Excluding diagnostic work....
Let's talk about intervention.
Fortunately or unfortunately depending on how you look at it most blunt trauma injuries are taken care of non-operatively. In exchange for the "nonoperative" approach, a majority of blunt trauma, stable bleeds or lacs are managed either with medical management and/or interventional radiology.
At a level I trauma facility, interventional radiology is very busy with embolizing splenic and hepatic lacs, as well as pelvic trauma, and GI bleed unimeniable to endoscopy therapy. If you are not at a level one trauma center you will see a lot less "action" as an interventional radiologist.