This is a contiguous series of coronal T1-weighted MRI and coronal MRA (magnetic resonance angiography) images of the chest in a 14y old girl. The first image is the most anterior of those shown, and the series progresses posteriorly. The MRA images are not precisely through the same section as the MRI images, but they are pretty close. You can scan through the series either by (1) positioning the cursor over the image, holding down the left mouse button, then sliding the cursor up or down the image, or (2) hitting the keyboard keys > and < (no shift required). Scan through the series of slices and try to identify the structures to which lines are drawn on the MRI images. In some instances you may find it easier to identify the structure by looking for it on the corresponding MRA image. The answers will be revealed when you click on the appropriately labelled drop-down arrows below the image.