Figure 69-2 Intraoperative radiation therapy room. A sterile Lucite cylinder is used to isolate the tumor mass and displace normal tissues to limit the radiation dose. (From Mackenzie RA, Southorn PA, Stensrud PE: Anesthesia at remote locations. In Miller RD [ed]: Anesthesiology, 5th ed. Philadelphia, Churchill Livingstone, 2000, p 2261.)