How to align symbol image in Treeview

I have a Treeview that uses a Sitemap files as data source. I set NodeWrap="true" because some of my title is long. I have a small symbol image before each title. If the title is long enough to wrap into 2 lines, the symbol will locate vertically between these 2 lines. I want it align vertically with the upper line and don't know how to do it. Please help. Thank you.