A retractable containment wall separates an imaging suite into two sections: a “hot” or contaminated section and a “cold” or non-contaminated section. The wall includes a center portion and retractable peripheral portions. Each retractable portion is made up of several panels. Between panels, between a panel and a room wall, and between a panel and the center portion are tongue and groove seals that mate to form seals at seams in the wall when the wall is deployed. Guide pins propagate along a guide track to facilitate transition of the portions between deployed and retracted orientations. The center portion includes a tube that extends into the imaging region of a diagnostic imaging device located in the non-contaminated portion of the imaging suite. The subject is inserted into the tube in preparation for an imaging procedure.