From the Main Entrance: Enter the hospital via the Main Entrance located at 330 Brookline Avenue on the East Campus. After entering, walk through the main lobby to your left. Walk through the corridor past the Dunkin Donuts cart, which will take you into the Rabb Building. After you pass through an automatic door to enter the Rabb Building, you will turn to the right. Look for signs directing you to the Gryzmish Elevators. Take the elevator to the third floor and check in at the Department of Radiology reception desk.