers in patient 2 during 17 end-expiration gating fractions are shown (right).Back to article page