This is a contiguous series of sagitally reformatted CT slices of the same 28y old man whose axial and coronal slices are shown in the previous sets of images. The first slice is most leftward, and the series progresses to the patient's right. You can look at the video frame by frame and try to identify the lettered structures to which lines are drawn. The answers will be revealed when you click on the appropriately labelled drop-down arrows below the image.