Figure 1From: Determination of patient-specific internal gross tumor volumes for lung cancer using four-dimensional computed tomographyDelineation of IGTV for stage I lung tumors based on (a) IGTV MIP , (b) IGTV MIP-Modified , (c) IGTV 2Phases , and (d) IGTV AllPhases of a 4-D CT data set. MIP-based contours, as shown in panels (a) and (b), are as they appear on the MIP data set. Phase-based contours, as shown in panels (c) and (d), are registered to the peak exhalation phase of the 4-D CT data set.Back to article page